Mohammad Daneshmand’s Post

6+ years with PHPUnit taught me one major lesson. Real-world bugs usually don't hide in the "complex" parts of a system. They hide in the "boring" ones: a simple validation rule, a tiny branching condition, or a basic formatter. After years of testing PHP applications, here are my 3 golden rules: ✅ Test Behavior, Not Code: Don't just check if a method was called. Check if the business logic actually holds up. ✅ Isolation is King: If your test touches the database, it’s not a Unit Test anymore. Keep them fast, pure, and independent. ✅ Tests are Documentation: A test named it_throws_exception_when_user_not_found is worth more than a dozen comments. Unit testing isn't just about catching bugs; it’s about documenting your system’s expectations in an executable form. #PHP #PHPUnit #TDD

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