JUnit 4 vs JUnit 5 (Jupiter) differences - Quick Revision & Key Differences

Recall & Review

beginner

What is the main architectural difference between JUnit 4 and JUnit 5?

JUnit 4 is a single monolithic framework, while JUnit 5 is modular with three sub-projects: Jupiter (new programming model), Vintage (to run JUnit 3 and 4 tests), and Platform (test engine).

beginner

How do you write a test method in JUnit 5 compared to JUnit 4?

In JUnit 4, use @Test from org.junit.Test. In JUnit 5, use @Test from org.junit.jupiter.api.Test. JUnit 5 supports more flexible annotations and method signatures.

beginner

Which annotation replaces @Before and @After in JUnit 5?

JUnit 5 replaces @Before with @BeforeEach and @After with @AfterEach for better clarity on when methods run.

intermediate

What new features does JUnit 5 provide that JUnit 4 lacks?

JUnit 5 supports dynamic tests, nested tests, improved assertions, better extension model, and parameterized tests with more options.

intermediate

Can JUnit 5 run JUnit 4 tests?

Yes, JUnit 5 includes the Vintage engine to run JUnit 3 and 4 tests, allowing gradual migration.

Which JUnit version introduced the @BeforeEach annotation?

A JUnit 5

B JUnit 3

C JUnit 4

D JUnit 6

@BeforeEach is a JUnit 5 annotation replacing JUnit 4's @Before.

What is the purpose of the JUnit Vintage engine?

A To run JUnit 5 tests

B To run JUnit 3 and 4 tests

C To run tests in parallel

D To generate test reports

The Vintage engine allows running older JUnit 3 and 4 tests on the JUnit 5 platform.

Which package contains the JUnit 5 @Test annotation?

A org.junit.Test

B org.junit.platform.Test

C org.junit4.api.Test

D org.junit.jupiter.api.Test

JUnit 5's @Test annotation is in org.junit.jupiter.api package.

Which feature is new in JUnit 5 compared to JUnit 4?

A Dynamic tests

B Parameterized tests

C Test suites

D Assertions

Dynamic tests are a new feature introduced in JUnit 5.

How does JUnit 5 improve test lifecycle annotations?

A By using XML configuration

B By removing them

C By renaming and adding more specific annotations like @BeforeEach

D By requiring inheritance

JUnit 5 renames lifecycle annotations for clarity and adds new ones like @BeforeEach and @AfterEach.

Explain the modular architecture of JUnit 5 and how it differs from JUnit 4.

Think about how JUnit 5 separates concerns into different parts.

Describe the key annotation changes from JUnit 4 to JUnit 5 and their benefits.

Focus on lifecycle and test method annotations.