https://blog.vnykmshr.com/writing/tags/mocks/Recent content in Mocks on vnykmshrHugoenTue, 21 Apr 2026 00:00:00 +0000https://blog.vnykmshr.com/writing/the-wrong-test/Tue, 21 Apr 2026 00:00:00 +0000https://blog.vnykmshr.com/writing/the-wrong-test/<p>100% test coverage and a broken migration. Same week.</p> <p>The suite was green. CI was green. The deploy was green. The migration ran on a Tuesday afternoon and dropped a column something was still reading from. Every test that would have caught it was mocked against a schema the fixture hadn&rsquo;t updated since the quarter before last. The mocks still returned 200. The database didn&rsquo;t.</p> <p>Coverage measures what you ran. It does not measure what will happen.</p>