Testing Philosophy & TDD Mastery
Master test-driven development, testing strategies, and quality assurance practices
104 Total Tests97 Passed86% CoverageTDD Workflow
Testing Strategy Pyramid
Interactive testing pyramid with layer exploration
Unit Tests
127 tests • 94% coverage
Integration Tests
43 tests • 87% coverage
End-to-End Tests
18 tests • 76% coverage
Unit Tests
Fast, isolated tests for individual components and business logic
127
Tests
94%
Coverage
0.8s
Execution
70%
Confidence
Test Examples:
• Domain entity business rules
• Value object validation
• Service method logic
• Extension method functionality
Test Suites
Organized by architecture layer
Domain Layer Tests
48 tests
Unit tests for business logic and domain entities
45 passed2 failed1 skipped
94% coverage
Application Service Tests
32 tests
Tests for application services and orchestration logic
30 passed1 failed1 skipped
87% coverage
API Integration Tests
24 tests
End-to-end tests for HTTP endpoints
22 passed2 skipped
76% coverage
Live Test Runner
Real-time test execution with detailed results
TDD Workflow
Red-Green-Refactor cycle demonstration
1
RED
Write failing test
2
GREEN
Make test pass
3
REFACTOR
Improve code
TDD Benefits
- • Design-driven development
- • High test coverage by design
- • Better code architecture
- • Reduced debugging time
- • Living documentation
Code Coverage Analysis
Interactive coverage hotspots and metrics
86%
Overall Coverage
4
Hotspots
Coverage Hotspots
high risk
67% coverage
Domain/Entities/User.cs:45
Complex email validation logic with multiple edge cases
Complexity: 8
high risk
73% coverage
Domain/Entities/Order.cs:123
Order total calculation with tax and discount logic
Complexity: 12
medium risk
82% coverage
Domain/Entities/Product.cs:89
Stock adjustment with concurrency checks
Complexity: 6
low risk
91% coverage
Application/Services/JwtTokenService.cs:67
JWT token generation and validation
Complexity: 4
Mocking Strategies
Test isolation and dependency management
Repository Mocking
Mock repository dependencies for isolated unit testing
Fast test executionIsolated testingDeterministic resultsNo database dependencies
Implementation Example
Performance Testing
Test execution metrics and optimization
2.3s
Avg Test Time
67ms
DB Round Trip
12GB
Memory Usage
99.7%
Success Rate
Optimization Tips
Use in-memory databases for integration tests
Parallel test execution for faster CI/CD
Mock external dependencies appropriately
Test data builders for maintainable setup
Categorize tests by execution speed
Testing Resources
Comprehensive testing guides, best practices, and advanced patterns available in the documentation.
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Testing Philosophy & TDD
advancedComprehensive testing strategies from unit to integration testing
30 min
advanced
First module
Last module