LangChain4J Testing Strategies Overview Patterns for unit testing with mocks, integration testing with Testcontainers, and end-to-end validation of RAG systems, AI Services, and tool execution. When to Use - Unit testing AI services : When you need fast, isolated tests for services using LangChain4j AiServices - Integration testing LangChain4j components : When testing real ChatModel, EmbeddingModel, or RAG pipelines with Testcontainers - Mocking AI models : When you need deterministic responses without calling external APIs - Testing LLM-based Java applications : When validating RAG workflow…