unit-test-application-events

Test Spring application events by publishing events via ApplicationEventPublisher, capturing them with ArgumentCaptor, and asserting that @EventListener methods respond as expected. This validates event propagation in isolated, fast unit tests without requiring a full application context.

Yes. This Skill supports testing both synchronous and asynchronous event handling patterns. Unit tests can verify listener invocation and side effects in both scenarios, ensuring your event-driven architecture behaves correctly under both modes.

Mock ApplicationEventPublisher using standard mocking frameworks, then use ArgumentCaptor to capture published events. Assert that the correct events were published and that listeners responded appropriately, validating publisher behavior in isolation.

After publishing an event in your unit test, assert that the listener's side effects occurred as expected. Use mocks and spies to track method calls and state changes triggered by @EventListener handlers.

No. Unit tests validate ApplicationEvent publishing and listener invocation in isolated tests without a full context. This approach is faster and more focused than integration tests, making it ideal for rapid feedback.