What are Test Suites in Junit 5?

A test suite is used to group together and run a number of unit test cases. To run the suite tests in JUnit, both the @RunWith and @Suite annotations are used.

1. @RunWith has been replaced with @ExtendWith annotation, but it is still used for backward compatibility.

2. When a class annotated @RunWith(Suite.class) is run, the SuiteClasses annotation specifies which classes should be run.

With the above annotations, the suite's test classes will begin executing one by one.

Below are the steps to create test suites and test runner.

• Step 1: First, create a simple test class; for example, DemoTest and annotate a method with @test.

• Step 2: Create a new test class; for example, DemoTest1 and a method annotated with @test.

• Step 3: To create a testSuite, annotate the class with @RunWith(Suite.class) and @SuiteClasses(class1.class2.....) first.

• Step 4: To run our test suite, create a Test Runner class.

JUnit test suite increases developer and tester productivity by allowing them to test multiple application scenarios in a single shot rather than testing them individually.