davideisinger.com

commit 882fbe0bfcb6e6e69044c4035f199a4a6844d7ac
parent cd251de122626ff853ea0de40d66014fac81c5c5
Author: David Eisinger <[email protected]>
Date:   Mon, 22 May 2023 22:23:30 -0400

Coverage note

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content/notes/good-tests/index.md
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3
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1 file changed, 3 insertions(+), 0 deletions(-)
diff --git a/content/notes/good-tests/index.md b/content/notes/good-tests/index.md
@@ -30,6 +30,9 @@ _(Notes for a Viget article I'm putting together)_
 * Coverage
   * We shoot for 100% in SimpleCov (So all the Ruby is tested)
   * 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
 * Flaky tests are bad
   * They eat up a lot of development time (esp. as build times increase)