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Mistake Clinic

Module-Specific Mistake Radar​

  • Treating JSON parsing as full validation: test wrong status and wrong types.
  • Converting every exception into empty data: distinguish absence from failure.
  • Claiming a fixture check proves a network exchange: record the actual local run.
  • Using the teaching server for deployment: keep the exercise loopback-only.

Practice Mistake Checks​

Choose one mistake, predict a concrete failing result and add the smallest case that distinguishes it from correct behavior. Repair only after recording the observation. Re-run the affected checks and explain what the test still cannot prove. Keep the original failure in your private evidence record.