Unit Testing Service Layer with Mockito Overview Provides patterns for unit testing classes using Mockito. Mocks repository calls, verifies method invocations, tests exception scenarios, and stubs external API responses. Enables fast, isolated tests without Spring container or database. When to Use - Testing business logic in classes - Mocking repository and external client dependencies - Verifying service interactions with mocked collaborators - Testing error handling and edge cases in services - Writing fast, isolated unit tests (no database, no API calls) Instructions Follow this workflow…