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Coverage note

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David Eisinger
2023-05-22 22:23:30 -04:00
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content/notes/good-tests/index.md
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@@ -30,6 +30,9 @@ _(Notes for a Viget article I'm putting together)_
* Coverage * Coverage
* We shoot for 100% in SimpleCov (So all the Ruby is tested) * We shoot for 100% in SimpleCov (So all the Ruby is tested)
* Some consider this too high or too burdensome -- I don't * Some consider this too high or too burdensome -- I don't
* If it's 100%, you instantly know if you have any untested code
* If it's, say, 94%, and you add 100 lines, six of those can be untested -- hope they're perfect!
* In other words, at less than 100% coverage, you don't know if your new feature is fully covered or not
* Occasionally you have to ignore some code -- e.g. something that only runs in production * Occasionally you have to ignore some code -- e.g. something that only runs in production
* Flaky tests are bad * Flaky tests are bad
* They eat up a lot of development time (esp. as build times increase) * They eat up a lot of development time (esp. as build times increase)