There are three ways to run JUnit Test Cases or Test Suites in Eclipse with JUnit plugin: org.junit_3.8.1.
1. You can right click on the test case class or test suite class and select Run As > JUnit Test.
2. You can select a test case or suite and click the arrow on the icon or select Run from the toolbar, and select Run As > JUnit Test.
3. You can select a test case or suite and click the arrow on the icon or select Run from the toolbar, and select Run... From here you will create a new JUnit test configuration, and name it. You can choose to run a single test case, or run all test cases in a project or folder.