BeforeEachCallback and AfterEachCallback in JUnit - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the BeforeEachCallback interface in JUnit?

It allows you to run custom code before each test method is executed, such as setting up test data or initializing resources.

beginner

What does the AfterEachCallback interface do in JUnit?

It lets you run custom code after each test method finishes, useful for cleaning up resources or resetting states.

intermediate

How do BeforeEachCallback and AfterEachCallback relate to test lifecycle?

They hook into the test lifecycle to run code right before and right after each test method, helping manage setup and cleanup automatically.

beginner

Which method must be implemented when using BeforeEachCallback?

You must implement the beforeEach(ExtensionContext context) method to define what happens before each test.

intermediate

What parameter is passed to the afterEach method in AfterEachCallback?

An ExtensionContext object, which provides information about the current test and its environment.

What is the main use of BeforeEachCallback in JUnit?

A Run code before each test method

B Run code after all tests

C Skip a test method

D Run code only once before all tests

BeforeEachCallback runs code before each test method, helping prepare the test environment.

Which method must you override when implementing AfterEachCallback?

A afterEach()

B afterAll()

C beforeAll()

D beforeEach()

The afterEach(ExtensionContext context) method is called after each test method finishes.

What does the ExtensionContext parameter provide in these callbacks?

A User input data

B Database connection

C Test report generation

D Test method details and environment info

ExtensionContext gives info about the current test method and its context.

When is AfterEachCallback code executed?

A Before each test method

B After each test method

C Before all tests

D After all tests

AfterEachCallback runs after each test method to clean up or reset states.

Can BeforeEachCallback and AfterEachCallback be used together?

A Yes, but only in JUnit 4

B No, only one can be used

C Yes, to run setup and cleanup code around each test

D No, they serve the same purpose

They complement each other to manage setup and teardown around each test method.

Explain how BeforeEachCallback and AfterEachCallback help manage test setup and cleanup in JUnit.

Think about what happens before and after each test method.

Describe the role of the ExtensionContext parameter in the methods of BeforeEachCallback and AfterEachCallback.

It helps the callback know about the test it is running around.