@Test annotation in JUnit - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the @Test annotation in JUnit?

The @Test annotation marks a method as a test method that JUnit will run automatically during testing.

beginner

Can a method without @Test annotation be run as a test in JUnit?

No, only methods annotated with @Test are recognized and run as tests by JUnit.

intermediate

How do you indicate that a test method is expected to throw an exception using @Test?

You add the expected parameter to @Test, for example: @Test(expected = IllegalArgumentException.class).

beginner

What happens if a test method annotated with @Test fails an assertion?

JUnit marks the test as failed and reports the failure in the test results.

intermediate

Is it possible to run a test method multiple times automatically using @Test alone?

No, @Test alone does not support running a test multiple times. You need additional tools or annotations like @RepeatedTest in JUnit 5.

What does the @Test annotation do in JUnit?

A Marks a method to run before all tests

B Marks a method to be ignored

C Marks a method as private

D Marks a method to be run as a test

@Test tells JUnit to run the method as a test.

How do you specify that a test should expect an exception using @Test?

A Use <code>@Test(expected = Exception.class)</code>

B Use <code>@Test(timeout = 1000)</code>

C Use <code>@Test(ignore = true)</code>

D Use <code>@Test(repeat = 3)</code>

The expected parameter defines the exception the test should expect.

If a method is not annotated with @Test, what happens when you run JUnit tests?

A The method runs as a test anyway

B The method is not run as a test

C JUnit throws an error

D The method runs before tests

Only methods with @Test are run as tests.

What is the default behavior if a test method annotated with @Test throws no exception and all assertions pass?

A Test passes

B Test fails

C Test is ignored

D Test is skipped

If no exceptions occur and assertions pass, the test passes.

Which JUnit annotation is used to run a test multiple times, not @Test?

A <code>@Test(repeat = 3)</code>

B <code>@TestMultiple</code>

C <code>@RepeatedTest</code>

D <code>@RunMultiple</code>

@RepeatedTest is used in JUnit 5 to run tests multiple times.

Explain the role of the @Test annotation in JUnit testing.

Think about how JUnit knows which methods to test.

Describe how you can use the @Test annotation to check if a method throws an expected exception.

Focus on the parameters inside the annotation.