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Test Metrics
16.1🔒Test Pass RateWhat it measures: The percentage of tests that pass in a given execution.
16.2🔒Automation RatioKEY FORMULA: Automation Ratio = (Automated Test Cases / Total Test Cases) x 100
16.3🔒Flaky Test RateKEY FORMULA: Flaky Test Rate = (Tests with inconsistent results / Total tests) x 100
16.4🔒Test Execution Time TrendsTrack execution time by test level over time:
16.5🔒Q&ASelf-Assessment Quiz: Chapter 161. What is a healthy test pass rate? 2. What automation ratio indicates "good balance"? 3. What is the flakiness death spiral? 4. Why…
16.6🔒Key Takeaways- Test pass rate above 98% indicates suite reliability; below 95% demands investigation - Automation ratio should grow over time; track…
16.7🔒Hands-On ExercisesExercise 16.1 (Beginner): Measure your flaky test rate. List the top 5 flakiest tests.
16.8🔒Q&AResume phrasing- Maintained a 98.6% test pass rate across 500+ automated tests by implementing a flakiness quarantine policy and root-cause analysis…
16.9🔒Q&ACover letter framingI monitor four test health metrics as a system: pass rate (is the suite reliable?), automation ratio (are we automating fast enough?)…
16.10🔒Q&AInterview framing"I approach test metrics by tracking four dimensions simultaneously: pass rate for reliability, automation ratio for coverage maturity…
16.11🔒Q&AWhat not to say- "Our pass rate is 95%, which is fine" -- 95% means 1 in 20 tests is failing; investigate whether those failures are real bugs or…
16.12🔒Q&AQuestion 1Prompt: Your test pass rate dropped from 98% to 93% over the last 3 sprints. How do you diagnose whether this is a product quality problem…
16.13🔒Q&AQuestion 2Prompt: Describe the "flakiness death spiral." Have you experienced it? How did you stop it? What a strong answer should cover: - Flaky…
16.14🔒Q&AQuestion 3Prompt: Your automation ratio is 45%. Your manager says it should be 80% by end of quarter. Is this realistic? How do you evaluate and…