feat: flaky test detection from cached history#26
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Detects tests that inconsistently pass/fail across recent runs. Adds a 'Potentially Flaky Tests' section to CI summary and a compact warning line to PR comments. Requires >= 5 history entries; threshold configurable via flaky-threshold input (default: 2 flips).
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Replace bare parseInt with a dedicated parser that warns on invalid inputs (non-integer, negative) and falls back to the default of 2.
Test names containing backticks or newlines would produce malformed markdown. toInlineCode normalises newlines and uses a fence of n+1 backticks to safely wrap any content.
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Summary
Detects tests that inconsistently pass and fail across recent CI runs, flagging them as potentially flaky. Adds a "Potentially Flaky Tests" section to the CI summary and a compact warning line to PR comments.
Changes
FlakyTestInfoandFlakyDetectionResulttypes tosrc/history/types.tsflaky-thresholdinput toaction.yml(default: 2 flips, in last 10 runs)buildTestKeyfromcomparison.tsfor reusedetectFlakyTests()as a pure function insrc/history/flaky-detection.tsskippedstatuses; treatserroredas failingrenderFlakySection()to CI summary — table with test, suite, rate, flips, emoji timelinerenderFlakyCompact()to PR comments — compact⚠️ N flaky tests: name1, name2lineindex.ts: requires ≥5 history entries; errors caught withcore.debug()Test plan
flaky-threshold: 5raises the bar so fewer tests are flagged