Testing Tools in Practice
What 100% coverage does not guarantee
중급 · Lessons 30 · Lab 10
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Curriculum
Catch real faults with boundary tests
Test failure paths and side effects in isolation
An access-control test matrix that finds defects
Contract tests for error-response regressions
Reproduce time boundaries without sleeping
Isolate global state in configuration tests
Test the boundary between CORS and authentication
Inject failures to find resource leaks
Make lazy export behavior observable
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