Unit Testing Application Events Overview Provides actionable patterns for testing Spring publishers and consumers using JUnit 5 and Mockito — without booting the full Spring context. When to Use - Writing unit tests for event publishers or listeners - Verifying that an event was published with correct payload - Testing method invocation and side effects - Testing event propagation through multiple listeners - Validating async event handling ( + ) - Mocking in service tests Instructions 1. Add test dependencies : , JUnit 5, Mockito, AssertJ 2. Mock ApplicationEventPublisher : use on the publis…