UNIT-TESTING-BASICS5 MIN READ
Walk A Vague Bug Into A Unit Test
Decompose a vague bug report into Arrange, Act, and Assert choices for a regression unit test.
Bug report A starter-plan admin invited an 11th active user. The product rule says the account should stop at 10. The test should prove the quota rule directly before you test the whole admin screen. AAA narrowing Arrange -> Act -> Assert Build the smallest world, trigger one behavior, and check the result that matters. Broad Click through admin, invite, email, and billing The failure points to the quota rule. The narrower the proof, the clearer the failure. 01 Arrange 02 Act 03 Assert 04 Fresh case
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