You can have 100% Code Coverage and still have ticking time bombs in your code. 💣 You can have 100% Code Coverage and still have ticking time bombs in your code. 💣 I was listening to a team …

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100% code coverage doesn't guarantee bug-free software. Coverage only measures which lines execute during tests, not whether those lines handle all inputs correctly. A key pitfall is happy path testing — writing tests only for expected inputs while ignoring edge cases like empty arrays, nil values, or malformed strings. Writing tests that intentionally misuse functions protects against future code changes and makes software more resilient. Coverage is a directional metric, not a quality guarantee.

You can have 100% Code Coverage and still have ticking time bombs in your code. 💣

👨‍🏫 Understanding How Coverage Is Measured

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