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Testing Practices

Master advanced testing methodologies and patterns to write better, more maintainable tests. Learn industry-standard practices like TDD and how to use test doubles effectively.

What You'll Learn​

Test-Driven Development (TDD)​

Learn the Red-Green-Refactor cycle and how writing tests first leads to better design.

You'll learn:

  • The TDD workflow
  • Red-Green-Refactor cycle
  • Benefits of TDD
  • Common TDD patterns
  • When to use TDD

Test Doubles​

Master mocks, stubs, spies, and fakes for effective unit testing.

You'll learn:

  • What are test doubles
  • Mocks vs Stubs vs Spies vs Fakes
  • When to use each type
  • Best practices
  • Common pitfalls

Why Advanced Testing Practices Matter​

Code Quality​

  • Better Design - TDD encourages testable, modular code
  • Clear Intent - Tests document expected behavior
  • Faster Feedback - Catch issues early in development

Maintainability​

  • Refactoring Safety - Tests catch regressions
  • Living Documentation - Tests show how code should work
  • Team Alignment - Shared understanding of requirements

Productivity​

  • Faster Debugging - Failing tests pinpoint issues
  • Confidence - Make changes without fear
  • Less Rework - Catch bugs before production

Getting Started​

For Beginners​

  1. Start with Test-Driven Development to understand the TDD workflow
  2. Practice the Red-Green-Refactor cycle
  3. Learn Test Doubles for isolating code under test

For Experienced Developers​

  1. Refine your TDD practice
  2. Master different types of test doubles
  3. Apply patterns to complex scenarios
  4. Mentor others in testing practices

Next Steps​

After mastering testing practices, explore:

  • Language-specific testing - See Languages section
  • Framework testing - See Frameworks section
  • Integration testing - Test components working together
  • E2E testing - Test complete user workflows

Master testing practices to write better code with confidence!