Writing.
Occasional notes about suites, selection and the parts of continuous integration nobody puts on a slide.
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Coverage tells you what ran, not what mattered
Line coverage and a test selection map are built from the same instrumentation and answer opposite questions. Confusing them is how teams end up skipping the wrong things.
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What a red build is worth once nobody believes it
A failing test is a claim about your code. A test that fails at random is a claim about nothing, and it costs more than the minutes it burns.
The shortest post we could write about your suite is its skip list.
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