Test¶

Giriş¶

Testing, modern .NET uygulamalarında code quality, reliability ve maintainability için kritik öneme sahiptir. Mid-level geliştiriciler için comprehensive testing strategies, test-driven development (TDD), mocking, integration testing ve test coverage konularında uzmanlaşmak, production-ready uygulamalar geliştirmek için gereklidir. Bu bölüm, unit testing, TDD, mocking, integration testing, test coverage ve testing best practices konularını kapsar.

Kapsanan Konular¶

1. Unit Testing¶

Unit test yazımı, test frameworks, ve unit testing best practices.

Öğrenilecekler: - Unit test principles - Test frameworks (xUnit, NUnit, MSTest) - Test organization - Test naming conventions - Test isolation

2. Test Driven Development (TDD)¶

TDD cycle, red-green-refactor, ve TDD best practices.

Öğrenilecekler: - TDD cycle - Red-Green-Refactor - Test-first development - Behavior-driven development - TDD benefits

3. Mocking¶

Mock objects, test doubles, ve mocking frameworks.

Öğrenilecekler: - Mock vs Stub vs Fake - Mocking frameworks (Moq, NSubstitute) - Mock verification - Mock setup - Mock best practices

4. Integration Testing¶

Integration test yazımı, test databases, ve integration testing strategies.

Öğrenilecekler: - Integration test setup - Test database management - External service testing - API testing - End-to-end testing

5. Test Coverage¶

Code coverage measurement, coverage analysis, ve coverage improvement.

Öğrenilecekler: - Coverage metrics - Coverage tools - Coverage analysis - Coverage improvement - Coverage goals

6. Testing Best Practices¶

Testing strategies, test maintenance, ve testing automation.

Öğrenilecekler: - Test organization - Test maintenance - Test automation - CI/CD integration - Testing metrics

Neden Önemli?¶

1. Code Quality¶

Bug prevention
Code reliability
Maintainability
Refactoring confidence

2. Development Efficiency¶

Faster development cycles
Reduced debugging time
Better design decisions
Documentation through tests

3. Business Confidence¶

Reduced production bugs
Faster feature delivery
Better user experience
Cost reduction

4. Team Collaboration¶

Shared understanding
Code review support
Knowledge transfer
Onboarding support

Mülakat Soruları¶

Temel Sorular¶

Unit test nedir?
Cevap: Individual unit testing, isolated testing, fast execution, reliable results.
TDD nedir?
Cevap: Test-first development, red-green-refactor cycle, behavior specification.
Mock nedir?
Cevap: Test double, simulated behavior, dependency isolation, controlled testing.
Integration test nedir?
Cevap: Component interaction testing, external dependency testing, system testing.
Test coverage nedir?
Cevap: Code execution measurement, coverage metrics, quality indicator.

Teknik Sorular¶

Unit test nasıl yazılır?
Cevap: Arrange-Act-Assert pattern, test isolation, dependency injection.
TDD cycle nasıl çalışır?
Cevap: Write failing test, write code, refactor, repeat.
Mock object nasıl oluşturulur?
Cevap: Mock framework usage, behavior setup, verification.
Integration test nasıl yazılır?
Cevap: Test environment setup, external dependency management.
Test coverage nasıl ölçülür?
Cevap: Coverage tools, metrics analysis, improvement strategies.

Best Practices¶

1. Test Design¶

Follow AAA pattern
Write readable tests
Use descriptive names
Keep tests simple
Test one thing at a time

2. Test Organization¶

Organize by feature
Use consistent naming
Group related tests
Maintain test structure
Plan for scalability

3. Test Maintenance¶

Keep tests up to date
Refactor tests regularly
Remove obsolete tests
Monitor test performance
Plan for test evolution

4. Test Automation¶

Automate test execution
Integrate with CI/CD
Monitor test results
Track test metrics
Plan for continuous improvement

5. Test Quality¶

Write meaningful tests
Avoid test smells
Use appropriate assertions
Handle edge cases
Plan for test coverage