@AfterEach method in JUnit - Cheat Sheet & Quick Revision

Recall & Review

beginner

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

The @AfterEach annotation marks a method to be run after each test method. It is used to clean up or reset resources to keep tests independent.

beginner

When is a method annotated with @AfterEach executed?

It runs immediately after each test method finishes, regardless of whether the test passed or failed.

intermediate

Can multiple methods in the same test class have <code>@AfterEach</code> annotation?

Yes, multiple @AfterEach methods are allowed. They run in an undefined order after each test method.

intermediate

How does @AfterEach differ from @AfterAll in JUnit?

<code>@AfterEach</code> runs after every test method, while <code>@AfterAll</code> runs once after all tests in the class have run.

beginner

Give a simple example of a method using @AfterEach.

Example:<br>

  @AfterEach
  void cleanup() {
    // reset shared resources
  }

What happens if a test method throws an exception? Does the @AfterEach method still run?

A Only if the exception is caught inside the test.

B No, <code>@AfterEach</code> only runs if the test passes.

C Yes, <code>@AfterEach</code> runs even if the test fails or throws an exception.

D It depends on the exception type.

The @AfterEach method always runs after each test method, regardless of test success or failure.

Which annotation runs a method once after all tests in a class have finished?

A @BeforeEach

B @AfterAll

C @AfterEach

D @BeforeAll

@AfterAll runs once after all tests in the class complete.

Can you have more than one @AfterEach method in a test class?

A Only if they are static methods.

B No, only one is allowed.

C Yes, but only if they have different names.

D Yes, multiple are allowed and run in any order.

JUnit allows multiple @AfterEach methods; their execution order is not guaranteed.

What is a common use case for @AfterEach methods?

A To clean up or reset resources after each test.

B To initialize test data before each test.

C To run tests in parallel.

D To skip tests conditionally.

@AfterEach is typically used to clean up or reset shared resources after each test.

If you want to release a database connection after each test, which annotation should you use on the cleanup method?

A @AfterEach

B @BeforeEach

C @BeforeAll

D @AfterAll

Use @AfterEach to release resources like database connections after each test.

Explain the role and timing of the @AfterEach method in JUnit testing.

Think about what happens after every test finishes.

Describe the difference between @AfterEach and @AfterAll annotations.

Consider how often each runs during the test lifecycle.