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My tests are my safety net. With them I can refactor with confidence, knowing that I’m keeping the functionality I intended. With them, I can grow my codebase, knowing that I’m not introducing regression errors. How do I have confidence that my safety net is good enough? One metric I can use to help with this is code coverage. It answers the question “When I run my tests, how much of my application code executed?”. It’s a somewhat crude metric—telling me how broad the net is not how strong—but it’s a good p
See how happy people are when they have a safety net?