unit-test-caching

SKILL.md

Testing Spring Cache annotations without external infrastructure using in-memory cache managers.

Covers testing @Cacheable, @CacheEvict, and @CachePut annotations with patterns for verifying cache hits, misses, and invalidation

Uses ConcurrentMapCacheManager for fast, isolated unit tests instead of Redis or other external caches

Includes verification strategies via mock call counts, conditional caching with unless and condition parameters, and custom cache key generation with SpEL expressions

Provides setup examples for Maven and Gradle, plus complete test patterns for cache behavior, eviction, updates, and edge cases like null result handling

Unit Testing Spring Caching

Overview

This skill provides patterns for unit testing Spring caching annotations (@Cacheable, @CacheEvict, @CachePut) without full Spring context. It covers cache hits/misses, invalidation, key generation, and conditional caching using in-memory ConcurrentMapCacheManager.

When to Use

Writing unit tests for @Cacheable method behavior

Verifying @CacheEvict cache invalidation works correctly

Testing @CachePut cache updates

Validating cache key generation from SpEL expressions

Testing conditional caching with unless/condition parameters

Mocking cache managers in fast unit tests without Redis

Instructions