Testing

Evidence that it works, at the level where the evidence is worth its cost.

4 concepts · 145 minutes

• Testing FundamentalsArrange, act, assert — and testing behaviour instead of implementation.
• The Testing PyramidWhat to test at which level, and why 100% unit coverage can still ship a broken app.
• Mocks, Stubs & FakesIsolating the thing under test without mocking so much you test nothing.
• End-to-End TestingDriving the real app like a user — high confidence, high cost, choose the flows carefully.