{
  "instruction": "Isolate test database from production database without mocking",
  "relevant_when": "Agent configures test database setup",
  "context": "Tests should use a separate database (in-memory SQLite with :memory:) or reset state before each test. Never mock the database module (no vi.mock or jest.mock of the db module). Use the real database module with test-specific configuration.",
  "sources": [
    {
      "type": "file",
      "filename": "skills/api-testing-first-steps/SKILL.md",
      "tile": "tessl-labs/api-testing-first-steps@0.1.0"
    }
  ],
  "checklist": [
    {
      "name": "separate-test-db",
      "rule": "Agent uses :memory: SQLite or a separate test database for tests, conditional on NODE_ENV === 'test'",
      "relevant_when": "Agent configures database for testing"
    },
    {
      "name": "reset-before-tests",
      "rule": "Agent resets or cleans database state before each test (beforeEach/beforeAll with schema recreation or transaction BEGIN/ROLLBACK)",
      "relevant_when": "Agent writes test setup"
    },
    {
      "name": "no-database-mock",
      "rule": "Agent does NOT mock or stub the database module (no vi.mock, jest.mock, or manual stubs). Uses the real database module with test configuration.",
      "relevant_when": "Agent writes API integration tests with database"
    }
  ]
}