import org.junit.After;

import org.junit.Before;

import org.junit.Test;

import org.openqa.selenium.JavascriptExecutor;

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.WebElement;

import org.openqa.selenium.chrome.ChromeDriver;

import static java.lang.System.setProperty;

import static org.junit.Assert.assertEquals;

import static org.openqa.selenium.By.id;

import static org.openqa.selenium.By.tagName;

import static org.openqa.selenium.support.PageFactory.initElements;

public class ShadowDomExampleTest {

private static final String CHROMEDRIVER_PATH = "PATH_TO_YOUR_CHROMEDRIVER.EXE";

private WebDriver driver;

private JavascriptExecutor js;

public ShadowDomExampleTest() {

initElements(driver, this);

}

@Before

public void setUpChromeBrowser() {

setProperty("webdriver.chrome.driver", CHROMEDRIVER_PATH + "chromedriver.exe");

driver = new ChromeDriver();

}

@Test

public void verifySettingsHeader() {

driver.get("chrome://settings/");

WebElement root1 = driver.findElement(tagName("settings-ui"));

WebElement shadowRoot1 = getShadowRoot(root1);

WebElement root2 = shadowRoot1.findElement(tagName("cr-toolbar"));

WebElement shadowRoot2 = getShadowRoot(root2);

WebElement root3 = shadowRoot2.findElement(id("leftSpacer"));

assertEquals("Settings", root3.getText());

}

@After

public void quitBrowser() {

driver.quit();

}

private WebElement getShadowRoot(WebElement element) {

js = (JavascriptExecutor) driver;

return (WebElement) js.executeScript("return arguments[0].shadowRoot", element);

}

}