How to Automate Login Functionality with Selenium and Java

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How to Automate Login Functionality with Selenium and Java

One of the most common and crucial use cases in automation testing is automating a login functionality. Here’s a step-by-step guide on how to automate the login process using Selenium WebDriver and Java.

✅ Step 1: Set Up the Project

First, make sure you have the following installed:

Java JDK

Eclipse IDE or IntelliJ

Selenium WebDriver library

Browser drivers (e.g., ChromeDriver)

Create a new Java project and add the Selenium WebDriver JAR files to your project’s build path.

✅ Step 2: Write the Login Test Script

Here’s a basic example of how to automate login functionality:

java

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import org.openqa.selenium.By;

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.WebElement;

import org.openqa.selenium.chrome.ChromeDriver;

public class LoginAutomation {

    public static void main(String[] args) {

        System.setProperty("webdriver.chrome.driver", "path/to/chromedriver");

        WebDriver driver = new ChromeDriver();

        driver.get("https://example.com/login");

        // Locate elements

        WebElement username = driver.findElement(By.id("username"));

        WebElement password = driver.findElement(By.id("password"));

        WebElement loginBtn = driver.findElement(By.id("loginButton"));

        // Enter credentials

        username.sendKeys("yourUsername");

        password.sendKeys("yourPassword");

        // Click login

        loginBtn.click();

        // Add verification (optional)

        String expectedUrl = "https://example.com/dashboard";

        if (driver.getCurrentUrl().equals(expectedUrl)) {

            System.out.println("Login Successful!");

        } else {

            System.out.println("Login Failed!");

        }

        driver.quit();

    }

}

This script opens a browser, navigates to the login page, enters credentials, clicks the login button, and checks if the user is redirected to the expected page.

✅ Step 3: Enhance with TestNG

Using TestNG, you can convert this script into a reusable, structured test case with assertions and annotations for better test management.

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