# Why Testing Matters
Go testing is built into the toolchain, so quality checks can run continuously while you develop.
# First Test and Assertions
Use _test.go files and t.Errorf/t.Fatalf appropriately.
# Table-Driven Style
Table-driven tests reduce duplication and improve readability for edge-case coverage.
# Benchmarks and Race Detector
Run go test -bench=. for performance and go test -race for concurrency issues.
# Practice Challenge
Implement FizzBuzz and validate behavior with table-driven tests.
⚡ Key Takeaways
- Use table-driven tests for broad, maintainable coverage
- Use race detector and benchmarks as regular checks
- Prefer deterministic tests through dependency injection