Test Execution
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Selenium 4 introduced a new API that utilizes CDP (Chrome DevTools Protocol) to allow the user to interact with Chrome DevTools on Chromium-based browsers.

CDP is supported on Microsoft Edge and Chrome. Firefox only partially supports CDP API.

Examples

CDP allows the user to do several things with the Chrome DevTools, we will describe some examples:

Listen to console logs

In this example, we will print the console logs of the browser.

Console logs test 
	private WebDriver driver;

    @BeforeEach
    void setUp() throws MalformedURLException {
        DesiredCapabilities dc = new DesiredCapabilities();
        dc.setCapability(CapabilityType.BROWSER_NAME, Browser.CHROME.browserName());
        dc.setCapability("accessKey", <ACCESS_KEY>);

        driver = new RemoteWebDriver(new URL(<CLOUD_URL>), dc);
        driver.manage().timeouts().implicitlyWait(Duration.ofSeconds(10));
    }
	
	@Test
    void consoleLogsTest() {
        driver = new Augmenter().augment(driver);
        DevTools devTools = ((HasDevTools) 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");
    }

	@AfterEach
    public void tearDown() {
        System.out.println("Report URL: "+ ((HasCapabilities) driver).getCapabilities().getCapability("reportUrl"));
        driver.quit();
    }

Change Geolocation

In this example, we will change the geolocation of the browser.

Geolocation test 
	private WebDriver driver;

    @BeforeEach
    void setUp() throws MalformedURLException {
        DesiredCapabilities dc = new DesiredCapabilities();
        dc.setCapability(CapabilityType.BROWSER_NAME, Browser.CHROME.browserName());
        dc.setCapability("accessKey", <ACCESS_KEY>);

        driver = new RemoteWebDriver(new URL(<CLOUD_URL>), dc);
        driver.manage().timeouts().implicitlyWait(Duration.ofSeconds(10));
    }
	
	@Test
    void geolocationTest() {
        double expectedLatitude = 52.5043;
        double expectedLongitude = 13.4501;

        driver = new Augmenter().augment(driver);
        driver.get("https://my-location.org/");

        // Change geolocation
        DevTools devTools = ((HasDevTools) driver).getDevTools();
        devTools.createSession();
        devTools.send(Emulation.setGeolocationOverride(Optional.of(expectedLatitude),
                Optional.of(expectedLongitude),
                Optional.of(1)));

        driver.get("https://my-location.org/");

        // Extract new geolocation
        double actualLatitude = Double.parseDouble(driver.findElement(By.xpath("//*[@id='latitude']")).getText());
        double actualLongitude = Double.parseDouble(driver.findElement(By.xpath("//*[@id='longitude']")).getText());

        Assertions.assertEquals(expectedLatitude, actualLatitude, "Wrong latitude");
        Assertions.assertEquals(expectedLongitude, actualLongitude, "Wrong longitude");
    }

	@AfterEach
    public void tearDown() {
        System.out.println("Report URL: "+ ((HasCapabilities) driver).getCapabilities().getCapability("reportUrl"));
        driver.quit();
    }

Network interception

In this example, we will intercept network communication with the browser to show a message that we want.

Network interception test 
	private WebDriver driver;

    @BeforeEach
    void setUp() throws MalformedURLException {
        DesiredCapabilities dc = new DesiredCapabilities();
        dc.setCapability(CapabilityType.BROWSER_NAME, Browser.CHROME.browserName());
        dc.setCapability("accessKey", <ACCESS_KEY>);

        driver = new RemoteWebDriver(new URL(<CLOUD_URL>), dc);
        driver.manage().timeouts().implicitlyWait(Duration.ofSeconds(10));
    }
	
	@Test
    void networkInterceptionTest() {
		driver = new Augmenter().augment(driver);
        NetworkInterceptor interceptor = new NetworkInterceptor(
      	driver,
      	Route.matching(req -> true)
        	.to(() -> req -> new HttpResponse()
          	.setStatus(200)
          	.addHeader("Content-Type", MediaType.HTML_UTF_8.toString())
          	.setContent(utf8String("Creamy, delicious cheese!"))));

  		driver.get("https://example-sausages-site.com");

    	String source = driver.getPageSource();
		Assertions.assertTrue(source.contains("delicious cheese!"));
    }

	@AfterEach
    public void tearDown() {
        System.out.println("Report URL: "+ ((HasCapabilities) driver).getCapabilities().getCapability("reportUrl"));
        driver.quit();
    }
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