Clean up shared state between tests

Clean up shared state between tests | BeforeMerge Rules | BeforeMerge

Why this matters

State that survives between tests — DB rows, global singletons, mock call counts, temp files — leaks into later tests and causes flaky, order-dependent failures. Reset everything in setup/teardown hooks.

// Bad — mocks accumulate across tests
const fn = jest.fn();
 
// Good — reset between tests
afterEach(() => { jest.clearAllMocks(); db.reset(); });

Why This Matters

Related Rules

Catch this automatically on every PR

Why this matters