Giới thiệu Selenium Webdriver

<dependencies>
    <dependency>
        <groupId>org.seleniumhq.selenium</groupId>
        <artifactId>selenium-server</artifactId>
        <version>3.0.1</version>
    </dependency>
</dependencies>

package vn.viettuts.selenium;

import java.util.concurrent.TimeUnit;

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

public class WebDriverDemo {
    public static void main(String[] args) {
        // set chrome driver
        System.setProperty("webdriver.chrome.driver", 
                "D:\\SeleniumWebdriver\\chromedriver.exe");
        WebDriver driver = new ChromeDriver();
        
        // wait for 10 seconds before throwing exception
        driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);

        // open website
        driver.get("http://www.calculator.net/");

        // Maximize the browser
        driver.manage().window().maximize();

        // Click on Math Calculators
        driver.findElement(By.xpath(".//td[3]/div[2]/a")).click();

        // Click on Percentage Calculator
        driver.findElement(By.xpath(".//a[@href='/percent-calculator.html']"
                + "[contains(text(),'Percentage Calculator')]")).click();

        // Enter value 10 in the first number of the percent Calculator
        driver.findElement(By.id("cpar1")).sendKeys("10");

        // Enter value 50 in the second number of the percent Calculator
        driver.findElement(By.id("cpar2")).sendKeys("50");

        // Click Calculate Button
        driver.findElement(By.xpath(".//*[@id = 'content']"
                + "/table[1]/tbody/tr[2]/td/input[2]")).click();

        // Get the Result Text based on its xpath
        String result = driver.findElement(
                By.xpath(".//p[@class='verybigtext']")).getText();

        // Print a Log In message to the screen
        System.out.println(" The Result is " + result);

        // Close the Browser.
        driver.close();
    }
}