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Test Automation

Software Testing.

Test strategy from first principles — the test pyramid, test doubles, coverage that means something, and flake control.

1 Beginner 1 Intermediate 1 Advanced

Beginner

Start here — no prior experience needed

1 lesson
testing beginner
5 min read

Testing Strategy & Test Pyramid (Beginner)

Learn how to choose the right tests: unit, integration, end-to-end—plus reliability and speed tradeoffs.

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Intermediate

For developers with core concepts down

1 lesson
testing intermediate
5 min read

Test Doubles & Dependency Boundaries (Intermediate)

Learn when to mock vs stub vs fake, and how to structure code so tests stay reliable.

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Advanced

Production-grade patterns for experienced engineers

1 lesson
testing advanced
5 min read

Flaky Tests Diagnosis & Stabilization (Advanced)

Learn to detect flakiness causes, control time/async behavior, and make CI reliable.

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