Integration Tests

Purpose

Generate co-located integration tests for CQRS handlers with mocked dependencies, test fixtures, and real database operations using Jest + Testcontainers.

Why Jest Instead of node:test?

This repository uses Jest for ALL testing instead of Node.js's built-in node:test runner:

• Issue: nestjs/nest#14130 - NestJS @nestjs/testing is incompatible with node:test
• Impact: node:test cannot properly inject QueryBus, CommandBus, or other NestJS providers
• Solution: Jest provides full compatibility with NestJS's testing utilities and DI system

When to Use