Xcode Code Coverage: Measuring Test Effectiveness
Code coverage isn't a grade, but a map of untested code. Use it in Xcode to find gaps in your logic before shipping. The footgun: high coverage doesn't mean your tests are good, just that the lines were executed, potentially missing key assertions.
Think of code coverage not as a score, but as a heat map for your codebase. It highlights the 'cold' spots—lines your tests never execute. Enable it in your Xcode scheme to visually identify untested conditional branches or error paths, making it a key part of any CI/CD pipeline. The biggest footgun is chasing 100% coverage, which often leads to trivial tests that check getters/setters but miss complex business logic. Focus on testing behavior, not just executing lines.
Read the original → developer.apple.com
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