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Testing & TDD
Testing Fundamentals & Vitest 4+
Testing Trophy, Vitest ESM architecture, Test Doubles, fake timers, property-based testing
Topic Progress5 lessons
Experience (XP)115 min • +150 XP
Topic Progress0 / 5 (0%)
Lessons in Module (5)
5 lessons in order01
Testing Trophy 2026: Testing Pyramid vs. Testing Trophy
25 min•+30 XP
testing-trophyvitestconfidence-cost
02
Vitest 4+ Deep Dive: Vite-Powered Architecture and Native ESM
25 min•+30 XP
vitestesmworker-threads
03
Clean Test Anatomy and Test Doubles: Mocks, Stubs, and Spies
25 min•+30 XP
test-doublesmocksstubs
04
Testing Asynchronous Code, Timers, and Memory Leaks
20 min•+30 XP
async-testingfake-timersabort-controller
05
Property-Based Testing and Input Fuzzing with fast-check
20 min•+30 XP
property-based-testingfast-checkfuzzing