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Introduction: What is Test Coverage, and Why is it Important?

We all know tests are crucial, but how many should you write? Should you aim for 100% coverage or just focus on critical parts? While there’s no definitive answer, tracking your codebase’s test coverage percentage is a valuable guide. Think of it like monitoring your weight: you don’t have to step on the scale every day, but it helps to check in occasionally to ensure you’re on track.