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WebDriver

WebDriver drives a browser natively, learn more about it.

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Der WebDriver steuert einen Browser so, wie es ein Benutzer tun würde, entweder lokal oder auf einem entfernten Rechner unter Verwendung des Selenium Servers. Dies ist ein Meilenstein in der Automatisierung von Browsern.

Selenium WebDriver gilt als Synonym sowohl für die Programmiersprachimplementierungen als auch für das Steuerprogramm das den Browser steuert. Dies wird allgemein als WebDriver bezeichnet.

Selenium WebDriver ist eine W3C Recommendation

  • WebDriver ist eine einfache und übersichtliche Schnittstelle.

  • WebDriver ist eine kompakte objektorientierte API.

  • WebDriver steuert den Browser effektiv.

1 - Erklärung der Komponenten

Um eine Testsuite mit Hilfe des WebDrivers zu erstellen, ist es notwendig verschiedeneste Komponenten des WebDrivers zu verstehen und richtig einzusetzten. Wie bei fast allen in der Softwareentwicklung, gibt es viele Lösungsmöglichkeiten um eine Idee umzusetzten. Folgend ein paar Begriffsdefinitionen die in der Beschreibung genutzt werden.

Begriffsdefinitionen

  • API: Application Programming Interface (= Programmschnittstelle). Beschreibt eine Sammlung von Kommandos, die verwendet werden um den WebDriver zu konfigurieren.
  • Bibliothek: (= Libary) Ein Modul welches die APIs und den erforderlichen Programmcode beinhaltet, der notwendig ist für die Implementierung der Schnittstellen. Die Bibliotheken sind programmiersprachenspezifisch, z.B. .jar Dateien für Java, .dll Dateien für .NET, etc.
  • Driver: Der Driver ist verantwortlich für das Steuern des Browsers. Die meisten WebDriver werden von den Browserherstellern selbst erstellt. Driver sind die ausführen Module die auf dem gleichen System ausgeführt werden auf denen der Browser gestartet wird, nicht auf den Systemen auf denen die Testsuiten laufen. (Natürlich kann das auch auf dem gleichen System ausgeführt werden.) Bemerkung: Manche bezeichnen den Driver als Proxy.
  • Framework: Eine zusätzliche Bibliothek die als Unterstützung für WebDriver Suites dient. Diese Bibliotheken entsprechen Testframeworks sowie JUnit oder NUnit. Weiters existieren Frameworks die mit naürlicher Sprache Anforderungen beschreiben wie z.B. Cucumber oder Robotium. Frameworks können auch für Tätigkeiten wie z.B. Konfiguration des Testsystems, für Datenmanipulationen, als Testorakel, etc. verwendet werden.

Die einzelnen Komponenten im Detail

Der WebDriver kommuniziert mit dem Browser zumindest mit Hilfe des Drivers. Die Kommunikation erfolgt bidirektional: Der WebDriver sendet die Kommandos an den Browser, mit Hilfe des Drivers und erhält Informationen zurück über den gleichen Weg.

Basic Communication

Der Driver is browserspezifisch, z.B. der ChromeDriver ist für Google’s Chrome/Chromium, der GeckoDriver für Mozilla’s Firefox, etc. verantwortlich. Der Driver wird auf dem selben System wie der Browser ausgeführt. Dies kann aber muss nicht das gleiche System sein, auf dem die Tests ausgeführt werden.

Das einfache Beispiel weiter oben zeigt eine direkte Kommunikation. Die Kommunikation zum Browser kann auch über eine remote Verbindung mit einem Selenium Server oder einem RemoteWebDriver erfolgen. Der RemoteWebDriver läuft am selben System wie der Driver und der Browser.

Remote Communication

Die remote Kommunikation kann ebenfalls mit Hilfe eines Selenium Servers oder einem Selenium Grid realisiert werden. Beide Möglichkeiten kommunizieren mit dem driver auf dem Zielsystem (=host).

Remote Communication with Grid

Einbinden eines Frameworks

Der WebDriver hat einen einzigen Job: Kommunikation mit dem Browser mittels WebDriver, egal welche der oben beschriebenen Wege genutzt wird. WebDriver selbst hat keine Testfunktionen: Dieser kann nicht Werte vergleichen, feststellen ob ein Test ok ist oder fehlschlägt und er besitzt keine Funktionen bezüglich Reporting oder kennt auch nicht die Angenommen/Wenn/Dann Grammatik.

Das ist der Punkt an dem verschiedenste Frameworks ins Spiel kommen. Zumindest ist es notwendig ein Testframework für die entsprechende Programmiersprache zu verwenden wie z.B. NUnit für .NET, JUnit für Java, RSpec für Ruby, etc.

Das Testframework ist verwantwortlich für die Ausführung des WebDrivers und der entsprechenden Schritte in den Tests. Eine schematische Darstellung ist in der folgenden Grafik zu finden.

Test Framework

Frameworks oder Tools die natürliche Sprache verwenden wie z.B. Cucucmber können in ein solches Testframework eingebunden werden wie in der Grafik dargestellt ist, oder sie können eine eigene Implementierung anbieten und ein anderes Testframework wrappen.

2 - Browser manipulation

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Ruby

Ruby is not installed by default on Windows. Download the latest version and run the installer. You can leave all settings at default values, except at the Installation Destination and Optional Tasks screen check where you need to check the Add Ruby executables to your PATH checkbox. To drive any browser, you have to install selenium-webdriver Ruby gem. To install it, open command prompt and type this:

gem install selenium-webdriver

Or, if you use Bundler, add this line to your application’s Gemfile:

gem "selenium-webdriver"

And then execute the following command in command prompt:

bundle install

Internet Explorer

Internet Explorer is installed by default on Windows, so no installation is needed. To drive Internet Explorer on Windows, you have to download the latest Internet Explorer Driver and put the file into a folder that is in PATH. To find out which directories are in PATH, type echo %PATH% in command prompt.

$ echo %PATH%
C:\Ruby200\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem

C:\Ruby200\bin looks like a good place. Unzip IEDriverServer file and move IEDriverServer.exe there.

This should open a new Internet Explorer window:

require "selenium-webdriver"
driver = Selenium::WebDriver.for :internet_explorer

Browser navigation

The first thing you will want to do after launching a browser is to open your website. This can be achieved in a single line:

//Convenient
driver.get("https://selenium.dev");

//Longer way
driver.navigate().to("https://selenium.dev");
  
driver.get("https://selenium.dev")
  
driver.Navigate().GoToUrl(@"https://selenium.dev");
  
# Convenient way
driver.get 'https://selenium.dev'

# Longer Way
driver.navigate.to 'https://selenium.dev'
  
await driver.get('https://selenium.dev');
  
//Convenient
driver.get("https://selenium.dev")

//Longer way
driver.navigate().to("https://selenium.dev")
  

Get current URL

You can read the current URL from the browser’s address bar using:

driver.getCurrentUrl();
driver.current_url
driver.Url;
driver.current_url
await driver.getCurrentUrl();
driver.currentUrl

Back

Pressing the browser’s back button:

driver.navigate().back();
driver.back()
driver.Navigate().Back();
driver.navigate.back
await driver.navigate().back();
driver.navigate().back() 

Forward

Pressing the browser’s forward button:

driver.navigate().forward();
driver.forward()
driver.Navigate().Forward();
driver.navigate.forward
await driver.navigate().forward();
driver.navigate().forward()

Refresh

Refresh the current page:

driver.navigate().refresh();
driver.refresh()
driver.Navigate().Refresh();
driver.navigate.refresh
await driver.navigate().refresh();
driver.navigate().refresh()

Get title

You can read the current page title from the browser:

driver.getTitle();
driver.title
driver.Title;
driver.title
await driver.getTitle();
driver.title

Windows and tabs

Get window handle

WebDriver does not make the distinction between windows and tabs. If your site opens a new tab or window, Selenium will let you work with it using a window handle. Each window has a unique identifier which remains persistent in a single session. You can get the window handle of the current window by using:

driver.getWindowHandle();
driver.current_window_handle
driver.CurrentWindowHandle;
driver.window_handle
await driver.getWindowHandle();
driver.windowHandle

Switching windows or tabs

Clicking a link which opens in a new window will focus the new window or tab on screen, but WebDriver will not know which window the Operating System considers active. To work with the new window you will need to switch to it. If you have only two tabs or windows open, and you know which window you start with, by the process of elimination you can loop over both windows or tabs that WebDriver can see, and switch to the one which is not the original.

However, Selenium 4 provides a new api NewWindow which creates a new tab (or) new window and automatically switches to it.

//Store the ID of the original window
String originalWindow = driver.getWindowHandle();

//Check we don't have other windows open already
assert driver.getWindowHandles().size() == 1;

//Click the link which opens in a new window
driver.findElement(By.linkText("new window")).click();

//Wait for the new window or tab
wait.until(numberOfWindowsToBe(2));

//Loop through until we find a new window handle
for (String windowHandle : driver.getWindowHandles()) {
    if(!originalWindow.contentEquals(windowHandle)) {
        driver.switchTo().window(windowHandle);
        break;
    }
}

//Wait for the new tab to finish loading content
wait.until(titleIs("Selenium documentation"));
  
from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

# Start the driver
with webdriver.Firefox() as driver:
    # Open URL
    driver.get("https://seleniumhq.github.io")

    # Setup wait for later
    wait = WebDriverWait(driver, 10)

    # Store the ID of the original window
    original_window = driver.current_window_handle

    # Check we don't have other windows open already
    assert len(driver.window_handles) == 1

    # Click the link which opens in a new window
    driver.find_element(By.LINK_TEXT, "new window").click()

    # Wait for the new window or tab
    wait.until(EC.number_of_windows_to_be(2))

    # Loop through until we find a new window handle
    for window_handle in driver.window_handles:
        if window_handle != original_window:
            driver.switch_to.window(window_handle)
            break

    # Wait for the new tab to finish loading content
    wait.until(EC.title_is("SeleniumHQ Browser Automation"))
  
//Store the ID of the original window
string originalWindow = driver.CurrentWindowHandle;

//Check we don't have other windows open already
Assert.AreEqual(driver.WindowHandles.Count, 1);

//Click the link which opens in a new window
driver.FindElement(By.LinkText("new window")).Click();

//Wait for the new window or tab
wait.Until(wd => wd.WindowHandles.Count == 2);

//Loop through until we find a new window handle
foreach(string window in driver.WindowHandles)
{
    if(originalWindow != window)
    {
        driver.SwitchTo().Window(window);
        break;
    }
}
//Wait for the new tab to finish loading content
wait.Until(wd => wd.Title == "Selenium documentation");
  
#Store the ID of the original window
original_window = driver.window_handle

#Check we don't have other windows open already
assert(driver.window_handles.length == 1, 'Expected one window')

#Click the link which opens in a new window
driver.find_element(link: 'new window').click

#Wait for the new window or tab
wait.until { driver.window_handles.length == 2 }

#Loop through until we find a new window handle
driver.window_handles.each do |handle|
    if handle != original_window
        driver.switch_to.window handle
        break
    end
end

#Wait for the new tab to finish loading content
wait.until { driver.title == 'Selenium documentation'}
  
//Store the ID of the original window
const originalWindow = await driver.getWindowHandle();

//Check we don't have other windows open already
assert((await driver.getAllWindowHandles()).length === 1);

//Click the link which opens in a new window
await driver.findElement(By.linkText('new window')).click();

//Wait for the new window or tab
await driver.wait(
    async () => (await driver.getAllWindowHandles()).length === 2,
    10000
  );

//Loop through until we find a new window handle
const windows = await driver.getAllWindowHandles();
windows.forEach(async handle => {
  if (handle !== originalWindow) {
    await driver.switchTo().window(handle);
  }
});

//Wait for the new tab to finish loading content
await driver.wait(until.titleIs('Selenium documentation'), 10000);
  
//Store the ID of the original window
val originalWindow = driver.getWindowHandle()

//Check we don't have other windows open already
assert(driver.getWindowHandles().size() === 1)

//Click the link which opens in a new window
driver.findElement(By.linkText("new window")).click()

//Wait for the new window or tab
wait.until(numberOfWindowsToBe(2))

//Loop through until we find a new window handle
for (windowHandle in driver.getWindowHandles()) {
    if (!originalWindow.contentEquals(windowHandle)) {
        driver.switchTo().window(windowHandle)
        break
    }
}

//Wait for the new tab to finish loading content
wait.until(titleIs("Selenium documentation"))

  

Create new window (or) new tab and switch

Creates a new window (or) tab and will focus the new window or tab on screen. You don’t need to switch to work with the new window (or) tab. If you have more than two windows (or) tabs opened other than the new window, you can loop over both windows or tabs that WebDriver can see, and switch to the one which is not the original.

Note: This feature works with Selenium 4 and later versions.

// Opens a new tab and switches to new tab
driver.switchTo().newWindow(WindowType.TAB);

// Opens a new window and switches to new window
driver.switchTo().newWindow(WindowType.WINDOW);
  
# Opens a new tab and switches to new tab
driver.switch_to.new_window('tab')

# Opens a new window and switches to new window
driver.switch_to.new_window('window')
  
// Opens a new tab and switches to new tab
driver.SwitchTo().NewWindow(WindowType.Tab)

// Opens a new window and switches to new window
driver.SwitchTo().NewWindow(WindowType.Window)
  
# Note: The new_window in ruby only opens a new tab (or) Window and will not switch automatically
# The user has to switch to new tab (or) new window

# Opens a new tab and switches to new tab
driver.manage.new_window(:tab)

# Opens a new window and switches to new window
driver.manage.new_window(:window)
  
// Opens a new tab and switches to new tab
await driver.switchTo().newWindow('tab');

// Opens a new window and switches to new window
await driver.switchTo().newWindow('window');

  
// Opens a new tab and switches to new tab
driver.switchTo().newWindow(WindowType.TAB)

// Opens a new window and switches to new window
driver.switchTo().newWindow(WindowType.WINDOW)
  

Closing a window or tab

When you are finished with a window or tab and it is not the last window or tab open in your browser, you should close it and switch back to the window you were using previously. Assuming you followed the code sample in the previous section you will have the previous window handle stored in a variable. Put this together and you will get:

//Close the tab or window
driver.close();

//Switch back to the old tab or window
driver.switchTo().window(originalWindow);
  
#Close the tab or window
driver.close()

#Switch back to the old tab or window
driver.switch_to.window(original_window)
  
//Close the tab or window
driver.Close();

//Switch back to the old tab or window
driver.SwitchTo().Window(originalWindow);
  
#Close the tab or window
driver.close

#Switch back to the old tab or window
driver.switch_to.window original_window
  
//Close the tab or window
await driver.close();

//Switch back to the old tab or window
await driver.switchTo().window(originalWindow);
  
//Close the tab or window
driver.close()

//Switch back to the old tab or window
driver.switchTo().window(originalWindow)

  

Forgetting to switch back to another window handle after closing a window will leave WebDriver executing on the now closed page, and will trigger a No Such Window Exception. You must switch back to a valid window handle in order to continue execution.

Quitting the browser at the end of a session

When you are finished with the browser session you should call quit, instead of close:

driver.quit();
driver.quit()
driver.Quit();
driver.quit
await driver.quit();
driver.quit()
  • Quit will:
    • Close all the windows and tabs associated with that WebDriver session
    • Close the browser process
    • Close the background driver process
    • Notify Selenium Grid that the browser is no longer in use so it can be used by another session (if you are using Selenium Grid)

Failure to call quit will leave extra background processes and ports running on your machine which could cause you problems later.

Some test frameworks offer methods and annotations which you can hook into to tear down at the end of a test.

/**
 * Example using JUnit
 * https://junit.org/junit5/docs/current/api/org/junit/jupiter/api/AfterAll.html
 */
@AfterAll
public static void tearDown() {
    driver.quit();
}
  
# unittest teardown
# https://docs.python.org/3/library/unittest.html?highlight=teardown#unittest.TestCase.tearDown
def tearDown(self):
    self.driver.quit()
  
/*
    Example using Visual Studio's UnitTesting
    https://msdn.microsoft.com/en-us/library/microsoft.visualstudio.testtools.unittesting.aspx
*/
[TestCleanup]
public void TearDown()
{
    driver.Quit();
}
  
# UnitTest Teardown
# https://www.rubydoc.info/github/test-unit/test-unit/Test/Unit/TestCase
def teardown
    @driver.quit
end
  
/**
 * Example using Mocha
 * https://mochajs.org/#hooks
 */
after('Tear down', async function () {
  await driver.quit();
});
  
/**
 * Example using JUnit
 * https://junit.org/junit5/docs/current/api/org/junit/jupiter/api/AfterAll.html
 */
@AfterAll
fun tearDown() {
    driver.quit()
}
  

If not running WebDriver in a test context, you may consider using try / finally which is offered by most languages so that an exception will still clean up the WebDriver session.

try {
    //WebDriver code here...
} finally {
    driver.quit();
}
  
try:
    #WebDriver code here...
finally:
    driver.quit()
  
try {
    //WebDriver code here...
} finally {
    driver.Quit();
}
  
begin
    #WebDriver code here...
ensure
    driver.quit
end
  
try {
    //WebDriver code here...
} finally {
    await driver.quit();
}
  
try {
    //WebDriver code here...
} finally {
    driver.quit()
}
  

Python’s WebDriver now supports the python context manager, which when using the with keyword can automatically quit the driver at the end of execution.

with webdriver.Firefox() as driver:
  # WebDriver code here...

# WebDriver will automatically quit after indentation

Frames and Iframes

Frames are a now deprecated means of building a site layout from multiple documents on the same domain. You are unlikely to work with them unless you are working with an pre HTML5 webapp. Iframes allow the insertion of a document from an entirely different domain, and are still commonly used.

If you need to work with frames or iframes, WebDriver allows you to work with them in the same way. Consider a button within an iframe. If we inspect the element using the browser development tools, we might see the following:

<div id="modal">
  <iframe id="buttonframe" name="myframe"  src="https://seleniumhq.github.io">
   <button>Click here</button>
 </iframe>
</div>

If it was not for the iframe we would expect to click on the button using something like:

//This won't work
driver.findElement(By.tagName("button")).click();
  
# This Wont work
driver.find_element(By.TAG_NAME, 'button').click()
  
//This won't work
driver.FindElement(By.TagName("button")).Click();
  
# This won't work
driver.find_element(:tag_name,'button').click
  
// This won't work
await driver.findElement(By.css('button')).click();
  
//This won't work
driver.findElement(By.tagName("button")).click()
  

However, if there are no buttons outside of the iframe, you might instead get a no such element error. This happens because Selenium is only aware of the elements in the top level document. To interact with the button, we will need to first switch to the frame, in a similar way to how we switch windows. WebDriver offers three ways of switching to a frame.

Using a WebElement

Switching using a WebElement is the most flexible option. You can find the frame using your preferred selector and switch to it.

//Store the web element
WebElement iframe = driver.findElement(By.cssSelector("#modal>iframe"));

//Switch to the frame
driver.switchTo().frame(iframe);

//Now we can click the button
driver.findElement(By.tagName("button")).click();
  
# Store iframe web element
iframe = driver.find_element(By.CSS_SELECTOR, "#modal > iframe")

# switch to selected iframe
driver.switch_to.frame(iframe)

# Now click on button
driver.find_element(By.TAG_NAME, 'button').click()
  
//Store the web element
IWebElement iframe = driver.FindElement(By.CssSelector("#modal>iframe"));

//Switch to the frame
driver.SwitchTo().Frame(iframe);

//Now we can click the button
driver.FindElement(By.TagName("button")).Click();
  
# Store iframe web element
iframe = driver.find_element(:css,'#modal > iframe')

# Switch to the frame
driver.switch_to.frame iframe

# Now, Click on the button
driver.find_element(:tag_name,'button').click
  
// Store the web element
const iframe = driver.findElement(By.css('#modal > iframe'));

// Switch to the frame
await driver.switchTo().frame(iframe);

// Now we can click the button
await driver.findElement(By.css('button')).click();
  
//Store the web element
val iframe = driver.findElement(By.cssSelector("#modal>iframe"))

//Switch to the frame
driver.switchTo().frame(iframe)

//Now we can click the button
driver.findElement(By.tagName("button")).click()
  

Using a name or ID

If your frame or iframe has an id or name attribute, this can be used instead. If the name or ID is not unique on the page, then the first one found will be switched to.

//Using the ID
driver.switchTo().frame("buttonframe");

//Or using the name instead
driver.switchTo().frame("myframe");

//Now we can click the button
driver.findElement(By.tagName("button")).click();
  
# Switch frame by id
driver.switch_to.frame('buttonframe')

# Now, Click on the button
driver.find_element(By.TAG_NAME, 'button').click()
  
//Using the ID
driver.SwitchTo().Frame("buttonframe");

//Or using the name instead
driver.SwitchTo().Frame("myframe");

//Now we can click the button
driver.FindElement(By.TagName("button")).Click();
  
# Switch by ID
driver.switch_to.frame 'buttonframe'

# Now, Click on the button
driver.find_element(:tag_name,'button').click
  
// Using the ID
await driver.switchTo().frame('buttonframe');

// Or using the name instead
await driver.switchTo().frame('myframe');

// Now we can click the button
await driver.findElement(By.css('button')).click();
  
//Using the ID
driver.switchTo().frame("buttonframe")

//Or using the name instead
driver.switchTo().frame("myframe")

//Now we can click the button
driver.findElement(By.tagName("button")).click()
  

Using an index

It is also possible to use the index of the frame, such as can be queried using window.frames in JavaScript.

// Switches to the second frame
driver.switchTo().frame(1);
  
# Switch to the second frame
driver.switch_to.frame(1)
  
// Switches to the second frame
driver.SwitchTo().Frame(1);
  
# switching to second iframe based on index
iframe = driver.find_elements_by_tag_name('iframe')[1]

# switch to selected iframe
driver.switch_to.frame(iframe)
  
// Switches to the second frame
await driver.switchTo().frame(1);
  
// Switches to the second frame
driver.switchTo().frame(1)
  

Leaving a frame

To leave an iframe or frameset, switch back to the default content like so:

// Return to the top level
driver.switchTo().defaultContent();
  
# switch back to default content
driver.switch_to.default_content()
  
// Return to the top level
driver.SwitchTo().DefaultContent();
  
# Return to the top level
driver.switch_to.default_content
  
// Return to the top level
await driver.switchTo().defaultContent();
  
// Return to the top level
driver.switchTo().defaultContent()
  

Window management

Screen resolution can impact how your web application renders, so WebDriver provides mechanisms for moving and resizing the browser window.

Get window size

Fetches the size of the browser window in pixels.

//Access each dimension individually
int width = driver.manage().window().getSize().getWidth();
int height = driver.manage().window().getSize().getHeight();

//Or store the dimensions and query them later
Dimension size = driver.manage().window().getSize();
int width1 = size.getWidth();
int height1 = size.getHeight();
  
# Access each dimension individually
width = driver.get_window_size().get("width")
height = driver.get_window_size().get("height")

# Or store the dimensions and query them later
size = driver.get_window_size()
width1 = size.get("width")
height1 = size.get("height")
  
//Access each dimension individually
int width = driver.Manage().Window.Size.Width;
int height = driver.Manage().Window.Size.Height;

//Or store the dimensions and query them later
System.Drawing.Size size = driver.Manage().Window.Size;
int width1 = size.Width;
int height1 = size.Height;
  
# Access each dimension individually
width = driver.manage.window.size.width
height = driver.manage.window.size.height

# Or store the dimensions and query them later
size = driver.manage.window.size
width1 = size.width
height1 = size.height
  
// Access each dimension individually
const { width, height } = await driver.manage().window().getRect();

// Or store the dimensions and query them later
const rect = await driver.manage().window().getRect();
const width1 = rect.width;
const height1 = rect.height;
  
//Access each dimension individually
val width = driver.manage().window().size.width
val height = driver.manage().window().size.height

//Or store the dimensions and query them later
val size = driver.manage().window().size
val width1 = size.width
val height1 = size.height
  

Set window size

Restores the window and sets the window size.

driver.manage().window().setSize(new Dimension(1024, 768));
driver.set_window_size(1024, 768)
driver.Manage().Window.Size = new Size(1024, 768);
driver.manage.window.resize_to(1024,768)
await driver.manage().window().setRect({ width: 1024, height: 768 });
driver.manage().window().size = Dimension(1024, 768)

Get window position

Fetches the coordinates of the top left coordinate of the browser window.

// Access each dimension individually
int x = driver.manage().window().getPosition().getX();
int y = driver.manage().window().getPosition().getY();

// Or store the dimensions and query them later
Point position = driver.manage().window().getPosition();
int x1 = position.getX();
int y1 = position.getY();
  
# Access each dimension individually
x = driver.get_window_position().get('x')
y = driver.get_window_position().get('y')

# Or store the dimensions and query them later
position = driver.get_window_position()
x1 = position.get('x')
y1 = position.get('y')
  
//Access each dimension individually
int x = driver.Manage().Window.Position.X;
int y = driver.Manage().Window.Position.Y;

//Or store the dimensions and query them later
Point position = driver.Manage().Window.Position;
int x1 = position.X;
int y1 = position.Y;
  
#Access each dimension individually
x = driver.manage.window.position.x
y = driver.manage.window.position.y

# Or store the dimensions and query them later
rect  = driver.manage.window.rect
x1 = rect.x
y1 = rect.y
  
// Access each dimension individually
const { x, y } = await driver.manage().window().getRect();

// Or store the dimensions and query them later
const rect = await driver.manage().window().getRect();
const x1 = rect.x;
const y1 = rect.y;
  
// Access each dimension individually
val x = driver.manage().window().position.x
val y = driver.manage().window().position.y

// Or store the dimensions and query them later
val position = driver.manage().window().position
val x1 = position.x
val y1 = position.y

  

Set window position

Moves the window to the chosen position.

// Move the window to the top left of the primary monitor
driver.manage().window().setPosition(new Point(0, 0));
  
# Move the window to the top left of the primary monitor
driver.set_window_position(0, 0)
  
// Move the window to the top left of the primary monitor
driver.Manage().Window.Position = new Point(0, 0);
  
driver.manage.window.move_to(0,0)
  
// Move the window to the top left of the primary monitor
await driver.manage().window().setRect({ x: 0, y: 0 });
  
// Move the window to the top left of the primary monitor
driver.manage().window().position = Point(0,0)
    

Maximize window

Enlarges the window. For most operating systems, the window will fill the screen, without blocking the operating system’s own menus and toolbars.

driver.manage().window().maximize();
driver.maximize_window()
driver.Manage().Window.Maximize();
driver.manage.window.maximize
await driver.manage().window().maximize();
driver.manage().window().maximize()

Minimize window

Minimizes the window of current browsing context. The exact behavior of this command is specific to individual window managers.

Minimize Window typically hides the window in the system tray.

Note: This feature works with Selenium 4 and later versions.

driver.manage().window().minimize();
driver.minimize_window()
driver.Manage().Window.Minimize();
driver.manage.window.minimize
await driver.manage().window().minimize();
driver.manage().window().minimize()

Fullscreen window

Fills the entire screen, similar to pressing F11 in most browsers.

driver.manage().window().fullscreen();
driver.fullscreen_window()
driver.Manage().Window.FullScreen();
driver.manage.window.full_screen
await driver.manage().window().fullscreen();
driver.manage().window().fullscreen()

TakeScreenshot

Used to capture screenshot for current browsing context. The WebDriver endpoint screenshot returns screenshot which is encoded in Base64 format.

import org.apache.commons.io.FileUtils;
import org.openqa.selenium.chrome.ChromeDriver;
import java.io.*;
import org.openqa.selenium.*;

public class SeleniumTakeScreenshot {
    public static void main(String args[]) throws IOException {
        WebDriver driver = new ChromeDriver();
        driver.get("http://www.example.com");
        File scrFile = ((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);
        FileUtils.copyFile(scrFile, new File("./image.png"));
        driver.quit();
    }
}
  
from selenium import webdriver

driver = webdriver.Chrome()

# Navigate to url
driver.get("http://www.example.com")

# Returns and base64 encoded string into image
driver.save_screenshot('./image.png')

driver.quit()
    using OpenQA.Selenium;
    using OpenQA.Selenium.Chrome;
    using OpenQA.Selenium.Support.UI;

    var driver = new ChromeDriver();
    driver.Navigate().GoToUrl("http://www.example.com");
    Screenshot screenshot = (driver as ITakesScreenshot).GetScreenshot();
    screenshot.SaveAsFile("screenshot.png", ScreenshotImageFormat.Png); // Format values are Bmp, Gif, Jpeg, Png, Tiff
  
require 'selenium-webdriver'
driver = Selenium::WebDriver.for :chrome

begin
  driver.get 'https://example.com/'

  # Takes and Stores the screenshot in specified path
  driver.save_screenshot('./image.png')

end
  
let {Builder} = require('selenium-webdriver');
let fs = require('fs');

(async function example() {
    let driver = await new Builder()
      .forBrowser('chrome')
      .build();

    await driver.get('https://www.example.com');
    // Returns base64 encoded string
    let encodedString = await driver.takeScreenshot();
    await fs.writeFileSync('./image.png', encodedString, 'base64');
    await driver.quit();
}())
  
import com.oracle.tools.packager.IOUtils.copyFile
import org.openqa.selenium.*
import org.openqa.selenium.chrome.ChromeDriver
import java.io.File

fun main(){
    val driver =  ChromeDriver()
    driver.get("https://www.example.com")
    val scrFile = (driver as TakesScreenshot).getScreenshotAs<File>(OutputType.FILE)
    copyFile(scrFile, File("./image.png"))
    driver.quit()
}
   

TakeElementScreenshot

Used to capture screenshot of an element for current browsing context. The WebDriver endpoint screenshot returns screenshot which is encoded in Base64 format.

import org.apache.commons.io.FileUtils;
import org.openqa.selenium.*;
import org.openqa.selenium.chrome.ChromeDriver;
import java.io.File;
import java.io.IOException;

public class SeleniumelementTakeScreenshot {
  public static void main(String args[]) throws IOException {
    WebDriver driver = new ChromeDriver();
    driver.get("https://www.example.com");
    WebElement element = driver.findElement(By.cssSelector("h1"));
    File scrFile = element.getScreenshotAs(OutputType.FILE);
    FileUtils.copyFile(scrFile, new File("./image.png"));
    driver.quit();
  }
}
   
from selenium import webdriver
from selenium.webdriver.common.by import By

driver = webdriver.Chrome()

# Navigate to url
driver.get("http://www.example.com")

ele = driver.find_element(By.CSS_SELECTOR, 'h1')

# Returns and base64 encoded string into image
ele.screenshot('./image.png')

driver.quit()
  
    using OpenQA.Selenium;
    using OpenQA.Selenium.Chrome;
    using OpenQA.Selenium.Support.UI;

    // Webdriver
    var driver = new ChromeDriver();
    driver.Navigate().GoToUrl("http://www.example.com");

    // Fetch element using FindElement
    var webElement = driver.FindElement(By.CssSelector("h1"));

    // Screenshot for the element
    var elementScreenshot = (webElement as ITakesScreenshot).GetScreenshot();
    elementScreenshot.SaveAsFile("screenshot_of_element.png");
  
# Works with Selenium4-alpha7 Ruby bindings and above
require 'selenium-webdriver'
driver = Selenium::WebDriver.for :chrome

begin
  driver.get 'https://example.com/'
  ele = driver.find_element(:css, 'h1')

  # Takes and Stores the element screenshot in specified path
  ele.save_screenshot('./image.jpg')
end
  
const {Builder, By} = require('selenium-webdriver');
let fs = require('fs');

(async function example() {
   let driver = await new Builder()
       .forBrowser('chrome')
       .build();

   await driver.get('https://www.example.com');
   let ele = await driver.findElement(By.css("h1"));
   // Captures the element screenshot
   let encodedString = await ele.takeScreenshot(true);
   await fs.writeFileSync('./image.png', encodedString, 'base64');
   await driver.quit();
}())
  
import org.apache.commons.io.FileUtils
import org.openqa.selenium.chrome.ChromeDriver
import org.openqa.selenium.*
import java.io.File

fun main() {
    val driver = ChromeDriver()
    driver.get("https://www.example.com")
    val element = driver.findElement(By.cssSelector("h1"))
    val scrFile: File = element.getScreenshotAs(OutputType.FILE)
    FileUtils.copyFile(scrFile, File("./image.png"))
    driver.quit()
}
  

Execute Script

Executes JavaScript code snippet in the current context of a selected frame or window.

    //Creating the JavascriptExecutor interface object by Type casting
      JavascriptExecutor js = (JavascriptExecutor)driver;
    //Button Element
      WebElement button =driver.findElement(By.name("btnLogin"));
    //Executing JavaScript to click on element
      js.executeScript("arguments[0].click();", button);
    //Get return value from script
      String text = (String) js.executeScript("return arguments[0].innerText", button);
    //Executing JavaScript directly
      js.executeScript("console.log('hello world')");
  
# Stores the header element
header = driver.find_element(By.CSS_SELECTOR, "h1")

# Executing JavaScript to capture innerText of header element
driver.execute_script('return arguments[0].innerText', header)
  
    //creating Chromedriver instance
	IWebDriver driver = new ChromeDriver();
	//Creating the JavascriptExecutor interface object by Type casting
	IJavaScriptExecutor js = (IJavaScriptExecutor) driver;
	//Button Element
	IWebElement button = driver.FindElement(By.Name("btnLogin"));
	//Executing JavaScript to click on element
	js.ExecuteScript("arguments[0].click();", button);
	//Get return value from script
	String text = (String)js.ExecuteScript("return arguments[0].innerText", button);
	//Executing JavaScript directly
	js.ExecuteScript("console.log('hello world')");
  
# Stores the header element
header = driver.find_element(css: 'h1')

# Get return value from script
result = driver.execute_script("return arguments[0].innerText", header)

# Executing JavaScript directly
driver.execute_script("alert('hello world')")
  
// Stores the header element
let header = await driver.findElement(By.css('h1'));

// Executing JavaScript to capture innerText of header element
let text = await driver.executeScript('return arguments[0].innerText', header);
  
// Stores the header element
val header = driver.findElement(By.cssSelector("h1"))

// Get return value from script
val result = driver.executeScript("return arguments[0].innerText", header)

// Executing JavaScript directly
driver.executeScript("alert('hello world')")
  

Prints the current page within the browser

Note: This requires Chromium Browsers to be in headless mode

    import org.openqa.selenium.print.PrintOptions;

    driver.get("https://www.selenium.dev");
    printer = (PrintsPage) driver;

    PrintOptions printOptions = new PrintOptions();
    printOptions.setPageRanges("1-2");

    Pdf pdf = printer.print(printOptions);
    String content = pdf.getContent();
  
    from selenium.webdriver.common.print_page_options import PrintOptions

    print_options = PrintOptions()
    print_options.page_ranges = ['1-2']

    driver.get("printPage.html")

    base64code = driver.print_page(print_options)
  
    // code sample not available please raise a PR
  
    driver.navigate_to 'https://www.selenium.dev'

    base64encodedContent = driver.print_page(orientation: 'landscape')
  
 
  const {Builder} = require('selenium-webdriver');
  const chrome = require('selenium-webdriver/chrome');
  let opts = new chrome.Options();
  let fs = require('fs');
  (async function example() {
    let driver = new Builder()
      .forBrowser('chrome')
      .setChromeOptions(opts.headless())
      .build();
    await driver.get('https://www.selenium.dev');
    try {
      let base64 = await driver.printPage({pageRanges:["1-2"]});
      await fs.writeFileSync('./test.pdf', base64, 'base64');
    } catch (e) {
    console.log(e)
    }
    await driver.quit();
  })();
  
    driver.get("https://www.selenium.dev")
    val printer = driver as PrintsPage

    val printOptions = PrintOptions()
    printOptions.setPageRanges("1-2")
    
    val pdf: Pdf = printer.print(printOptions)
    val content = pdf.content
  

3 - Elemente lokalisieren

Locating one element

Eine der grundlegendsten Techniken, die bei der Verwendung des WebDriver erlernt werden müssen, ist wie man Elemente auf der Webseite findet. WebDriver bietet eine Reihe von verschiedenen Möglichkeiten um Elemente zu finden, darunter die Suche nach einem Element anhand des ID-Attributs:

WebElement cheese = driver.findElement(By.id("cheese"));
  
driver.find_element(By.ID, "cheese")
  
IWebElement element = driver.FindElement(By.Id("cheese"));
  
cheese = driver.find_element(id: 'cheese')
  
const cheese = driver.findElement(By.id('cheese'));
  
val cheese: WebElement = driver.findElement(By.id("cheese"))
  

Wie das Beispiel zeigt, wird die Lokalisierung der Elemente mit dem WebDriver direkt an einer Instanz des WebDriver Objektes durchgeführt. Die findElement(By) Methode liefert ein Objekt des Types ẀebElement.

  • WebDriver repräsentiert den Browser
  • WebElement repräsentiert einen bestimmten DOM Knoten (z.B. einen Link, ein Eingabefeld, etc.)

Ab dem Zeitpunkt, ab dem eine Referenz zu einem WebElement “gefunden” wurde, kann der Suchumfang auf dieses Element eingeschränkt werden. Es können weitere eingegrenzte Suchen auf Basis des ausgewählten Elements durchgeführt werden, indem die gleiche Methode angewandt wird:

WebElement cheese = driver.findElement(By.id("cheese"));
WebElement cheddar = cheese.findElement(By.id("cheddar"));
  
cheese = driver.find_element(By.ID, "cheese")
cheddar = cheese.find_elements_by_id("cheddar")
  
IWebElement cheese = driver.FindElement(By.Id("cheese"));
IWebElement cheddar = cheese.FindElement(By.Id("cheddar"));
  
cheese = driver.find_element(id: 'cheese')
cheddar = cheese.find_element(id: 'cheddar')
  
const cheese = driver.findElement(By.id('cheese'));
const cheddar = cheese.findElement(By.id('cheddar'));
  
val cheese = driver.findElement(By.id("cheese"))
val cheddar = cheese.findElement(By.id("cheddar"))
  

Dies wird ermöglicht weil sowohl der WebDriver als auch das WebElement das Interface SearchContext implementieren. Wir verstehen dies im WebDriver als role-based interface (rollenbasiertes Interface). Dieses Interface ermöglicht um herauszufinden ob eine driver Implementierung ein bestimmtes Feature unterstützt oder nicht. Diese Schnittstellen (Interface) sind klar definiert und versuchen daran festzuhalten, dass es nur eine Verantwortlichkeit dafür gibt. Mehr über den Aufbau und die Verantwortlichkeiten der Driver können hier nachgelesen werden Link zu einer Sektion die noch definiert werden muss

Folglich untersützt das By Interface zahlreich zusätzliche Suchstrategien. Eine verschachtelte Suche ist nicht die effektivste Methode um die den gewünschten Käse zu finden. Es werden zwei getrennte Befehle an den Browser gesendet. Der erste der den gesamten DOM nach dem Element mit der ID “cheese” sucht, gefolgt von der Suche nach “cheddar” mit einem eingeschränkten Kontext.

Um die Effektivität zu erhöhen sollte ein präziserer Locator (Identifizierungsstrategie) gewählt werden; WebDriver unterstützt die Suche nach Elementen auch mit Hilfe eines CSS-locators, mit dem es auch möglich ist Kombinationen in einer einzelnen Suche durchzuführen:

driver.findElement(By.cssSelector("#cheese #cheddar"));
  
cheddar = driver.find_element_by_css_selector("#cheese #cheddar")
  
driver.FindElement(By.CssSelector("#cheese #cheddar"));
  
driver.find_element(css: '#cheese #cheddar')
  
const cheddar = driver.findElement(By.css('#cheese #cheddar'));
  
driver.findElement(By.cssSelector("#cheese #cheddar"))
  

Finden mehrerer Elemente

Angenommen das Dokument in dem wir suchen wollen beinhaltet eine sortierte Liste mit Käsesorten die uns am besten schmecken:

<ol id=cheese>
 <li id=cheddar><li id=brie><li id=rochefort><li id=camembert></ol>

Es steht außer Frage, je mehr Käse desto besser, es wäre aber umständlich jedes Element einzeln abrufen zu müssen. Daher gibt es die Möglichkeit mit findElements(By) mehrere Elemente gleichzeitig zu finden. Diese Methode liefert eine Sammlung (Collection) von WebElementen. Wird nur ein Element gefunden, wird trotzdem eine Sammlung (mit einem Element) retourniert. Wird kein Element gefunden ist die Liste leer.

List<WebElement> muchoCheese = driver.findElements(By.cssSelector("#cheese li"));
  
mucho_cheese = driver.find_elements_by_css_selector("#cheese li")
  
IReadOnlyList<IWebElement> muchoCheese = driver.FindElements(By.CssSelector("#cheese li"));
  
mucho_cheese = driver.find_elements(css: '#cheese li')
  
const muchoCheese = driver.findElements(By.css('#cheese li'));
  
val muchoCheese: List<WebElement>  = driver.findElements(By.cssSelector("#cheese li"))
  

Strategien der Elementsuche

Im WebDriver existieren acht unterschiedliche Möglichkeiten um Elemente zu lokalisieren:

Lokator/Suchmethode (locator)Beschreibung
class nameLokalisiert Elemente mit dem gewünschten Klassennamen (Zusammengesetzte Klassennamen sind nicht erlaubt)
css selectorLokalisiert Elemente die dem CSS-Selektor entsprechen
idLokalisiert Elemente deren ID dem Suchwert entsprechen
nameLokalisiert Elemente die den entsprechenden Wert im NAME Attribut haben
link textLokalisiert Link-Elemente deren sichtbarer Text dem Suchwert entsprechen
partial link textLokalisiert Link-Elemente die den Suchwert im sichtbaren Text vorkommt
tag nameLokalisiert Elemente mit den entsprechenden HTML-Tags
xpathLokalisiert Elemente die auf dem xpath-Selektor entsprechen

Tips zur Verwendung von Selektoren

Die bevorzugte Methode um Elemente zu identifizieren ist mit Sicherheit mit Hilfe der HTML IDs. Diese sind eindeutig, konsitent und vorhersehbar, weiters arbeitet diese Methode sehr schnell, da hierbei auf komplizierte DOM Verarbeitungen verzichtet wird.

Wenn eindeutige IDs nicht verfügbar sind, ist ein gut definierter CSS selector die bevorzugte Methode um Elemente zu lokalisieren. XPath-Suchen funktionieren gleich dem CSS-Selektoren, allerdings ist die Syntax komplizierter und schwieriger zu debuggen. Obwohl XPath-Selektoren sehr flexibel sind, sind sie in der Regel nicht von den Browser-Herstellern auf Leistung getestet und sind tendenziell recht langsam.

Selektorstrategien die linkText oder partialLinkText verwenden haben den Nachteil das diese nur für Link-Elemente angewandt werden können. Weiters werden diese Selektoren intern im WebDriver als XPath-Selektoren aufgelöst.

Den HTML-Tag als Identifizierungsmerkmal zu verwenden kann gefährlich sein. Meistens sind viele Elemente mit dem gleichen HTML-Tag auf einer Webseite. Eine sinnvolle Verwendung könnte sein, diese Strategie mit der findElements(By) Methode zu verwenden, die eine Sammlung von WebElementen retourniert.

Empfohlen wird die Suchen so kompackt und einfach lesbar wie möglich zu halten. Den DOM abzufragen ist eine aufwändige Operation für den WebDriver, und je präziser der Suchbegriff ist, desto besser.

Relative Suchstrategien

Selenium 4 führt relative Locators ein, die zuvor als Friendly Locators bekannt waren. Diese Funktionalität wurde hinzugefügt um Elemente zu finden, die sicht in der Nähe zu anderen Elementen befinden. Folgende relative Locators sind verfügbar:

  • above (oberhalb)
  • below (unterhalb)
  • toLeftOf (links)
  • toRightOf (rechts)
  • near (nahe/nächst)

Die findElement Methode akzeptiert nun eine weitere Möglichkeit with(By) die einen relativen Locator liefert.

Wie funktionieren die relativen Suchemethoden

Selenium verwendet folgende JavaScript Funktion getBoundingClientRect() um das entsprechende Element zu finden. Diese Funktion retourniert Eigenschaften eines Elements wie z.B right, left, bottom und top (links, rechts, oben, unten)

Betrachten wir das folgende Beispiel um die Funktionalität der relativen Locators besser zu verstehen:

Relative Locators

above() - oberhalb

Liefert das WebElement, welches sich über dem spezifiziertem Element befindet.

import static org.openqa.selenium.support.locators.RelativeLocator.with;

WebElement passwordField = driver.findElement(By.id("password"));
WebElement emailAddressField = driver.findElement(with(By.tagName("input"))
.above(passwordField));
from selenium.webdriver.common.by import By
from selenium.webdriver.support.relative_locator import locate_with

passwordField = driver.find_element(By.ID, "password")
emailAddressField = driver.find_element(locate_with(By.TAG_NAME, "input").above(passwordField))
using static OpenQA.Selenium.RelativeBy;

IWebElement passwordField = driver.FindElement(By.Id("password"));
IWebElement emailAddressField = driver.FindElement(RelativeBy.WithLocator(By.TagName("input")).Above(passwordField));
password_field= driver.find_element(:id, "password")
email_address_field = driver.find_element(relative: {tag_name: 'input', above:password_field})
let passwordField = driver.findElement(By.id('password'));
let emailAddressField = await driver.findElement(locateWith(By.tagName('input')).above(passwordField));
val passwordField = driver.findElement(By.id("password"))
val emailAddressField = driver.findElement(with(By.tagName("input")).above(passwordField))

below() - unterhalb

Findet das WebElement, welches sich unter dem spezifiziertem Element befindet.

import static org.openqa.selenium.support.locators.RelativeLocator.with;

WebElement emailAddressField = driver.findElement(By.id("email"));
WebElement passwordField = driver.findElement(with(By.tagName("input"))
.below(emailAddressField));
from selenium.webdriver.common.by import By
from selenium.webdriver.support.relative_locator import locate_with

emailAddressField = driver.find_element(By.ID, "email")
passwordField = driver.find_element(locate_with(By.TAG_NAME, "input").below(emailAddressField))
using static OpenQA.Selenium.RelativeBy;

IWebElement emailAddressField = driver.FindElement(By.Id("email"));
IWebElement passwordField = driver.FindElement(RelativeBy.WithLocator(By.TagName("input")).Below(emailAddressField));
email_address_field = driver.find_element(:id, "email")
password_field = driver.find_element(relative: {tag_name: 'input', below: email_address_field})
let emailAddressField = driver.findElement(By.id('email'));
let passwordField = await driver.findElement(locateWith(By.tagName('input')).below(emailAddressField));
val emailAddressField = driver.findElement(By.id("email"))
val passwordField = driver.findElement(with(By.tagName("input")).below(emailAddressField))

Liefert das WebElement, welches sich links vom spezifizierten Element befindet.

import static org.openqa.selenium.support.locators.RelativeLocator.with;

WebElement submitButton = driver.findElement(By.id("submit"));
WebElement cancelButton = driver.findElement(with(By.tagName("button"))
.toLeftOf(submitButton));
from selenium.webdriver.common.by import By
from selenium.webdriver.support.relative_locator import locate_with

submitButton = driver.find_element(By.ID, "submit")
cancelButton = driver.find_element(locate_with(By.TAG_NAME, "button").
to_left_of(submitButton))
using static OpenQA.Selenium.RelativeBy;

IWebElement submitButton = driver.FindElement(By.Id("submit"));
IWebElement cancelButton = driver.FindElement(RelativeBy.WithLocator(By.TagName("button")).LeftOf(submitButton));
submit_button= driver.find_element(:id, "submit")
cancel_button = driver.find_element(relative: {tag_name: 'button', left:submit_button})
let submitButton = driver.findElement(By.id('submit'));
let cancelButton = await driver.findElement(locateWith(By.tagName('button')).toLeftOf(submitButton));
val submitButton = driver.findElement(By.id("submit"))
val cancelButton = driver.findElement(with(By.tagName("button")).toLeftOf(submitButton))

toRightOf() - rechts davon

Liefert das WebElement, das sich rechts des spezifierten Elements befindet.

import static org.openqa.selenium.support.locators.RelativeLocator.with;

WebElement cancelButton = driver.findElement(By.id("cancel"));
WebElement submitButton = driver.findElement(with(By.tagName("button")).toRightOf(cancelButton));
from selenium.webdriver.common.by import By
from selenium.webdriver.support.relative_locator import locate_with

cancelButton = driver.find_element(By.ID, "cancel")
submitButton = driver.find_element(locate_with(By.TAG_NAME, "button").
to_right_of(cancelButton))
using static OpenQA.Selenium.RelativeBy;

IWebElement cancelButton = driver.FindElement(By.Id("cancel"));
IWebElement submitButton = driver.FindElement(RelativeBy.WithLocator(By.TagName("button")).RightOf(cancelButton));
cancel_button = driver.find_element(:id, "cancel")
submit_button = driver.find_element(relative: {tag_name: 'button', right:cancel_button})
let cancelButton = driver.findElement(By.id('cancel'));
let submitButton = await driver.findElement(locateWith(By.tagName('button')).toRightOf(cancelButton));
val cancelButton = driver.findElement(By.id("cancel"))
val submitButton = driver.findElement(with(By.tagName("button")).toRightOf(cancelButton))

near() - in der Nähe von

Liefert das WebElement, welches maximal 50px vom spezifizierten Element entfernt ist.

import static org.openqa.selenium.support.locators.RelativeLocator.with;

WebElement emailAddressLabel = driver.findElement(By.id("lbl-email"));
WebElement emailAddressField = driver.findElement(with(By.tagName("input")).near(emailAddressLabel));
from selenium.webdriver.common.by import By
from selenium.webdriver.support.relative_locator import locate_with

emailAddressLabel = driver.find_element(By.ID, "lbl-email")
emailAddressField = driver.find_element(locate_with(By.TAG_NAME, "input").
near(emailAddressLabel))
using static OpenQA.Selenium.RelativeBy;

IWebElement emailAddressLabel = driver.FindElement(By.Id("lbl-email"));
IWebElement emailAddressField = driver.FindElement(RelativeBy.WithLocator(By.TagName("input")).Near(emailAddressLabel));
email_address_label = driver.find_element(:id, "lbl-email")
email_address_field = driver.find_element(relative: {tag_name: 'input', near: email_address_label})
let emailAddressLabel = driver.findElement(By.id("lbl-email"));
let emailAddressField = await driver.findElement(locateWith(By.tagName("input")).near(emailAddressLabel));
val emailAddressLabel = driver.findElement(By.id("lbl-email"))
val emailAddressField = driver.findElement(with(By.tagName("input")).near(emailAddressLabel))

4 - Waits

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WebDriver can generally be said to have a blocking API. Because it is an out-of-process library that instructs the browser what to do, and because the web platform has an intrinsically asynchronous nature, WebDriver does not track the active, real-time state of the DOM. This comes with some challenges that we will discuss here.

From experience, most intermittent issues that arise from use of Selenium and WebDriver are connected to race conditions that occur between the browser and the user’s instructions. An example could be that the user instructs the browser to navigate to a page, then gets a no such element error when trying to find an element.

Consider the following document:

<!doctype html>
<meta charset=utf-8>
<title>Race Condition Example</title>

<script>
  var initialised = false;
  window.addEventListener("load", function() {
    var newElement = document.createElement("p");
    newElement.textContent = "Hello from JavaScript!";
    document.body.appendChild(newElement);
    initialised = true;
  });
</script>

The WebDriver instructions might look innocent enough:

driver.get("file:///race_condition.html");
WebElement element = driver.findElement(By.tagName("p"));
assertEquals(element.getText(), "Hello from JavaScript!");
  
driver.navigate("file:///race_condition.html")
el = driver.find_element(By.TAG_NAME, "p")
assert el.text == "Hello from JavaScript!"
  
driver.Navigate().GoToUrl("file:///race_condition.html");
IWebElement element = driver.FindElement(By.TagName("p"));
assertEquals(element.Text, "Hello from JavaScript!");
  
require 'selenium-webdriver'
driver = Selenium::WebDriver.for :firefox
begin
  # Navigate to URL
  driver.get 'file:///race_condition.html'

  # Get and store Paragraph Text
  search_form = driver.find_element(:css,'p').text

  "Hello from JavaScript!".eql? search_form
ensure
  driver.quit
end
  
await driver.get('file:///race_condition.html');
const element = driver.findElement(By.css('p'));
assert.strictEqual(await element.getText(), 'Hello from JavaScript!');
  
driver.get("file:///race_condition.html")
val element = driver.findElement(By.tagName("p"))
assert(element.text == "Hello from JavaScript!")
  

The issue here is that the default page load strategy used in WebDriver listens for the document.readyState to change to "complete" before returning from the call to navigate. Because the p element is added after the document has completed loading, this WebDriver script might be intermittent. It “might” be intermittent because no guarantees can be made about elements or events that trigger asynchronously without explicitly waiting—or blocking—on those events.

Fortunately, the normal instruction set available on the WebElement interface—such as WebElement.click and WebElement.sendKeys—are guaranteed to be synchronous, in that the function calls will not return (or the callback will not trigger in callback-style languages) until the command has been completed in the browser. The advanced user interaction APIs, Keyboard and Mouse, are exceptions as they are explicitly intended as “do what I say” asynchronous commands.

Waiting is having the automated task execution elapse a certain amount of time before continuing with the next step.

To overcome the problem of race conditions between the browser and your WebDriver script, most Selenium clients ship with a wait package. When employing a wait, you are using what is commonly referred to as an explicit wait.

Explicit wait

Explicit waits are available to Selenium clients for imperative, procedural languages. They allow your code to halt program execution, or freeze the thread, until the condition you pass it resolves. The condition is called with a certain frequency until the timeout of the wait is elapsed. This means that for as long as the condition returns a falsy value, it will keep trying and waiting.

Since explicit waits allow you to wait for a condition to occur, they make a good fit for synchronising the state between the browser and its DOM, and your WebDriver script.

To remedy our buggy instruction set from earlier, we could employ a wait to have the findElement call wait until the dynamically added element from the script has been added to the DOM:

WebDriver driver = new ChromeDriver();
driver.get("https://google.com/ncr");
driver.findElement(By.name("q")).sendKeys("cheese" + Keys.ENTER);
// Initialize and wait till element(link) became clickable - timeout in 10 seconds
WebElement firstResult = new WebDriverWait(driver, Duration.ofSeconds(10))
        .until(ExpectedConditions.elementToBeClickable(By.xpath("//a/h3")));
// Print the first result
System.out.println(firstResult.getText());
  
from selenium.webdriver.support.ui import WebDriverWait
def document_initialised(driver):
    return driver.execute_script("return initialised")

driver.navigate("file:///race_condition.html")
WebDriverWait(driver).until(document_initialised)
el = driver.find_element(By.TAG_NAME, "p")
assert el.text == "Hello from JavaScript!"
  
driver = new ChromeDriver();
driver.Url = "https://www.google.com/ncr";
driver.FindElement(By.Name("q")).SendKeys("cheese" + Keys.Enter);
            
WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(10));
IWebElement firstResult = wait.Until(e => e.FindElement(By.XPath("//a/h3")));

Console.WriteLine(firstResult.Text);
  
require 'selenium-webdriver'
driver = Selenium::WebDriver.for :firefox
wait = Selenium::WebDriver::Wait.new(:timeout => 10)

def document_initialised(driver)
  driver.execute_script('return initialised')
end

begin
  driver.get 'file:///race_condition.html'
  wait.until{document_initialised driver}
  search_form = driver.find_element(:css,'p').text
  "Hello from JavaScript!".eql? search_form
ensure
  driver.quit
end
  
const documentInitialised = () =>
    driver.executeScript('return initialised');

await driver.get('file:///race_condition.html');
await driver.wait(() => documentInitialised(), 10000);
const element = driver.findElement(By.css('p'));
assert.strictEqual(await element.getText(), 'Hello from JavaScript!');
  
driver.get("https://google.com/ncr")
driver.findElement(By.name("q")).sendKeys("cheese" + Keys.ENTER)
// Initialize and wait till element(link) became clickable - timeout in 10 seconds
val firstResult = WebDriverWait(driver, Duration.ofSeconds(10))
      .until(ExpectedConditions.elementToBeClickable(By.xpath("//a/h3")))
// Print the first result
println(firstResult.text)
  

We pass in the condition as a function reference that the wait will run repeatedly until its return value is truthy. A “truthful” return value is anything that evaluates to boolean true in the language at hand, such as a string, number, a boolean, an object (including a WebElement), or a populated (non-empty) sequence or list. That means an empty list evaluates to false. When the condition is truthful and the blocking wait is aborted, the return value from the condition becomes the return value of the wait.

With this knowledge, and because the wait utility ignores no such element errors by default, we can refactor our instructions to be more concise:

WebElement foo = new WebDriverWait(driver, Duration.ofSeconds(3))
          .until(driver -> driver.findElement(By.name("q")));
assertEquals(foo.getText(), "Hello from JavaScript!"); 
  
from selenium.webdriver.support.ui import WebDriverWait

driver.navigate("file:///race_condition.html")
el = WebDriverWait(driver).until(lambda d: d.find_element_by_tag_name("p"))
assert el.text == "Hello from JavaScript!"
  
   using (var driver = new FirefoxDriver())
    {
        var foo = new WebDriverWait(driver, TimeSpan.FromSeconds(3))
                        .Until(drv => drv.FindElement(By.Name("q")));
        Debug.Assert(foo.Text.Equals("Hello from JavaScript!"));
    }
  
  driver.get 'file:///race_condition.html'
  wait = Selenium::WebDriver::Wait.new(:timeout => 10)
  ele = wait.until { driver.find_element(css: 'p')}
  foo = ele.text
  assert_match foo, 'Hello from JavaScript'
  
let ele = await driver.wait(until.elementLocated(By.css('p')),10000);
let foo = await ele.getText();
assert(foo == "Hello from JavaScript");
  
driver.get("file:///race_condition.html")
val ele = WebDriverWait(driver, Duration.ofSeconds(10))
            .until(ExpectedConditions.presenceOfElementLocated(By.tagName("p")))
assert(ele.text == "Hello from JavaScript!")
  

In that example, we pass in an anonymous function (but we could also define it explicitly as we did earlier so it may be reused). The first and only argument that is passed to our condition is always a reference to our driver object, WebDriver. In a multi-threaded environment, you should be careful to operate on the driver reference passed in to the condition rather than the reference to the driver in the outer scope.

Because the wait will swallow no such element errors that are raised when the element is not found, the condition will retry until the element is found. Then it will take the return value, a WebElement, and pass it back through to our script.

If the condition fails, e.g. a truthful return value from the condition is never reached, the wait will throw/raise an error/exception called a timeout error.

Options

The wait condition can be customised to match your needs. Sometimes it is unnecessary to wait the full extent of the default timeout, as the penalty for not hitting a successful condition can be expensive.

The wait lets you pass in an argument to override the timeout:

new WebDriverWait(driver, Duration.ofSeconds(3)).until(ExpectedConditions.elementToBeClickable(By.xpath("//a/h3")));
  
WebDriverWait(driver, timeout=3).until(some_condition)
  
new WebDriverWait(driver, TimeSpan.FromSeconds(3)).Until(ExpectedConditions.ElementToBeClickable(By.XPath("//a/h3")));
  
wait = Selenium::WebDriver::Wait.new(:timeout => 10)

wait.until { driver.find_element(:id, 'message').displayed? }
  
  await driver.wait(until.elementLocated(By.id('foo')), 30000);
  
WebDriverWait(driver, Duration.ofSeconds(3)).until(ExpectedConditions.elementToBeClickable(By.xpath("//a/h3")))
  

Expected conditions

Because it is quite a common occurrence to have to synchronise the DOM and your instructions, most clients also come with a set of predefined expected conditions. As might be obvious by the name, they are conditions that are predefined for frequent wait operations.

The conditions available in the different language bindings vary, but this is a non-exhaustive list of a few:

  • alert is present
  • element exists
  • element is visible
  • title contains
  • title is
  • element staleness
  • visible text

You can refer to the API documentation for each client binding to find an exhaustive list of expected conditions:

Implicit wait

There is a second type of wait that is distinct from explicit wait called implicit wait. By implicitly waiting, WebDriver polls the DOM for a certain duration when trying to find any element. This can be useful when certain elements on the webpage are not available immediately and need some time to load.

Implicit waiting for elements to appear is disabled by default and will need to be manually enabled on a per-session basis. Mixing explicit waits and implicit waits will cause unintended consequences, namely waits sleeping for the maximum time even if the element is available or condition is true.

Warning: Do not mix implicit and explicit waits. Doing so can cause unpredictable wait times. For example, setting an implicit wait of 10 seconds and an explicit wait of 15 seconds could cause a timeout to occur after 20 seconds.

An implicit wait is to tell WebDriver to poll the DOM for a certain amount of time when trying to find an element or elements if they are not immediately available. The default setting is 0, meaning disabled. Once set, the implicit wait is set for the life of the session.

WebDriver driver = new FirefoxDriver();
driver.manage().timeouts().implicitlyWait(Duration.ofSeconds(10));
driver.get("http://somedomain/url_that_delays_loading");
WebElement myDynamicElement = driver.findElement(By.id("myDynamicElement"));
  
driver = Firefox()
driver.implicitly_wait(10)
driver.get("http://somedomain/url_that_delays_loading")
my_dynamic_element = driver.find_element(By.ID, "myDynamicElement")
  
IWebDriver driver = new ChromeDriver();
driver.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(10);
driver.Url = "http://somedomain/url_that_delays_loading";
IWebElement dynamicElement = driver.FindElement(By.Name("dynamicElement"));
  
require 'selenium-webdriver'
driver = Selenium::WebDriver.for :firefox
driver.manage.timeouts.implicit_wait = 10

begin
  driver.get 'http://somedomain/url_that_delays_loading'
  search_form = driver.find_element(:id,'dynamic_element')
ensure
  driver.quit
end
  
(async function(){

// Apply timeout for 10 seconds
await driver.manage().setTimeouts( { implicit: 10000 } );

// Navigate to url
await driver.get('http://somedomain/url_that_delays_loading');

let webElement = driver.findElement(By.id("myDynamicElement"));

}());
  
val driver = FirefoxDriver()
driver.manage().timeouts().implicitlyWait(Duration.ofSeconds(10))
driver.get("http://somedomain/url_that_delays_loading")
val myDynamicElement = driver.findElement(By.id("myDynamicElement"))
  

FluentWait

FluentWait instance defines the maximum amount of time to wait for a condition, as well as the frequency with which to check the condition.

Users may configure the wait to ignore specific types of exceptions whilst waiting, such as NoSuchElementException when searching for an element on the page.

// Waiting 30 seconds for an element to be present on the page, checking
// for its presence once every 5 seconds.
Wait<WebDriver> wait = new FluentWait<WebDriver>(driver)
  .withTimeout(Duration.ofSeconds(30))
  .pollingEvery(Duration.ofSeconds(5))
  .ignoring(NoSuchElementException.class);

WebElement foo = wait.until(new Function<WebDriver, WebElement>() {
  public WebElement apply(WebDriver driver) {
    return driver.findElement(By.id("foo"));
  }
});
  
driver = Firefox()
driver.get("http://somedomain/url_that_delays_loading")
wait = WebDriverWait(driver, 10, poll_frequency=1, ignored_exceptions=[ElementNotVisibleException, ElementNotSelectableException])
element = wait.until(EC.element_to_be_clickable((By.XPATH, "//div")))
  
using (var driver = new FirefoxDriver())
{
  WebDriverWait wait = new WebDriverWait(driver, timeout: TimeSpan.FromSeconds(30))
  {
      PollingInterval = TimeSpan.FromSeconds(5),
  };
  wait.IgnoreExceptionTypes(typeof(NoSuchElementException));

  var foo = wait.Until(drv => drv.FindElement(By.Id("foo")));
}
  
require 'selenium-webdriver'
driver = Selenium::WebDriver.for :firefox
exception = Selenium::WebDriver::Error::NoSuchElementError

begin
  driver.get 'http://somedomain/url_that_delays_loading'
  wait = Selenium::WebDriver::Wait.new(timeout: 30, interval: 5, message: 'Timed out after 30 sec', ignore: exception)
  foo = wait.until { driver.find_element(id: 'foo')}
ensure
  driver.quit
end
  
const {Builder, until} = require('selenium-webdriver');

(async function example() {
    let driver = await new Builder().forBrowser('firefox').build();
    await driver.get('http://somedomain/url_that_delays_loading');
    // Waiting 30 seconds for an element to be present on the page, checking
    // for its presence once every 5 seconds.
    let foo = await driver.wait(until.elementLocated(By.id('foo')), 30000, 'Timed out after 30 seconds', 5000);
})();
  
val wait = FluentWait<WebDriver>(driver)
        .withTimeout(Duration.ofSeconds(30))
        .pollingEvery(Duration.ofSeconds(3))
        .ignoring(NoSuchElementException::class.java)

val foo = wait.until {it.findElement(By.id("foo")) }
  

5 - JavaScript alerts, prompts and confirmations

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WebDriver provides an API for working with the three types of native popup messages offered by JavaScript. These popups are styled by the browser and offer limited customisation.

Alerts

The simplest of these is referred to as an alert, which shows a custom message, and a single button which dismisses the alert, labelled in most browsers as OK. It can also be dismissed in most browsers by pressing the close button, but this will always do the same thing as the OK button. See an example alert.

WebDriver can get the text from the popup and accept or dismiss these alerts.

//Click the link to activate the alert
driver.findElement(By.linkText("See an example alert")).click();

//Wait for the alert to be displayed and store it in a variable
Alert alert = wait.until(ExpectedConditions.alertIsPresent());

//Store the alert text in a variable
String text = alert.getText();

//Press the OK button
alert.accept();
  
# Click the link to activate the alert
driver.find_element(By.LINK_TEXT, "See an example alert").click()

# Wait for the alert to be displayed and store it in a variable
alert = wait.until(expected_conditions.alert_is_present())

# Store the alert text in a variable
text = alert.text

# Press the OK button
alert.accept()
  
//Click the link to activate the alert
driver.FindElement(By.LinkText("See an example alert")).Click();

//Wait for the alert to be displayed and store it in a variable
IAlert alert = wait.Until(ExpectedConditions.AlertIsPresent());

//Store the alert text in a variable
string text = alert.Text;

//Press the OK button
alert.Accept();
  
# Click the link to activate the alert
driver.find_element(:link_text, 'See an example alert').click

# Store the alert reference in a variable
alert = driver.switch_to.alert

# Store the alert text in a variable
alert_text = alert.text

# Press on OK button
alert.accept
  
//Click the link to activate the alert
await driver.findElement(By.linkText('See an example alert')).click();

// Wait for the alert to be displayed
await driver.wait(until.alertIsPresent());

// Store the alert in a variable
let alert = await driver.switchTo().alert();

//Store the alert text in a variable
let alertText = await alert.getText();

//Press the OK button
await alert.accept();

// Note: To use await, the above code should be inside an async function
  
//Click the link to activate the alert
driver.findElement(By.linkText("See an example alert")).click()

//Wait for the alert to be displayed and store it in a variable
val alert = wait.until(ExpectedConditions.alertIsPresent())

//Store the alert text in a variable
val text = alert.getText()

//Press the OK button
alert.accept()
  

Confirm

A confirm box is similar to an alert, except the user can also choose to cancel the message. See a sample confirm.

This example also shows a different approach to storing an alert:

//Click the link to activate the alert
driver.findElement(By.linkText("See a sample confirm")).click();

//Wait for the alert to be displayed
wait.until(ExpectedConditions.alertIsPresent());

//Store the alert in a variable
Alert alert = driver.switchTo().alert();

//Store the alert in a variable for reuse
String text = alert.getText();

//Press the Cancel button
alert.dismiss();
  
# Click the link to activate the alert
driver.find_element(By.LINK_TEXT, "See a sample confirm").click()

# Wait for the alert to be displayed
wait.until(expected_conditions.alert_is_present())

# Store the alert in a variable for reuse
alert = driver.switch_to.alert

# Store the alert text in a variable
text = alert.text

# Press the Cancel button
alert.dismiss()
  
//Click the link to activate the alert
driver.FindElement(By.LinkText("See a sample confirm")).Click();

//Wait for the alert to be displayed
wait.Until(ExpectedConditions.AlertIsPresent());

//Store the alert in a variable
IAlert alert = driver.SwitchTo().Alert();

//Store the alert in a variable for reuse
string text = alert.Text;

//Press the Cancel button
alert.Dismiss();
  
# Click the link to activate the alert
driver.find_element(:link_text, 'See a sample confirm').click

# Store the alert reference in a variable
alert = driver.switch_to.alert

# Store the alert text in a variable
alert_text = alert.text

# Press on Cancel button
alert.dismiss
  
//Click the link to activate the alert
await driver.findElement(By.linkText('See a sample confirm')).click();

// Wait for the alert to be displayed
await driver.wait(until.alertIsPresent());

// Store the alert in a variable
let alert = await driver.switchTo().alert();

//Store the alert text in a variable
let alertText = await alert.getText();

//Press the Cancel button
await alert.dismiss();

// Note: To use await, the above code should be inside an async function
  
//Click the link to activate the alert
driver.findElement(By.linkText("See a sample confirm")).click()

//Wait for the alert to be displayed
wait.until(ExpectedConditions.alertIsPresent())

//Store the alert in a variable
val alert = driver.switchTo().alert()

//Store the alert in a variable for reuse
val text = alert.text

//Press the Cancel button
alert.dismiss()
  

Prompt

Prompts are similar to confirm boxes, except they also include a text input. Similar to working with form elements, you can use WebDriver’s send keys to fill in a response. This will completely replace the placeholder text. Pressing the cancel button will not submit any text. See a sample prompt.

//Click the link to activate the alert
driver.findElement(By.linkText("See a sample prompt")).click();

//Wait for the alert to be displayed and store it in a variable
Alert alert = wait.until(ExpectedConditions.alertIsPresent());

//Type your message
alert.sendKeys("Selenium");

//Press the OK button
alert.accept();
  
# Click the link to activate the alert
driver.find_element(By.LINK_TEXT, "See a sample prompt").click()

# Wait for the alert to be displayed
wait.until(expected_conditions.alert_is_present())

# Store the alert in a variable for reuse
alert = Alert(driver)

# Type your message
alert.send_keys("Selenium")

# Press the OK button
alert.accept()
  
//Click the link to activate the alert
driver.FindElement(By.LinkText("See a sample prompt")).Click();

//Wait for the alert to be displayed and store it in a variable
IAlert alert = wait.Until(ExpectedConditions.AlertIsPresent());

//Type your message
alert.SendKeys("Selenium");

//Press the OK button
alert.Accept();
  
# Click the link to activate the alert
driver.find_element(:link_text, 'See a sample prompt').click

# Store the alert reference in a variable
alert = driver.switch_to.alert

# Type a message
alert.send_keys("selenium")

# Press on Ok button
alert.accept
  
//Click the link to activate the alert
await driver.findElement(By.linkText('See a sample prompt')).click();

// Wait for the alert to be displayed
await driver.wait(until.alertIsPresent());

// Store the alert in a variable
let alert = await driver.switchTo().alert();

//Type your message
await alert.sendKeys("Selenium");

//Press the OK button
await alert.accept();

//Note: To use await, the above code should be inside an async function
  
//Click the link to activate the alert
driver.findElement(By.linkText("See a sample prompt")).click()

//Wait for the alert to be displayed and store it in a variable
val alert = wait.until(ExpectedConditions.alertIsPresent())

//Type your message
alert.sendKeys("Selenium")

//Press the OK button
alert.accept()
  

6 - Http Proxies

Ein Proxy-Server fungiert als Zwischenstation für Anfragen zwischen Client und Server. Simpel erklärt werden die Daten über den Proxy zu der gewünschten Internetadresse und wieder retour geleitet.

Ein Proxy Server für die automatisierten Selenium-Skripte kann hilfreich sein bei:

  • Aufzeichnen des Netzwerkverkehrs
  • Mocken von Backend-Aufrufen die von der Website abgesetzt werden
  • Zugriff auf die gewünschte Website unter komplexen Netzwerkbedingungen oder strengen Einschränkungen.

Hat man Probleme bei der Verbindung zu einer URL aus einem Unternehmensnetzwerk, deutet das meistens darauf hin, dass es notwendig ist die Verbindung über einen Proxy herzustellen.

Der Selenium WebDriver stellt die Möglichkeit zur Verfügung um Proxyeinstellungen vorzunehmen:

import org.openqa.selenium.Proxy;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.chrome.ChromeOptions;

public class proxyTest {
  public static void main(String[] args) {
    Proxy proxy = new Proxy();
    proxy.setHttpProxy("<HOST:PORT>");
    ChromeOptions options = new ChromeOptions();
    options.setCapability("proxy", proxy);
    WebDriver driver = new ChromeDriver(options);
    driver.get("https://www.google.com/");
    driver.manage().window().maximize();
    driver.quit();
  }
}
  
from selenium import webdriver

PROXY = "<HOST:PORT>"
webdriver.DesiredCapabilities.FIREFOX['proxy'] = {
    "httpProxy": PROXY,
    "ftpProxy": PROXY,
    "sslProxy": PROXY,
    "proxyType": "MANUAL",

}

with webdriver.Firefox() as driver:
    # Open URL
    driver.get("https://selenium.dev")

  
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;

public class ProxyTest{
  public static void Main() {
    ChromeOptions options = new ChromeOptions();
    Proxy proxy = new Proxy();
    proxy.Kind = ProxyKind.Manual;
    proxy.IsAutoDetect = false;
    proxy.SslProxy = "<HOST:PORT>";
    options.Proxy = proxy;
    options.AddArgument("ignore-certificate-errors");
    IWebDriver driver = new ChromeDriver(options);
    driver.Navigate().GoToUrl("https://www.selenium.dev/");
  }
}
  
# this code was written with Selenium 4

proxy = Selenium::WebDriver::Proxy.new(http: '<HOST:PORT>')
cap   = Selenium::WebDriver::Remote::Capabilities.chrome(proxy: proxy)

driver = Selenium::WebDriver.for(:chrome, capabilities: cap)
driver.get('http://google.com')
  
let webdriver = require('selenium-webdriver');
let chrome = require('selenium-webdriver/chrome');
let proxy = require('selenium-webdriver/proxy');
let opts = new chrome.Options();

(async function example() {
  opts.setProxy(proxy.manual({http: '<HOST:PORT>'}));
  let driver = new webdriver.Builder()
    .forBrowser('chrome')
    .setChromeOptions(opts)
    .build();
  try {
    await driver.get("https://selenium.dev");
  }
  finally {
   await driver.quit();
  }
}());
  
import org.openqa.selenium.Proxy
import org.openqa.selenium.WebDriver
import org.openqa.selenium.chrome.ChromeDriver
import org.openqa.selenium.chrome.ChromeOptions

class proxyTest {
    fun main() {

        val proxy = Proxy()
        proxy.setHttpProxy("<HOST:PORT>")
        val options = ChromeOptions()
        options.setCapability("proxy", proxy)
        val driver: WebDriver = ChromeDriver(options)
        driver["https://www.google.com/"]
        driver.manage().window().maximize()
        driver.quit()
    }
}
  

7 - Page loading strategy

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Defines the current session’s page loading strategy. By default, when Selenium WebDriver loads a page, it follows the normal pageLoadStrategy. It is always recommended to stop downloading additional resources (like images, css, js) when the page loading takes lot of time.

The document.readyState property of a document describes the loading state of the current document. By default, WebDriver will hold off on responding to a driver.get() (or) driver.navigate().to() call until the document ready state is complete

In SPA applications (like Angular, React, Ember) once the dynamic content is already loaded (I.e once the pageLoadStrategy status is COMPLETE), clicking on a link or performing some action within the page will not make a new request to the server as the content is dynamically loaded at the client side without a full page refresh.

SPA applications can load many views dynamically without any server requests, So pageLoadStrategy will always show COMPLETE status until we do a new driver.get() and driver.navigate().to()

WebDriver pageLoadStrategy supports the following values:

normal

This will make Selenium WebDriver to wait for the entire page is loaded. When set to normal, Selenium WebDriver waits until the load event fire is returned.

By default normal is set to browser if none is provided.

import org.openqa.selenium.PageLoadStrategy;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeOptions;
import org.openqa.selenium.chrome.ChromeDriver;

public class pageLoadStrategy {
    public static void main(String[] args) {
        ChromeOptions chromeOptions = new ChromeOptions();
        chromeOptions.setPageLoadStrategy(PageLoadStrategy.NORMAL);
        WebDriver driver = new ChromeDriver(chromeOptions);
        try {
            // Navigate to Url
            driver.get("https://google.com");
        } finally {
            driver.quit();
        }
    }
}
  
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
options = Options()
options.page_load_strategy = 'normal'
driver = webdriver.Chrome(options=options)
# Navigate to url
driver.get("http://www.google.com")
driver.quit()

  
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;

namespace pageLoadStrategy {
  class pageLoadStrategy {
    public static void Main(string[] args) {
      var chromeOptions = new ChromeOptions();
      chromeOptions.PageLoadStrategy = PageLoadStrategy.Normal;
      IWebDriver driver = new ChromeDriver(chromeOptions);
      try {
        driver.Navigate().GoToUrl("https://example.com");
      } finally {
        driver.Quit();
      }
    }
  }
}
  
require 'selenium-webdriver'
caps = Selenium::WebDriver::Remote::Capabilities.chrome
caps.page_load_strategy='normal'

driver = Selenium::WebDriver.for :chrome, :desired_capabilities => caps
driver.get('https://www.google.com')
  
const {Builder, Capabilities} = require('selenium-webdriver');
const caps = new Capabilities();
caps.setPageLoadStrategy("normal");
(async function example() {
    let driver = await new Builder().
                withCapabilities(caps).
                forBrowser('chrome').
                build();
    try {
        // Navigate to Url
        await driver.get('https://www.google.com');
    }
    finally {
        await driver.quit();
    }
})();
  
import org.openqa.selenium.PageLoadStrategy
import org.openqa.selenium.chrome.ChromeDriver
import org.openqa.selenium.chrome.ChromeOptions

fun main() {
    val chromeOptions = ChromeOptions()
    chromeOptions.setPageLoadStrategy(PageLoadStrategy.NORMAL)
    val driver = ChromeDriver(chromeOptions)
    try {
        driver.get("https://www.google.com")
    }
    finally {
        driver.quit()
    }
}
  

eager

This will make Selenium WebDriver to wait until the initial HTML document has been completely loaded and parsed, and discards loading of stylesheets, images and subframes.

When set to eager, Selenium WebDriver waits until DOMContentLoaded event fire is returned.

import org.openqa.selenium.PageLoadStrategy;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeOptions;
import org.openqa.selenium.chrome.ChromeDriver;

public class pageLoadStrategy {
    public static void main(String[] args) {
        ChromeOptions chromeOptions = new ChromeOptions();
        chromeOptions.setPageLoadStrategy(PageLoadStrategy.EAGER);
        WebDriver driver = new ChromeDriver(chromeOptions);
        try {
            // Navigate to Url
            driver.get("https://google.com");
        } finally {
            driver.quit();
        }
    }
}
  
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
options = Options()
options.page_load_strategy = 'eager'
driver = webdriver.Chrome(options=options)
# Navigate to url
driver.get("http://www.google.com")
driver.quit()
  
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;

namespace pageLoadStrategy {
  class pageLoadStrategy {
    public static void Main(string[] args) {
      var chromeOptions = new ChromeOptions();
      chromeOptions.PageLoadStrategy = PageLoadStrategy.Eager;
      IWebDriver driver = new ChromeDriver(chromeOptions);
      try {
        driver.Navigate().GoToUrl("https://example.com");
      } finally {
        driver.Quit();
      }
    }
  }
}
  
require 'selenium-webdriver'
caps = Selenium::WebDriver::Remote::Capabilities.chrome
caps.page_load_strategy='eager'

driver = Selenium::WebDriver.for :chrome, :desired_capabilities => caps
driver.get('https://www.google.com')
  
const {Builder, Capabilities} = require('selenium-webdriver');
const caps = new Capabilities();
caps.setPageLoadStrategy("eager");
(async function example() {
    let driver = await new Builder().
                withCapabilities(caps).
                forBrowser('chrome').
                build();
    try {
        // Navigate to Url
        await driver.get('https://www.google.com');
    }
    finally {
        await driver.quit();
    }
})();
  
import org.openqa.selenium.PageLoadStrategy
import org.openqa.selenium.chrome.ChromeDriver
import org.openqa.selenium.chrome.ChromeOptions

fun main() {
    val chromeOptions = ChromeOptions()
    chromeOptions.setPageLoadStrategy(PageLoadStrategy.EAGER)
    val driver = ChromeDriver(chromeOptions)
    try {
        driver.get("https://www.google.com")
    }
    finally {
        driver.quit()
    }
}
  

none

When set to none Selenium WebDriver only waits until the initial page is downloaded.

import org.openqa.selenium.PageLoadStrategy;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeOptions;
import org.openqa.selenium.chrome.ChromeDriver;

public class pageLoadStrategy {
    public static void main(String[] args) {
        ChromeOptions chromeOptions = new ChromeOptions();
        chromeOptions.setPageLoadStrategy(PageLoadStrategy.NONE);
        WebDriver driver = new ChromeDriver(chromeOptions);
        try {
            // Navigate to Url
            driver.get("https://google.com");
        } finally {
            driver.quit();
        }
    }
}
  
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
options = Options()
options.page_load_strategy = 'none'
driver = webdriver.Chrome(options=options)
# Navigate to url
driver.get("http://www.google.com")
driver.quit()
  
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;

namespace pageLoadStrategy {
  class pageLoadStrategy {
    public static void Main(string[] args) {
      var chromeOptions = new ChromeOptions();
      chromeOptions.PageLoadStrategy = PageLoadStrategy.None;
      IWebDriver driver = new ChromeDriver(chromeOptions);
      try {
        driver.Navigate().GoToUrl("https://example.com");
      } finally {
        driver.Quit();
      }
    }
  }
}
  
require 'selenium-webdriver'
caps = Selenium::WebDriver::Remote::Capabilities.chrome
caps.page_load_strategy='none'

driver = Selenium::WebDriver.for :chrome, :desired_capabilities => caps
driver.get('https://www.google.com')
  
const {Builder, Capabilities} = require('selenium-webdriver');
const caps = new Capabilities();
caps.setPageLoadStrategy("none");
(async function example() {
    let driver = await new Builder().
                withCapabilities(caps).
                forBrowser('chrome').
                build();
    try {
        // Navigate to Url
        await driver.get('https://www.google.com');
    }
    finally {
        await driver.quit();
    }
})();
  
import org.openqa.selenium.PageLoadStrategy
import org.openqa.selenium.chrome.ChromeDriver
import org.openqa.selenium.chrome.ChromeOptions

fun main() {
    val chromeOptions = ChromeOptions()
    chromeOptions.setPageLoadStrategy(PageLoadStrategy.NONE)
    val driver = ChromeDriver(chromeOptions)
    try {
        driver.get("https://www.google.com")
    }
    finally {
        driver.quit()
    }
}
  

8 - Webelement

WebElement repräsentiert ein Element im DOM. WebElemente können ausgehend vom Wurzelknoten (root) gesucht werden oder ausgehend von einem anderen WebElement.

Die WebDriver API stellt Methoden zur Verfügung, die es ermöglichen WebElemente, aufgrund ihrer Eigenschaften zu finden wie z.B. ID, Name, Class (CSS-Klasse), Xpath, CSS Selektoren, Text einer Verlinkung, etc.

Elemente finden

findElement wird verwendet, um ein WebElement zu finden. Die Funktion liefert als Rückgabewert die Referenz auf ein einzelnes WebElement, dieses kann dann für weitere Aktionen verwendet werden.

WebDriver driver = new FirefoxDriver();

driver.get("http://www.google.com");

// Get search box element from webElement 'q' using Find Element
WebElement searchBox = driver.findElement(By.name("q"));

searchBox.sendKeys("webdriver");
  
from selenium import webdriver
from selenium.webdriver.common.by import By

driver = webdriver.Firefox()

driver.get("http://www.google.com")

# Get search box element from webElement 'q' using Find Element
search_box = driver.find_element(By.NAME, "q")

search_box.send_keys("webdriver")
  
IWebDriver driver = new FirefoxDriver();

driver.Url = "http://www.google.com";

// Get search box element from webElement 'q' using Find Element
IWebElement searchbox = driver.FindElement(By.Name("q"));

searchbox.SendKeys("webdriver");
  
require 'selenium-webdriver'
driver = Selenium::WebDriver.for :firefox
begin
  # Navigate to URL
  driver.get 'https://google.com'

  # Get search box element from webElement 'q' using Find Element
  search_bar = driver.find_element(name: 'q')

  # Perform action using WebElement
  search_bar.send_keys 'Webdriver'
ensure
  driver.quit
end
  
let {Builder, By} = require('selenium-webdriver');
driver = new Builder().forBrowser('firefox').build();

(async function test(){

//Navigate to url
await driver.get('http://www.google.com');

// Get search box element from webElement 'q' using Find Element
let searchBar = driver.findElement(By.name('q'));

//Perform action using WebElement
await searchBar.sendKeys('Webdriver');

})();
  
val driver = FirefoxDriver()

driver.get("http://www.google.com")

// Get search box element from webElement 'q' using Find Element
val searchBox = driver.findElement(By.name("q"))

searchBox.sendKeys("webdriver")
  

Finden einer Liste von Elementen

Äquivalent zu ‘Find Element’ liefert die Funktion findElements eine Liste von WebElementen. Um ein bestimmtes Element aus der Liste zu verwenden, ist es notwendig über die Liste zu iterieren, um eine Aktion an den einzelnen Elementen auszuführen.

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import java.util.List;

public class findElementsExample {
    public static void main(String[] args) {
        WebDriver driver = new FirefoxDriver();
        try {
            driver.get("https://example.com");
            // Get all the elements available with tag name 'p'
            List<WebElement> elements = driver.findElements(By.tagName("p"));
            for (WebElement element : elements) {
                System.out.println("Paragraph text:" + element.getText());
            }
        } finally {
            driver.quit();
        }
    }
}
  
from selenium import webdriver
from selenium.webdriver.common.by import By

driver = webdriver.Firefox()

# Navigate to Url
driver.get("https://www.example.com")

# Get all the elements available with tag name 'p'
elements = driver.find_elements(By.TAG_NAME, 'p')

for e in elements:
    print(e.text)
  
using OpenQA.Selenium;
using OpenQA.Selenium.Firefox;
using System.Collections.Generic;

namespace FindElementsExample {
 class FindElementsExample {
  public static void Main(string[] args) {
   IWebDriver driver = new FirefoxDriver();
   try {
    // Navigate to Url
    driver.Navigate().GoToUrl("https://example.com");

    // Get all the elements available with tag name 'p'
    IList < IWebElement > elements = driver.FindElements(By.TagName("p"));
    foreach(IWebElement e in elements) {
     System.Console.WriteLine(e.Text);
    }

   } finally {
    driver.Quit();
   }
  }
 }
}
  
require 'selenium-webdriver'
driver = Selenium::WebDriver.for :firefox
begin
  # Navigate to URL
  driver.get 'https://www.example.com'

  # Get all the elements available with tag name 'p'
  elements = driver.find_elements(:tag_name,'p')

  elements.each { |e|
    puts e.text
  }
ensure
  driver.quit
end
  
const {Builder, By} = require('selenium-webdriver');
(async function example() {
    let driver = await new Builder().forBrowser('firefox').build();
    try {
        // Navigate to Url
        await driver.get('https://www.example.com');

        // Get all the elements available with tag 'p'
        let elements = await driver.findElements(By.css('p'));
        for(let e of elements) {
            console.log(await e.getText());
        }
    }
    finally {
        await driver.quit();
    }
})();
  
import org.openqa.selenium.By
import org.openqa.selenium.firefox.FirefoxDriver

fun main() {
    val driver = FirefoxDriver()
    try {
        driver.get("https://example.com")
        // Get all the elements available with tag name 'p'
        val elements = driver.findElements(By.tagName("p"))
        for (element in elements) {
            println("Paragraph text:" + element.text)
        }
    } finally {
        driver.quit()
    }
}
  

Finden eines Elements innerhalb anderer Elemente

Es ist auch möglich Elemente zu suchen, basierend auf einem existierenden Webelemente, sogenannte “Kinder” bzw. “Nachfahren”. Um dies durchzuführen, wird die ‘findElement’ Methode direkt vom Elternknoten ausgeführt, um nach entsprechenden Kinder-Elementen zu suchen.

WebDriver driver = new FirefoxDriver();
driver.get("http://www.google.com");
WebElement searchForm = driver.findElement(By.tagName("form"));
WebElement searchBox = searchForm.findElement(By.name("q"));
searchBox.sendKeys("webdriver");
  
from selenium import webdriver
from selenium.webdriver.common.by import By

driver = webdriver.Firefox()
driver.get("http://www.google.com")
search_form = driver.find_element(By.TAG_NAME, "form")
search_box = search_form.find_element(By.NAME, "q")
search_box.send_keys("webdriver")
  
IWebDriver driver = new FirefoxDriver();
driver.Url = "http://www.google.com";
IWebElement searchForm = driver.FindElement(By.TagName("form"));
IWebElement searchbox = searchForm.FindElement(By.Name("q"));
searchbox.SendKeys("webdriver");
  
require 'selenium-webdriver'
driver = Selenium::WebDriver.for :firefox
begin
  # Navigate to URL
  driver.get 'https://google.com'

  # Get and store DOM element '<form>'
  search_form = driver.find_element(name: 'f')

  # Get search box element from webElement 'form'
  search_bar = search_form.find_element(name: 'q')

  # Perform action using WebElement
  search_bar.send_keys 'Webdriver'
ensure
  driver.quit
end
  
let {Builder, By} = require('selenium-webdriver');
driver = new Builder().forBrowser('firefox').build();

(async function test(){

//Navigate to url
await driver.get('http://www.google.com');

//Get and store DOM element '<form>'
let searchForm = driver.findElement(By.name('f'));

//Get search box element from webElement 'form'
let searchBar = searchForm.findElement(By.name('q'));

//Perform action using WebElement
await searchBar.sendKeys('Webdriver');

})();
  
val driver = FirefoxDriver()
driver.get("http://www.google.com")
val searchForm = driver.findElement(By.tagName("form"))
val searchBox = searchForm.findElement(By.name("q"))
searchBox.sendKeys("webdriver")
  

Finden von mehreren Elementen innerhalb eines anderen Elements

findElements wird verwenden um entsprechende WebElemente im Kontext eines Eltern-Elementen zu finden. Um dies durchzuführen wird die ‘findElements’-Methode vom entsprechenden WebElement ausgeführt.

  import org.openqa.selenium.By;
  import org.openqa.selenium.WebDriver;
  import org.openqa.selenium.WebElement;
  import org.openqa.selenium.chrome.ChromeDriver;
  import java.util.List;

  public class findElementsFromElement {
      public static void main(String[] args) {
          WebDriver driver = new ChromeDriver();
          try {
              driver.get("https://example.com");

              // Get element with tag name 'div'
              WebElement element = driver.findElement(By.tagName("div"));

              // Get all the elements available with tag name 'p'
              List<WebElement> elements = element.findElements(By.tagName("p"));
              for (WebElement e : elements) {
                  System.out.println(e.getText());
              }
          } finally {
              driver.quit();
          }
      }
  }
  
from selenium import webdriver
from selenium.webdriver.common.by import By

driver = webdriver.Chrome()
driver.get("https://www.example.com")

# Get element with tag name 'div'
element = driver.find_element(By.TAG_NAME, 'div')

# Get all the elements available with tag name 'p'
elements = element.find_elements(By.TAG_NAME, 'p')
for e in elements:
    print(e.text)
  
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;
using System.Collections.Generic;

namespace FindElementsFromElement {
 class FindElementsFromElement {
  public static void Main(string[] args) {
   IWebDriver driver = new ChromeDriver();
   try {
    driver.Navigate().GoToUrl("https://example.com");

    // Get element with tag name 'div'
    IWebElement element = driver.FindElement(By.TagName("div"));

    // Get all the elements available with tag name 'p'
    IList < IWebElement > elements = element.FindElements(By.TagName("p"));
    foreach(IWebElement e in elements) {
     System.Console.WriteLine(e.Text);
    }
   } finally {
    driver.Quit();
   }
  }
 }
}
  
  require 'selenium-webdriver'
  driver = Selenium::WebDriver.for :chrome
  begin
    # Navigate to URL
    driver.get 'https://www.example.com'

    # Get element with tag name 'div'
    element = driver.find_element(:tag_name,'div')

    # Get all the elements available with tag name 'p'
    elements = element.find_elements(:tag_name,'p')

    elements.each { |e|
      puts e.text
    }
  ensure
    driver.quit
  end
  
  const {Builder, By} = require('selenium-webdriver');

  (async function example() {
      let driver = new Builder()
          .forBrowser('chrome')
          .build();

      await driver.get('https://www.example.com');

      // Get element with tag name 'div'
      let element = driver.findElement(By.css("div"));

      // Get all the elements available with tag name 'p'
      let elements = await element.findElements(By.css("p"));
      for(let e of elements) {
          console.log(await e.getText());
      }
  })();
  
  import org.openqa.selenium.By
  import org.openqa.selenium.chrome.ChromeDriver

  fun main() {
      val driver = ChromeDriver()
      try {
          driver.get("https://example.com")

          // Get element with tag name 'div'
          val element = driver.findElement(By.tagName("div"))

          // Get all the elements available with tag name 'p'
          val elements = element.findElements(By.tagName("p"))
          for (e in elements) {
              println(e.text)
          }
      } finally {
          driver.quit()
      }
  }
  

Aktives Element

Wird verwendet um das Element, das den Fokus hat zu finden oder um es zu verfolgen.

  import org.openqa.selenium.*;
  import org.openqa.selenium.chrome.ChromeDriver;

  public class activeElementTest {
    public static void main(String[] args) {
      WebDriver driver = new ChromeDriver();
      try {
        driver.get("http://www.google.com");
        driver.findElement(By.cssSelector("[name='q']")).sendKeys("webElement");

        // Get attribute of current active element
        String attr = driver.switchTo().activeElement().getAttribute("title");
        System.out.println(attr);
      } finally {
        driver.quit();
      }
    }
  }
  
  from selenium import webdriver
  from selenium.webdriver.common.by import By

  driver = webdriver.Chrome()
  driver.get("https://www.google.com")
  driver.find_element(By.CSS_SELECTOR, '[name="q"]').send_keys("webElement")

  # Get attribute of current active element
  attr = driver.switch_to.active_element.get_attribute("title")
  print(attr)
  
    using OpenQA.Selenium;
    using OpenQA.Selenium.Chrome;

    namespace ActiveElement {
     class ActiveElement {
      public static void Main(string[] args) {
       IWebDriver driver = new ChromeDriver();
       try {
        // Navigate to Url
        driver.Navigate().GoToUrl("https://www.google.com");
        driver.FindElement(By.CssSelector("[name='q']")).SendKeys("webElement");

        // Get attribute of current active element
        string attr = driver.SwitchTo().ActiveElement().GetAttribute("title");
        System.Console.WriteLine(attr);
       } finally {
        driver.Quit();
       }
      }
     }
    }
  
  require 'selenium-webdriver'
  driver = Selenium::WebDriver.for :chrome
  begin
    driver.get 'https://www.google.com'
    driver.find_element(css: '[name="q"]').send_keys('webElement')

    # Get attribute of current active element
    attr = driver.switch_to.active_element.attribute('title')
    puts attr
  ensure
    driver.quit
  end
  
  const {Builder, By} = require('selenium-webdriver');

  (async function example() {
      let driver = await new Builder().forBrowser('chrome').build();
      await driver.get('https://www.google.com');
      await  driver.findElement(By.css('[name="q"]')).sendKeys("webElement");

      // Get attribute of current active element
      let attr = await driver.switchTo().activeElement().getAttribute("title");
      console.log(`${attr}`)
  })();
  
  import org.openqa.selenium.By
  import org.openqa.selenium.chrome.ChromeDriver

  fun main() {
      val driver = ChromeDriver()
      try {
          driver.get("https://www.google.com")
          driver.findElement(By.cssSelector("[name='q']")).sendKeys("webElement")

          // Get attribute of current active element
          val attr = driver.switchTo().activeElement().getAttribute("title")
          print(attr)
      } finally {
          driver.quit()
      }
  }
  

Element aktiviert?

Die Methode dient dazu, um festzustellen, ob das referenzierte Element prüfen ob es aktiviert oder deaktiviert ist. Der Rückgabewert ist ein Boolean, Wahr wenn das Element aktiv (enabled) ist, andernfalls Falsch.

  //navigates to url
  driver.get("https://www.google.com/");

  // Returns true if element is enabled else returns false
  boolean value = driver.findElement(By.name("btnK")).isEnabled();
  
# Navigate to url
driver.get("http://www.google.com")

# Returns true if element is enabled else returns false
value = driver.find_element(By.NAME, 'btnK').is_enabled()
  
// Navigate to Url
driver.Navigate().GoToUrl("https://google.com");

// Store the WebElement
IWebElement element = driver.FindElement(By.Name("btnK"));

// Prints true if element is enabled else returns false
System.Console.WriteLine(element.Enabled);
  
# Navigate to url
driver.get 'http://www.google.com/'

# Returns true if element is enabled else returns false
ele = driver.find_element(name: 'btnK').enabled?
  
// Navigate to url
await driver.get('https://www.google.com');

// Resolves Promise and returns boolean value
let element =  await driver.findElement(By.name("btnK")).isEnabled();
  
 //navigates to url
 driver.get("https://www.google.com/")

 //returns true if element is enabled else returns false
 val attr = driver.findElement(By.name("btnK")).isEnabled()
  

Element ausgewählt?

Die Methode stellt fest of das referenzierte Element ausgewählt (Selected) ist oder nicht. Die Methode wird häufig verwendet mit WebElementen vom Typ Checkbox, Radiobutton, Eingabefelder und anderen Elementen die auswählbare Optionen anbieten.

Der Rückgabewert ist ein Boolean, Wahr wenn das Element im aktuellen Browserkontext selektiert ist, andernfalls den Wert Falsch.

 //navigates to url
 driver.get("https://the-internet.herokuapp.com/checkboxes");

 //returns true if element is checked else returns false
 boolean value = driver.findElement(By.cssSelector("input[type='checkbox']:first-of-type")).isSelected();
  
# Navigate to url
driver.get("https://the-internet.herokuapp.com/checkboxes")

# Returns true if element is checked else returns false
value = driver.find_element(By.CSS_SELECTOR, "input[type='checkbox']:first-of-type").is_selected()
  
// Navigate to Url
driver.Navigate().GoToUrl("https://the-internet.herokuapp.com/checkboxes");

// Returns true if element ins checked else returns false
bool value = driver.FindElement(By.CssSelector("input[type='checkbox']:last-of-type")).Selected;
  
# Navigate to url
driver.get 'https://the-internet.herokuapp.com/checkboxes'

# Returns true if element is checked else returns false
ele = driver.find_element(css: "input[type='checkbox']:last-of-type").selected?
  
// Navigate to url
await driver.get('https://the-internet.herokuapp.com/checkboxes');

// Returns true if element ins checked else returns false
let res = await driver.findElement(By.css("input[type='checkbox']:last-of-type")).isSelected();
  
 //navigates to url
 driver.get("https://the-internet.herokuapp.com/checkboxes")

 //returns true if element is checked else returns false
 val attr =  driver.findElement(By.cssSelector("input[type='checkbox']:first-of-type")).isSelected()
  

TagName des Elements ermitteln

Wird verwendet um den TagName des referenzierten Elements, zu ermitteln.

 //navigates to url
 driver.get("https://www.example.com");

 //returns TagName of the element
 String value = driver.findElement(By.cssSelector("h1")).getTagName();
  
# Navigate to url
driver.get("https://www.example.com")

# Returns TagName of the element
attr = driver.find_element(By.CSS_SELECTOR, "h1").tag_name
  
// Navigate to Url
driver.Navigate().GoToUrl("https://www.example.com");

// Returns TagName of the element
string attr = driver.FindElement(By.CssSelector("h1")).TagName;
  
# Navigate to url
driver.get 'https://www.example.com'

# Returns TagName of the element
attr = driver.find_element(css: "h1").tag_name
  
// Navigate to URL
await driver.get('https://www.example.com');

// Returns TagName of the element
let value = await driver.findElement(By.css('h1')).getTagName();
  
 //navigates to url
 driver.get("https://www.example.com")

 //returns TagName of the element
 val attr =  driver.findElement(By.cssSelector("h1")).getTagName()
  

Ermitteln des Elementbereichs (Rect)

Wird verwendet um die Dimension und die Koordinaten des entsprechenden Elementes zu ermitteln.

Der Rückgabewert liefert folgende Werte:

  • X-Koordinate des Elementes ausgehend von der linken oberen Ecke
  • Y-Koordinate des Elementes ausgehend von der linken oberen Ecke
  • Höhe des Elementes
  • Breite des Elementes
// Navigate to url
driver.get("https://www.example.com");

// Returns height, width, x and y coordinates referenced element
Rectangle res =  driver.findElement(By.cssSelector("h1")).getRect();

// Rectangle class provides getX,getY, getWidth, getHeight methods
System.out.println(res.getX());
  
# Navigate to url
driver.get("https://www.example.com")

# Returns height, width, x and y coordinates referenced element
res = driver.find_element(By.CSS_SELECTOR, "h1").rect
  
// Navigate to Url
driver.Navigate().GoToUrl("https://example.com");

var res = driver.FindElement(By.CssSelector("h1"));
// Return x and y coordinates referenced element
System.Console.WriteLine(res.Location);
// Returns height, width
System.Console.WriteLine(res.Size);
  
# Navigate to url
driver.get 'https://www.example.com'

# Returns height, width, x and y coordinates referenced element
res = driver.find_element(css: "h1").rect
  
// Navigate to url
await driver.get('https://www.example.com');

// Returns height, width, x and y coordinates referenced element
let element =  await driver.findElement(By.css("h1")).getRect();
  
// Navigate to url
driver.get("https://www.example.com")

// Returns height, width, x and y coordinates referenced element
val res = driver.findElement(By.cssSelector("h1")).rect

// Rectangle class provides getX,getY, getWidth, getHeight methods
println(res.getX())
  

Ermitteln von CSS Werten

Liefert den Wert einer spezifischen CSS Eigenschaft des entsprechenden Elementes im aktuellen Browserkontext.

// Navigate to Url
driver.get("https://www.example.com");

// Retrieves the computed style property 'color' of linktext
String cssValue = driver.findElement(By.linkText("More information...")).getCssValue("color");

  
# Navigate to Url
driver.get('https://www.example.com')

# Retrieves the computed style property 'color' of linktext
cssValue = driver.findElement(By.LINK_TEXT, "More information...").value_of_css_property('color')

  
// Navigate to Url
driver.Navigate().GoToUrl("https://www.example.com");

// Retrieves the computed style property 'color' of linktext
String cssValue = driver.FindElement(By.LinkText("More information...")).GetCssValue("color");

  
# Navigate to Url
driver.get 'https://www.example.com'

# Retrieves the computed style property 'color' of linktext
cssValue = driver.find_element(:link_text, 'More information...').css_value('color')

  
// Navigate to Url
await driver.get('https://www.example.com');

// Retrieves the computed style property 'color' of linktext
let cssValue = await driver.findElement(By.linkText("More information...")).getCssValue('color');
    
// Navigate to Url
driver.get("https://www.example.com")

// Retrieves the computed style property 'color' of linktext
val cssValue = driver.findElement(By.linkText("More information...")).getCssValue("color")

  

Ermitteln des Textes

Liefert den Text des spezifischen Elementes.

// Navigate to url
driver.get("https://example.com");

// Retrieves the text of the element
String text = driver.findElement(By.cssSelector("h1")).getText();
  
# Navigate to url
driver.get("https://www.example.com")

# Retrieves the text of the element
text = driver.find_element(By.CSS_SELECTOR, "h1").text
  
// Navigate to url
driver.Url="https://example.com";

// Retrieves the text of the element
String text = driver.FindElement(By.CssSelector("h1")).Text;
  
# Navigate to url
driver.get 'https://www.example.com'

# Retrieves the text of the element
text = driver.find_element(:css, 'h1').text
  
// Navigate to URL
await driver.get('http://www.example.com');

// retrieves the text of the element
let text = await driver.findElement(By.css('h1')).getText();
    
// Navigate to URL
driver.get("https://www.example.com")

// retrieves the text of the element
val text = driver.findElement(By.cssSelector("h1")).getText()
  

9 - Tastatur

Tastatur repräsentiert Tastaturaktionen. Tastatur “Actions” werden mit Hilfe eines low-level Interface durchgeführt, dass ein virtualisiertes Eingabegerät für den Webbrowser zur Verfügung stellt.

sendKeys

Die sendKeys-Methode sendet eine Tastensequenz in das DOM Element, selbst wenn eine modifizierte Tastensequenz angegeben wird. Hier ist eine Liste der möglichen Tastenanschläge die vom WebDriver unterstützt wird.

import org.openqa.selenium.By;
import org.openqa.selenium.Keys;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;

public class HelloSelenium {
  public static void main(String[] args) {
    WebDriver driver = new FirefoxDriver();
    try {
      // Navigate to Url
      driver.get("https://google.com");

      // Enter text "q" and perform keyboard action "Enter"
      driver.findElement(By.name("q")).sendKeys("q" + Keys.ENTER);
    } finally {
      driver.quit();
    }
  }
}
  
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.keys import Keys
driver = webdriver.Firefox()

# Navigate to url
driver.get("http://www.google.com")

# Enter "webdriver" text and perform "ENTER" keyboard action
driver.find_element(By.NAME, "q").send_keys("webdriver" + Keys.ENTER)
  
using (var driver = new FirefoxDriver())
{
  // Navigate to Url
  driver.Navigate().GoToUrl("https://google.com");

  // Enter "webdriver" text and perform "ENTER" keyboard action
  driver.FindElement(By.Name("q")).SendKeys("webdriver" + Keys.Enter);
}
  
require 'selenium-webdriver'
driver = Selenium::WebDriver.for :firefox
begin
  # Navigate to URL
  driver.get 'https://google.com'

  # Enter "webdriver" text and perform "ENTER" keyboard action
  driver.find_element(name: 'q').send_keys 'webdriver', :return

ensure
  driver.quit
end
  
const {Builder, By, Key} = require('selenium-webdriver');

(async function example() {
  let driver = await new Builder().forBrowser('firefox').build();

  try {
    // Navigate to Url
    await driver.get('https://www.google.com');

    // Enter text "webdriver" and perform keyboard action "Enter"
    await driver.findElement(By.name('q')).sendKeys('webdriver', Key.ENTER);
  }
  finally {
    await driver.quit();
  }
})();
  
import org.openqa.selenium.By
import org.openqa.selenium.Keys
import org.openqa.selenium.firefox.FirefoxDriver

fun main() {
  val driver = FirefoxDriver()
  try {
    // Navigate to Url
    driver.get("https://google.com")

    // Enter text "q" and perform keyboard action "Enter"
    driver.findElement(By.name("q")).sendKeys("q" + Keys.ENTER)
  } finally {
    driver.quit()
  }
}
  

keyDown

Die keyDown-Methode wird verwendet um Aktionen zu simulieren bei denen eine der modifizierenden Tasten gedrückt wird (STRG, SHIFT, ALT).

WebDriver driver = new ChromeDriver();
try {
  // Navigate to Url
  driver.get("https://google.com");

  // Enter "webdriver" text and perform "ENTER" keyboard action
  driver.findElement(By.name("q")).sendKeys("webdriver" + Keys.ENTER);

  Actions actionProvider = new Actions(driver);
  Action keydown = actionProvider.keyDown(Keys.CONTROL).sendKeys("a").build();
  keydown.perform();
} finally {
  driver.quit();
}
  
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.keys import Keys
driver = webdriver.Chrome()

# Navigate to url
driver.get("http://www.google.com")

# Enter "webdriver" text and perform "ENTER" keyboard action
driver.find_element(By.NAME, "q").send_keys("webdriver" + Keys.ENTER)

# Perform action ctrl + A (modifier CONTROL + Alphabet A) to select the page
webdriver.ActionChains(driver).key_down(Keys.CONTROL).send_keys("a").perform()
  
IWebDriver driver = new ChromeDriver();
try
{
  // Navigate to Url
  driver.Navigate().GoToUrl("https://google.com");

  // Enter "webdriver" text and perform "ENTER" keyboard action
  driver.FindElement(By.Name("q")).SendKeys("webdriver" + Keys.Enter);

  // Perform action ctrl + A (modifier CONTROL + Alphabet A) to select the page
  Actions actionProvider = new Actions(driver);
  IAction keydown = actionProvider.KeyDown(Keys.Control).SendKeys("a").Build();
  keydown.Perform();
}
finally
{
  driver.Quit();
}
  
require 'selenium-webdriver'
driver = Selenium::WebDriver.for :chrome
begin
  # Navigate to URL
  driver.get 'https://google.com'

  # Enter "webdriver" text and perform "ENTER" keyboard action
  driver.find_element(name: 'q').send_keys 'webdriver', :return

  # Perform action ctrl + A (modifier CONTROL + Alphabet A) to select the page
  driver.action.key_down(:control).send_keys('a').perform

ensure
  driver.quit
end
  
const {Builder, By, Key} = require('selenium-webdriver');

(async function example() {
  let driver = await new Builder().forBrowser('chrome').build();

  try {
    // Navigate to Url
    await driver.get('https://www.google.com');

    // Enter text "webdriver" and perform keyboard action "Enter"
    await driver.findElement(By.name('q')).sendKeys('webdriver', Key.ENTER);

    // Perform action ctrl + A (modifier CONTROL + Alphabet A) to select the page
    await driver.actions().keyDown(Key.CONTROL).sendKeys('a').perform();
  }
  finally {
    await driver.quit();
  }
})();
  
import org.openqa.selenium.By
import org.openqa.selenium.Keys
import org.openqa.selenium.chrome.ChromeDriver
import org.openqa.selenium.interactions.Actions

fun main() {
  val driver = ChromeDriver()
  try {
    // Navigate to Url
    driver.get("https://google.com")

    // Enter "webdriver" text and perform "ENTER" keyboard action
    driver.findElement(By.name("q")).sendKeys("webdriver" + Keys.ENTER)
    val action = Actions(driver)

    // Perform action ctrl + A (modifier CONTROL + Alphabet A) to select the page
    action.keyDown(Keys.CONTROL).sendKeys("a").build().perform()
  } finally {
    driver.quit()
  }
}
  

keyUp

Die keyUp-Methode wird verwendet um das key-up oder loslassen einer modifizieren Tasten (STRG, SHIFT, ALT) zu simulieren.

import org.openqa.selenium.By;
import org.openqa.selenium.Keys;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.interactions.Actions;

public class HelloSelenium {
  public static void main(String[] args) {
    WebDriver driver = new FirefoxDriver();
    try {
      // Navigate to Url
      driver.get("https://google.com");
      Actions action = new Actions(driver);

      // Store google search box WebElement
      WebElement search = driver.findElement(By.name("q"));

      // Enters text "qwerty" with keyDown SHIFT key and after keyUp SHIFT key (QWERTYqwerty)
      action.keyDown(Keys.SHIFT).sendKeys(search,"qwerty").keyUp(Keys.SHIFT).sendKeys("qwerty").perform();
    } finally {
      driver.quit();
    }
  }
}
  
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.keys import Keys
driver = webdriver.Chrome()

# Navigate to url
driver.get("http://www.google.com")

# Store google search box WebElement
search = driver.find_element(By.NAME, "q")

action = webdriver.ActionChains(driver)

# Enters text "qwerty" with keyDown SHIFT key and after keyUp SHIFT key (QWERTYqwerty)
action.key_down(Keys.SHIFT).send_keys_to_element(search, "qwerty").key_up(Keys.SHIFT).send_keys("qwerty").perform()
  
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;
using OpenQA.Selenium.Interactions;

namespace HelloSelenium
{
  class HelloSelenium
  {
    public static void Main(string[] args)
    {
      IWebDriver driver = new ChromeDriver();
      try
      {
        // Navigate to Url
        driver.Navigate().GoToUrl("https://google.com");

        Actions action = new Actions(driver);
        // Store google search box WebElement
        IWebElement search = driver.FindElement(By.Name("q"));

        // Enters text "qwerty" with keyDown SHIFT key and after keyUp SHIFT key (QWERTYqwerty)
        action.KeyDown(Keys.Shift).SendKeys(search, "qwerty").KeyUp(Keys.Shift).SendKeys("qwerty").Perform();

      }
      finally {
        driver.Quit();
      }
    }
  }
}

  
require 'selenium-webdriver'
driver = Selenium::WebDriver.for :chrome
begin
  # Navigate to URL
  driver.get 'https://google.com'

  # Store google search box WebElement
  search = driver.find_element(name: 'q')

  # Enters text "qwerty" with keyDown SHIFT key and after keyUp SHIFT key (QWERTYqwerty)
  driver.action.key_down(:shift).send_keys(search,'qwerty').key_up(:shift).send_keys("qwerty").perform

ensure
  driver.quit
end
  
const {Builder, By, Key} = require('selenium-webdriver');
(async function example() {
  let driver = await new Builder().forBrowser('firefox').build();
  try {
    // Navigate to Url
    await driver.get('https://www.google.com');

    // Store google search box WebElement
    let search = driver.findElement(By.name('q'));

    // Enters text "qwerty" with keyDown SHIFT key and after keyUp SHIFT key (QWERTYqwerty)
    await driver.actions().click(search).keyDown(Key.SHIFT).sendKeys("qwerty").keyUp(Key.SHIFT).sendKeys("qwerty").perform();
  }
  finally {
    await driver.quit();
  }
})();
  
import org.openqa.selenium.By
import org.openqa.selenium.Keys
import org.openqa.selenium.chrome.ChromeDriver
import org.openqa.selenium.interactions.Actions

fun main() {
  val driver = ChromeDriver()
  try {
    // Navigate to Url
    driver.get("https://google.com")

    // Store google search box WebElement
    val search = driver.findElement(By.name("q"))
    val action = Actions(driver)

    // Enters text "qwerty" with keyDown SHIFT key and after keyUp SHIFT key (QWERTYqwerty)
    action.keyDown(Keys.SHIFT).sendKeys(search, "qwerty").keyUp(Keys.SHIFT).sendKeys("qwerty").build().perform()
  } finally {
    driver.quit()
  }
}
  

clear

Clear löscht den Inhalt von einem veränderbaren Element. Das gilt nur für Elemente die veränderbar und interaktionsfähig sind, sonst liefert Selenium eine Fehlermeldung (ungültiger Elementstatus (= element state) order Element nicht interaktionsfähig (=interactable))

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;

public class clear {
  public static void main(String[] args) {
    WebDriver driver = new ChromeDriver();
    try {
      // Navigate to Url
      driver.get("https://www.google.com");
      // Store 'SearchInput' element
      WebElement searchInput = driver.findElement(By.name("q"));
      searchInput.sendKeys("selenium");
      // Clears the entered text
      searchInput.clear();
    } finally {
      driver.quit();
    }
  }
}
  
from selenium import webdriver
from selenium.webdriver.common.by import By
driver = webdriver.Chrome()

# Navigate to url
driver.get("http://www.google.com")
# Store 'SearchInput' element
SearchInput = driver.find_element(By.NAME, "q")
SearchInput.send_keys("selenium")
# Clears the entered text
SearchInput.clear()
  
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;
using System;

namespace SnipetProjectDelete
{
  class Program
  {
    static void Main(string[] args)
    {
      IWebDriver driver = new ChromeDriver();
      try
      {
        // Navigate to Url
        driver.Navigate().GoToUrl(@"https://www.google.com");
        // Store 'SearchInput' element
        IWebElement searchInput = driver.FindElement(By.Name("q"));
        searchInput.SendKeys("selenium");
        // Clears the entered text
        searchInput.Clear();
      }
      finally
      {
        driver.Quit();
      }
    }
  }
}
  
require 'selenium-webdriver'
driver = Selenium::WebDriver.for :chrome
begin
  # Navigate to URL
  driver.get 'https://google.com'
  # store 'search_input' element
  search_input = driver.find_element(name: 'q')
  search_input.send_keys('selenium')
  # Clears the entered text
  search_input.clear
ensure
  driver.quit
end
  
const {Builder, By} = require('selenium-webdriver');
(async function example() {
  let driver = await new Builder().forBrowser('chrome').build();
  try {
    // Navigate to Url
    await driver.get('https://www.google.com');
    // Store 'SearchInput' element
    let searchInput = driver.findElement(By.name('q'));
    await searchInput.sendKeys("selenium");
    // Clears the entered text
    await searchInput.clear();
  }
  finally {
    await driver.quit();
  }
})();
  
import org.openqa.selenium.By
import org.openqa.selenium.chrome.ChromeDriver
fun main() {
  val driver =  ChromeDriver()
  try {
    // Navigate to Url
    driver.get("https://www.google.com")
    // Store 'searchInput' element
    val searchInput = driver.findElement(By.name("q"))
    searchInput.sendKeys("selenium")
    // Clears the entered text
    searchInput.clear()
  } finally {
    driver.quit()
  }
}
  

10 - Remote WebDriver

Page being translated from English to German. Do you speak German? Help us to translate it by sending us pull requests!

Der WebDriver kann über eine Remoteverbindung genau so verwendet werden wie bei einer lokalen Verbindung. Der Hauptunterschied ist das der remote WebDriver konfiguriert werden muss, sodass die Testdurchführung auf einem anderen Rechner gestartet werden kann.

Der remote WebDriver besteht aus zwei Komponenten: Einem Client und einem Server. Der Client besteht aus dem WebDriver-Test und der Server ist ein einfaches Java Servlet, welches auf jedem modernen JEE App Server gehostet werden kann.

Um einen remote WebDriver Client zu starten, ist es notwendig eine Verbindung zum Remote WebDriver aufzubauen. Das geschiet, indem eine Verbindung zu einer URL aufgebaut wird, der die Testdurchführung vornimmt. Die gewünschte Konfiguration wird mithilfe der Capabilities (= Einstellungen) definiert. Im folgenden Beispiel wird ein remote WebDriver Objekt instanziert, der mit dem remote Webserver, www.example.com, verbunden wird, um dort die Tests mit einem Firefox Browser auszuführen.

FirefoxOptions firefoxOptions = new FirefoxOptions();
WebDriver driver = new RemoteWebDriver(new URL("http://www.example.com"), firefoxOptions);
driver.get("http://www.google.com");
driver.quit();
  
from selenium import webdriver

firefox_options = webdriver.FirefoxOptions()
driver = webdriver.Remote(
    command_executor='http://www.example.com',
    options=firefox_options
)
driver.get("http://www.google.com")
driver.quit()
  
 FirefoxOptions firefoxOptions = new FirefoxOptions();
 IWebDriver driver = new RemoteWebDriver(new Uri("http://www.example.com"), firefoxOptions);
 driver.Navigate().GoToUrl("http://www.google.com");
 driver.Quit();
  
require 'selenium-webdriver'

driver = Selenium::WebDriver.for :remote, url: "http://www.example.com", desired_capabilities: :firefox
driver.get "http://www.google.com"
driver.close
  
const { Builder, Capabilities } = require("selenium-webdriver");
var capabilities = Capabilities.firefox();
(async function helloSelenium() {
    let driver = new Builder()        
        .usingServer("http://example.com")   
        .withCapabilities(capabilities)
        .build();
    try {
        await driver.get('http://www.google.com');
    } finally {
        await driver.quit();
    }
})(); 
  
firefoxOptions = FirefoxOptions()
driver: WebDriver = new RemoteWebDriver(new URL("http://www.example.com"), firefoxOptions)
driver.get("http://www.google.com")
driver.quit()
  

Um die Testkonfiguration weiter anzupassen, können weitere Einstellungen hinzugefügt werden.

Browser Optionen

Angenommen es ist gewünscht Chrome unter Windows XP in der Version 67 zu verwenden:

ChromeOptions chromeOptions = new ChromeOptions();
chromeOptions.setCapability("browserVersion", "67");
chromeOptions.setCapability("platformName", "Windows XP");
WebDriver driver = new RemoteWebDriver(new URL("http://www.example.com"), chromeOptions);
driver.get("http://www.google.com");
driver.quit();
  
from selenium import webdriver

chrome_options = webdriver.ChromeOptions()
chrome_options.set_capability("browserVersion", "67")
chrome_options.set_capability("platformName", "Windows XP")
driver = webdriver.Remote(
    command_executor='http://www.example.com',
    options=chrome_options
)
driver.get("http://www.google.com")
driver.quit()  
  
var chromeOptions = new ChromeOptions();
chromeOptions.BrowserVersion = "67";
chromeOptions.PlatformName = "Windows XP";
IWebDriver driver = new RemoteWebDriver(new Uri("http://www.example.com"), chromeOptions);
driver.Navigate().GoToUrl("http://www.google.com");
driver.Quit();
  
caps = Selenium::WebDriver::Remote::Capabilities.chrome
caps.platform = Windows XP
caps.version = 67

driver = Selenium::WebDriver.for :remote, :url => "http://www.example.com", :desired_capabilities => caps
  
const { Builder } = require("selenium-webdriver");
const chrome = require("selenium-webdriver/chrome");
let opts = new chrome.Options();
opts.setAcceptInsecureCerts(true);
opts.setBrowserVersion('67');
opts.setPlatform('Windows XP');
(async function helloSelenium() {
    let driver = new Builder()
        .usingServer("http://example.com")
        .forBrowser('chrome')
        .setChromeOptions(opts)
        .build();
    try {
        await driver.get('http://www.google.com');
    }
    finally {
        await driver.quit();
    }
})();
  
val chromeOptions = ChromeOptions()
chromeOptions.setCapability("browserVersion", "67")
chromeOptions.setCapability("platformName", "Windows XP")
val driver: WebDriver = new RemoteWebDriver(new URL("http://www.example.com"), chromeOptions)
driver.get("http://www.google.com")
driver.quit()
  

Detektor für lokale Dateien

Der Detektor erlaubt Dateien vom Client zum remote Server zu übertragen. Es kann z.B. notwendig sein eine Datei in einer Webapplikation hochzuladen. Der remote WebDriver kann automatisch die Datei vom lokalen Rechner zum remote Rechner hochladen, während der Testdurchführung. Dadurch ist es möglich die Datei vom remote Rechner, der die Tests durchführt, hochzuladen. Standardmässig die dies nicht aktiviert, kann jedoch wie folgt aktiviert werden:

driver.setFileDetector(new LocalFileDetector());
  
from selenium.webdriver.remote.file_detector import LocalFileDetector

driver.file_detector = LocalFileDetector()
  
var allowsDetection = this.driver as IAllowsFileDetection;
if (allowsDetection != null)
{
   allowsDetection.FileDetector = new LocalFileDetector();
}
  
@driver.file_detector = lambda do |args|
  # args => ["/path/to/file"]
  str = args.first.to_s
  str if File.exist?(str)
end
  
var remote = require('selenium-webdriver/remote');
driver.setFileDetector(new remote.FileDetector);  
  
driver.fileDetector = LocalFileDetector()
  

Dieser Programmcode, ermöglicht es eine Datei während den Tests hochzuladen, indem der folgende Programmcode verwendet wird:

driver.get("http://sso.dev.saucelabs.com/test/guinea-file-upload");
WebElement upload = driver.findElement(By.id("myfile"));
upload.sendKeys("/Users/sso/the/local/path/to/darkbulb.jpg");
  
driver.get("http://sso.dev.saucelabs.com/test/guinea-file-upload")

driver.find_element(By.ID, "myfile").send_keys("/Users/sso/the/local/path/to/darkbulb.jpg")
  
driver.Navigate().GoToUrl("http://sso.dev.saucelabs.com/test/guinea-file-upload");
IWebElement upload = driver.FindElement(By.Id("myfile"));
upload.SendKeys(@"/Users/sso/the/local/path/to/darkbulb.jpg");
  
@driver.navigate.to "http://sso.dev.saucelabs.com/test/guinea-file-upload"
    element = @driver.find_element(:id, 'myfile')
    element.send_keys "/Users/sso/SauceLabs/sauce/hostess/maitred/maitred/public/images/darkbulb.jpg"
  
driver.get("http://sso.dev.saucelabs.com/test/guinea-file-upload");
var upload = driver.findElement(By.id("myfile"));
upload.sendKeys("/Users/sso/the/local/path/to/darkbulb.jpg");  
  
driver.get("http://sso.dev.saucelabs.com/test/guinea-file-upload")
val upload: WebElement = driver.findElement(By.id("myfile"))
upload.sendKeys("/Users/sso/the/local/path/to/darkbulb.jpg")
  

Tracing client requests

This feature is only available for Java client binding (Beta onwards). The Remote WebDriver client sends requests to the Selenium Grid server, which passes them to the WebDriver. Tracing should be enabled at the server and client-side to trace the HTTP requests end-to-end. Both ends should have a trace exporter setup pointing to the visualization framework. By default, tracing is enabled for both client and server. To set up the visualization framework Jaeger UI and Selenium Grid 4, please refer to Tracing Setup for the desired version.

For client-side setup, follow the steps below.

Beta 1

Add the required dependencies

Installation of external libraries for tracing exporter can be done using Maven. Add the opentelemetry-exporter-jaeger and grpc-netty dependency in your project pom.xml:

  <dependency>
      <groupId>io.opentelemetry</groupId>
      <artifactId>opentelemetry-exporter-jaeger</artifactId>
      <version>0.14.0</version>
    </dependency>
    <dependency>
      <groupId>io.grpc</groupId>
      <artifactId>grpc-netty</artifactId>
      <version>1.34.1</version>
    </dependency>

Add/pass the required system properties while running the client

System.setProperty("JAEGER_SERVICE_NAME", "selenium-java-client");
System.setProperty("JAEGER_AGENT_HOST","localhost");
System.setProperty("JAEGER_AGENT_PORT","14250");

ImmutableCapabilities capabilities = new ImmutableCapabilities("browserName", "chrome");

WebDriver driver = new RemoteWebDriver(new URL("http://www.example.com"), capabilities);

driver.get("http://www.google.com");

driver.quit();

  

Beta 2 onwards

Add the required dependencies

Installation of external libraries for tracing exporter can be done using Maven. Add the opentelemetry-exporter-jaeger and grpc-netty dependency in your project pom.xml:

  <dependency>
      <groupId>io.opentelemetry</groupId>
      <artifactId>opentelemetry-exporter-jaeger</artifactId>
      <version>1.0.0</version>
    </dependency>
    <dependency>
      <groupId>io.grpc</groupId>
      <artifactId>grpc-netty</artifactId>
      <version>1.35.0</version>
    </dependency>

Add/pass the required system properties while running the client

System.setProperty("otel.traces.exporter", "jaeger");
System.setProperty("otel.exporter.jaeger.endpoint", "http://localhost:14250");
System.setProperty("otel.resource.attributes", "service.name=selenium-java-client");

ImmutableCapabilities capabilities = new ImmutableCapabilities("browserName", "chrome");

WebDriver driver = new RemoteWebDriver(new URL("http://www.example.com"), capabilities);

driver.get("http://www.google.com");

driver.quit();

  

Please refer to Tracing Setup for more information on external dependencies versions required for the desired Selenium version.

More information can be found at:

11 - BiDi APIs

Page being translated from English to German. Do you speak German? Help us to translate it by sending us pull requests!

Selenium is working with browser vendors to create the WebDriver BiDirectional Protocol as a means to provide a stable, cross-browser API that uses the bidirectional functionality useful for both browser automation generally and testing specifically. Before now, users seeking this functionality have had to rely on the Chrome DevTools Protocol, with all of its frustrations and limitations.

The traditional webdriver model of strict request/response commands will be supplemented with the ability to stream events from the user agent to the controlling software via WebSockets, better matching the evented nature of the browser DOM.

Because it’s a bad idea to tie your tests to a specific version of a specific browser, the Selenium project recommends using WebDriver BiDi wherever possible. However, until the spec is complete there are many useful things that the CDP offers. To help keep your tests independent and portable, Selenium offers some useful helper classes. At the moment, these use the CDP, but when we shall be using WebDriver Bidi as soon as possible

The following list of APIs will be growing as the Selenium project works through supporting real world use cases. If there is additional functionality you’d like to see, please raise a feature request.

Register Basic Auth

Some applications make use of browser authentication to secure pages. With Selenium, you can automate the input of basic auth credentials whenever they arise.

Predicate<URI> uriPredicate = uri -> uri.getHost().contains("your-domain.com");

((HasAuthentication) driver).register(uriPredicate, UsernameAndPassword.of("admin", "password"));
driver.get("https://your-domain.com/login");
# Please raise a PR to add code sample
NetworkAuthenticationHandler handler = new NetworkAuthenticationHandler()
{
    UriMatcher = (d) => d.Host.Contains("your-domain.com"),
    Credentials = new PasswordCredentials("admin", "password")
};

INetwork networkInterceptor = driver.Manage().Network;
networkInterceptor.AddAuthenticationHandler(handler);
await networkInterceptor.StartMonitoring();
require 'selenium-webdriver'

driver = Selenium::WebDriver.for :chrome

begin
  driver.devtools.new
  driver.register(username: 'username', password: 'password')
  driver.get '<your site url>'
ensure
  driver.quit
end
const {Builder} = require('selenium-webdriver');

(async function example() {
  try {
    let driver = await new Builder()
      .forBrowser('chrome')
      .build();

    const pageCdpConnection = await driver.createCDPConnection('page');
    await driver.register('username', 'password', pageCdpConnection);
    await driver.get('https://the-internet.herokuapp.com/basic_auth');
    await driver.quit();
  }catch (e){
    console.log(e)
  }
}())
val uriPredicate = Predicate { uri: URI ->
        uri.host.contains("your-domain.com")
    }
(driver as HasAuthentication).register(uriPredicate, UsernameAndPassword.of("admin", "password"))
driver.get("https://your-domain.com/login")

Mutation Observation

Mutation Observation is the ability to capture events via WebDriver BiDi when there are DOM mutations on a specific element in the DOM.

ChromeDriver driver = new ChromeDriver();

AtomicReference<DomMutationEvent> seen = new AtomicReference<>();
CountDownLatch latch = new CountDownLatch(1);
((HasLogEvents) driver).onLogEvent(domMutation(mutation -> {
    seen.set(mutation);
    latch.countDown();
}));

driver.get("https://www.google.com");
WebElement span = driver.findElement(By.cssSelector("span"));

((JavascriptExecutor) driver).executeScript("arguments[0].setAttribute('cheese', 'gouda');", span);

assertThat(latch.await(10, SECONDS), is(true));
assertThat(seen.get().getAttributeName(), is("cheese"));
assertThat(seen.get().getCurrentValue(), is("gouda"));

driver.quit();
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.wait import WebDriverWait

driver = webdriver.Chrome()
async with driver.log.mutation_events() as event:
    pages.load("dynamic.html")
    driver.find_element(By.ID, "reveal").click()
    WebDriverWait(driver, 5)\
        .until(EC.visibility_of(driver.find_element(By.ID, "revealed")))

assert event["attribute_name"] == "style"
assert event["current_value"] == ""
assert event["old_value"] == "display:none;"

  
List<DomMutationData> attributeValueChanges = new List<DomMutationData>();
DefaultWait<List<DomMutationData>> wait = new DefaultWait<List<DomMutationData>>(attributeValueChanges);
wait.Timeout = TimeSpan.FromSeconds(3);

IJavaScriptEngine monitor = new JavaScriptEngine(driver);
monitor.DomMutated += (sender, e) =>
{
    attributeValueChanges.Add(e.AttributeData);
};
await monitor.StartEventMonitoring();

driver.Navigate().GoToUrl("http://www.google.com");
IWebElement span = driver.FindElement(By.CssSelector("span"));

await monitor.EnableDomMutationMonitoring();
((IJavaScriptExecutor) driver).ExecuteScript("arguments[0].setAttribute('cheese', 'gouda');", span);

wait.Until((list) => list.Count > 0);
Console.WriteLine("Found {0} DOM mutation events", attributeValueChanges.Count);
foreach(var record in attributeValueChanges)
{
    Console.WriteLine("Attribute name: {0}", record.AttributeName);
    Console.WriteLine("Attribute value: {0}", record.AttributeValue);
}

await monitor.DisableDomMutationMonitoring();
  
require 'selenium-webdriver'
driver = Selenium::WebDriver.for :firefox
begin
  driver.on_log_event(:mutation) { |mutation| mutations.push(mutation) }
  driver.navigate.to url_for('dynamic.html')
  driver.find_element(id: 'reveal').click
  wait.until { mutations.any? }
  mutation = mutations.first
  expect(mutation.element).to eq(driver.find_element(id: 'revealed'))
  expect(mutation.attribute_name).to eq('style')
  expect(mutation.current_value).to eq('')
  expect(mutation.old_value).to eq('display:none;')
ensure
  driver.quit
end
  
const {Builder, until} = require('selenium-webdriver');
const assert = require("assert");

(async function example() {
  try {
    let driver = await new Builder()
      .forBrowser('chrome')
      .build();

    const cdpConnection = await driver.createCDPConnection('page');
    await driver.logMutationEvents(cdpConnection, event => {
      assert.deepStrictEqual(event['attribute_name'], 'style');
      assert.deepStrictEqual(event['current_value'], "");
      assert.deepStrictEqual(event['old_value'], "display:none;");
    });

    await driver.get('dynamic.html');
    await driver.findElement({id: 'reveal'}).click();
    let revealed = driver.findElement({id: 'revealed'});
    await driver.wait(until.elementIsVisible(revealed), 5000);
    await driver.quit();
  }catch (e){
    console.log(e)
  }
}())
  
# Please raise a PR to add code sample
  

Listen to console.log events

Listen to the console.log events and register callbacks to process the event.

ChromeDriver driver = new ChromeDriver();
DevTools devTools = driver.getDevTools();
devTools.createSession();
devTools.send(Log.enable());
devTools.addListener(Log.entryAdded(),
                           logEntry -> {
                               System.out.println("log: "+logEntry.getText());
                               System.out.println("level: "+logEntry.getLevel());
                           });
driver.get("http://the-internet.herokuapp.com/broken_images");
// Check the terminal output for the browser console messages.
driver.quit();
async def printConsoleLogs():
  chrome_options = webdriver.ChromeOptions()
  driver = webdriver.Chrome()
  driver.get("http://www.google.com")

  async with driver.bidi_connection() as session:
      log = Log(driver, session)
      from selenium.webdriver.common.bidi.console import Console
      async with log.add_listener(Console.ALL) as messages:
          driver.execute_script("console.log('I love cheese')")
      print(messages["message"])

  driver.quit()
IJavaScriptEngine monitor = new JavaScriptEngine(driver);
List<string> consoleMessages = new List<string>();
monitor.JavaScriptConsoleApiCalled += (sender, e) =>
{
    Console.WriteLine("Log: {0}", e.MessageContent);
};
await monitor.StartEventMonitoring();
require 'selenium-webdriver'

driver = Selenium::WebDriver.for :chrome
begin
  driver.get 'http://www.google.com'
  logs = []
  driver.on_log_event(:console) do |event|
    logs.push(event)
    puts logs.length
  end

  driver.execute_script('console.log("here")')

ensure
  driver.quit
end
const {Builder} = require('selenium-webdriver');
(async () => {
  try {
    let driver = new Builder()
      .forBrowser('chrome')
      .build();

    const cdpConnection = await driver.createCDPConnection('page');
    await driver.onLogEvent(cdpConnection, function (event) {
      console.log(event['args'][0]['value']);
    });
    await driver.executeScript('console.log("here")');
    await driver.quit();
  }catch (e){
    console.log(e);
  }
})()
fun kotlinConsoleLogExample() {
    val driver = ChromeDriver()
    val devTools = driver.devTools
    devTools.createSession()

    val logConsole = { c: ConsoleEvent -> print("Console log message is: " + c.messages)}
    devTools.domains.events().addConsoleListener(logConsole)

    driver.get("https://www.google.com")

    val executor = driver as JavascriptExecutor
    executor.executeScript("console.log('Hello World')")

    val input = driver.findElement(By.name("q"))
    input.sendKeys("Selenium 4")
    input.sendKeys(Keys.RETURN)
    driver.quit()
}

Listen to JS Exceptions

Listen to the JS Exceptions and register callbacks to process the exception details.

import org.openqa.selenium.*;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.devtools.DevTools;

public void jsExceptionsExample() {
    ChromeDriver driver = new ChromeDriver();
    DevTools devTools = driver.getDevTools();
    devTools.createSession();

    List<JavascriptException> jsExceptionsList = new ArrayList<>();
    Consumer<JavascriptException> addEntry = jsExceptionsList::add;
    devTools.getDomains().events().addJavascriptExceptionListener(addEntry);

    driver.get("<your site url>");

    WebElement link2click = driver.findElement(By.linkText("<your link text>"));
    ((JavascriptExecutor) driver).executeScript("arguments[0].setAttribute(arguments[1], arguments[2]);",
          link2click, "onclick", "throw new Error('Hello, world!')");
    link2click.click();

    for (JavascriptException jsException : jsExceptionsList) {
        System.out.println("JS exception message: " + jsException.getMessage());
        System.out.println("JS exception system information: " + jsException.getSystemInformation());
        jsException.printStackTrace();
    }
}
async def catchJSException():
  chrome_options = webdriver.ChromeOptions()
  driver = webdriver.Chrome()

  async with driver.bidi_connection() as session:
      driver.get("<your site url>")
      log = Log(driver, session)
      async with log.add_js_error_listener() as messages:
          # Operation on the website that throws an JS error
      print(messages)

  driver.quit()
List<string> exceptionMessages = new List<string>();
IJavaScriptEngine monitor = new JavaScriptEngine(driver);
monitor.JavaScriptExceptionThrown += (sender, e) =>
{
    exceptionMessages.Add(e.Message);
};

await monitor.StartEventMonitoring();

driver.Navigate.GoToUrl("<your site url>");

IWebElement link2click = driver.FindElement(By.LinkText("<your link text>"));
((IJavaScriptExecutor) driver).ExecuteScript("arguments[0].setAttribute(arguments[1], arguments[2]);",
      link2click, "onclick", "throw new Error('Hello, world!')");
link2click.Click();

foreach (string message in exceptionMessages)
{
    Console.WriteLine("JS exception message: {0}", message);
}
require 'selenium-webdriver'

driver = Selenium::WebDriver.for :chrome
begin
  driver.get '<your-site-url>'
  exceptions = []
  driver.on_log_event(:exception) do |event|
    exceptions.push(event)
    puts exceptions.length
  end

  # Actions causing JS exceptions

ensure
  driver.quit
end
const {Builder, By} = require('selenium-webdriver');
(async () => {
  try {
    let driver = new Builder()
      .forBrowser('chrome')
      .build();

    const cdpConnection = await driver.createCDPConnection('page')
    await driver.onLogException(cdpConnection, function (event) {
      console.log(event['exceptionDetails']);
    })
    await driver.get('https://the-internet.herokuapp.com');
    const link = await driver.findElement(By.linkText('Checkboxes'));
    await driver.executeScript("arguments[0].setAttribute(arguments[1], arguments[2]);", link, "onclick","throw new Error('Hello, world!')");
    await link.click();
    await driver.quit();
  }catch (e){
    console.log(e);
  }
})()
fun kotlinJsErrorListener() {
    val driver = ChromeDriver()
    val devTools = driver.devTools
    devTools.createSession()

    val logJsError = { j: JavascriptException -> print("Javascript error: '" + j.localizedMessage + "'.") }
    devTools.domains.events().addJavascriptExceptionListener(logJsError)

    driver.get("https://www.google.com")

    val link2click = driver.findElement(By