What is Test Automation Pyramid?
Updated Apr 28, 2026
Short answer
A strategy suggesting more unit tests at the base, fewer integration tests, and even fewer UI tests at the top.
Deep explanation
Intermediate testing involves strategy and automation. TDD changes the workflow to 'Test First', which improves code quality and design. Integration testing moves away from units to verify the 'contract' between services. At this level, understanding mocks and stubs is vital for isolating dependencies.
Real-world example
Automating a checkout flow using Selenium or Playwright where the database is mocked to speed up execution.
Common mistakes
- Writing 'Brittle' UI tests that break every time a CSS class changes.
Follow-up questions
- What is 'shifting left' in testing?