TestNG is a popular testing framework for Java that can be seamlessly integrated with the Eclipse IDE for writing and running tests. Here’s a step-by-step guide on how to set up and use TestNG in Eclipse:

1. Install Eclipse:

• If you don’t already have Eclipse installed, download and install it from the official Eclipse website (https://www.eclipse.org/downloads/).

2. Install the TestNG Plugin:

• Open Eclipse.
• Go to “Help” > “Eclipse Marketplace.”
• In the “Eclipse Marketplace” dialog, search for “TestNG” in the search bar.
• Click the “Go” button to search for the TestNG plugin.
• Install the “TestNG for Eclipse” plugin by clicking the “Install” button next to it.
• Follow the on-screen instructions to complete the installation.

3. Create a New Java Project:

• In Eclipse, go to “File” > “New” > “Java Project.”
• Give your project a name and click “Finish.”

4. Create a TestNG Class:

• Right-click on the “src” folder in your project.
• Go to “New” > “Other” > “TestNG” > “TestNG Class.”
• Give your TestNG class a name and click “Finish.”

5. Write TestNG Test Methods:

• Inside your TestNG class, you can write test methods and annotate them with TestNG annotations such as @Test, @BeforeClass, @AfterClass, @BeforeMethod, and @AfterMethod. These annotations define the test methods and their execution order.

6. Run TestNG Tests:

• Right-click on your TestNG class or the test suite XML file (if you’re using XML test suite configuration) in the Eclipse Project Explorer.
• Choose “Run As” > “TestNG Test.”

7. View TestNG Results:

• After running your TestNG tests, Eclipse will display the results in the “TestNG” view. If you don’t see this view, you can open it by going to “Window” > “Show View” > “Other” > “TestNG” > “TestNG.”

8. TestNG Configuration:

• You can customize your TestNG configuration by creating an XML suite file (e.g., testng.xml) to define test suites, test groups, and test parameters. You can then run the XML file as a TestNG test.

9. TestNG Reporting:

• TestNG provides detailed reports by default. You can find HTML test reports in the test-output directory of your project.