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Posts Tagged ‘ emulation vs real device ’

Emulate mobile and tablet devices with ChromeDriver

Desktop version of Google Chrome allows to users to open webpages in mobile view. This means that you can emulate browsing on devices like Google Nexus 5, Apple iPhone 6 etc. You can find this feature in developer tools by clicking on the mobile icon.

Mobile emulation button

Mobile emulation button

Now ChromeDriver allows to use device emulation in automated tests also. This feature speeds up web development, allows developers to quickly test how a website will render on a mobile device, without requiring a real device or a virtual machine. You can find more information about it on the following link The setup is very easy and it’s working really well. Below you can find a little test case which will introduce to you how to use ChromeDriver for emulate a mobile device and tablet. The test case simply enters “what is my browser” into the google search page, clicks on the first result and checks the device type what will be present on the website.

@DataProvider(name = "deviceName")
	public Object[][] deviceNames(){
		return new Object[][] {
				{"Google Nexus 5", "LG Nexus 5"},
				{"Apple iPhone 6", "Apple iPhone"},
				{"Google Nexus 10", "Samsung Nexus 10"}

	@Test(dataProvider = "deviceName")
	public void mobileEmulation(String deviceName, String deviceNameWhatIsMyBrowser){
		Map<String, String> mobileEmulation = new HashMap<String, String>();
		mobileEmulation.put("deviceName", deviceName);

		Map<String, Object> chromeOptions = new HashMap<String, Object>();
		chromeOptions.put("mobileEmulation", mobileEmulation);
		DesiredCapabilities capabilities =;
		capabilities.setCapability(ChromeOptions.CAPABILITY, chromeOptions);
		WebDriver driver = new ChromeDriver(capabilities);

		//Enter my search
		driver.findElement(By.cssSelector("#lst-ib")).sendKeys("what is my browser");
		//Click on search button
		//Click on the first found result
		driver.findElement(By.xpath("//h3[@class='r']/a[text()='What browser am I using? Is my browser up to date? Web browser ...']")).click();
		//Get the device name from the website
		String deviceNameFromWebsite = driver.findElement(By.cssSelector(".string-extra-info")).getText();
		//Check the device name from the website
		Assert.assertEquals(deviceNameFromWebsite, deviceNameWhatIsMyBrowser, "The device name is not the expected one.");