// Always verify mocks were called as expected
afterEach(() => {
  // Fail if any mock was called unexpectedly
  expect(unexpectedCallsDetected()).toBe(false);
});

// Use strict mocks
const strictMock = jest.fn().mockImplementation(() => {
  throw new Error('Unexpected call');
});

// Always reset mocks
beforeEach(() => {
  jest.clearAllMocks();  // Clears call history
  // or
  jest.resetAllMocks();  // Also resets implementation
});