Extensions & Advanced Features — quiz

JUnit 4 used Rules (e.g., @Rule TemporaryFolder) for cross-cutting behaviour. What is the JUnit 5 equivalent mechanism?

• @ClassRule annotations on static fields
• The Extension API — implement interfaces like BeforeEachCallback, AfterEachCallback, or ParameterResolver and register with @ExtendWith
• AOP aspects woven at compile time via a JUnit 5 agent
• TestWatcher classes configured in a properties file