tdd-workflows-tdd-cycle
Tests & Qualité"Use when working with tdd workflows tdd cycle"
Documentation
Use this skill when
●Working on tdd workflows tdd cycle tasks or workflows
●Needing guidance, best practices, or checklists for tdd workflows tdd cycle
Do not use this skill when
●The task is unrelated to tdd workflows tdd cycle
●You need a different domain or tool outside this scope
Instructions
●Clarify goals, constraints, and required inputs.
●Apply relevant best practices and validate outcomes.
●Provide actionable steps and verification.
●If detailed examples are required, open
resources/implementation-playbook.md.Execute a comprehensive Test-Driven Development (TDD) workflow with strict red-green-refactor discipline:
[Extended thinking: This workflow enforces test-first development through coordinated agent orchestration. Each phase of the TDD cycle is strictly enforced with fail-first verification, incremental implementation, and continuous refactoring. The workflow supports both single test and test suite approaches with configurable coverage thresholds.]
Configuration
Coverage Thresholds
●Minimum line coverage: 80%
●Minimum branch coverage: 75%
●Critical path coverage: 100%
Refactoring Triggers
●Cyclomatic complexity > 10
●Method length > 20 lines
●Class length > 200 lines
●Duplicate code blocks > 3 lines
Phase 1: Test Specification and Design
1. Requirements Analysis
●Use Task tool with subagent_type="comprehensive-review::architect-review"
●Prompt: "Analyze requirements for: $ARGUMENTS. Define acceptance criteria, identify edge cases, and create test scenarios. Output a comprehensive test specification."
●Output: Test specification, acceptance criteria, edge case matrix
●Validation: Ensure all requirements have corresponding test scenarios
2. Test Architecture Design
●Use Task tool with subagent_type="unit-testing::test-automator"
●Prompt: "Design test architecture for: $ARGUMENTS based on test specification. Define test structure, fixtures, mocks, and test data strategy. Ensure testability and maintainability."
●Output: Test architecture, fixture design, mock strategy
●Validation: Architecture supports isolated, fast, reliable tests
Phase 2: RED - Write Failing Tests
3. Write Unit Tests (Failing)
●Use Task tool with subagent_type="unit-testing::test-automator"
●Prompt: "Write FAILING unit tests for: $ARGUMENTS. Tests must fail initially. Include edge cases, error scenarios, and happy paths. DO NOT implement production code."
●Output: Failing unit tests, test documentation
●CRITICAL: Verify all tests fail with expected error messages
4. Verify Test Failure
●Use Task tool with subagent_type="tdd-workflows::code-reviewer"
●Prompt: "Verify that all tests for: $ARGUMENTS are failing correctly. Ensure failures are for the right reasons (missing implementation, not test errors). Confirm no false positives."
●Output: Test failure verification report
●GATE: Do not proceed until all tests fail appropriately
Phase 3: GREEN - Make Tests Pass
5. Minimal Implementation
●Use Task tool with subagent_type="backend-development::backend-architect"
●Prompt: "Implement MINIMAL code to make tests pass for: $ARGUMENTS. Focus only on making tests green. Do not add extra features or optimizations. Keep it simple."
●Output: Minimal working implementation
●Constraint: No code beyond what's needed to pass tests
6. Verify Test Success
●Use Task tool with subagent_type="unit-testing::test-automator"
●Prompt: "Run all tests for: $ARGUMENTS and verify they pass. Check test coverage metrics. Ensure no tests were accidentally broken."
●Output: Test execution report, coverage metrics
●GATE: All tests must pass before proceeding
Phase 4: REFACTOR - Improve Code Quality
7. Code Refactoring
●Use Task tool with subagent_type="tdd-workflows::code-reviewer"
●Prompt: "Refactor implementation for: $ARGUMENTS while keeping tests green. Apply SOLID principles, remove duplication, improve naming, and optimize performance. Run tests after each refactoring."
●Output: Refactored code, refactoring report
●Constraint: Tests must remain green throughout
8. Test Refactoring
●Use Task tool with subagent_type="unit-testing::test-automator"
●Prompt: "Refactor tests for: $ARGUMENTS. Remove test duplication, improve test names, extract common fixtures, and enhance test readability. Ensure tests still provide same coverage."
●Output: Refactored tests, improved test structure
●Validation: Coverage metrics unchanged or improved
Phase 5: Integration and System Tests
9. Write Integration Tests (Failing First)
●Use Task tool with subagent_type="unit-testing::test-automator"
●Prompt: "Write FAILING integration tests for: $ARGUMENTS. Test component interactions, API contracts, and data flow. Tests must fail initially."
●Output: Failing integration tests
●Validation: Tests fail due to missing integration logic
10. Implement Integration
●Use Task tool with subagent_type="backend-development::backend-architect"
●Prompt: "Implement integration code for: $ARGUMENTS to make integration tests pass. Focus on component interaction and data flow."
●Output: Integration implementation
●Validation: All integration tests pass
Phase 6: Continuous Improvement Cycle
11. Performance and Edge Case Tests
●Use Task tool with subagent_type="unit-testing::test-automator"
●Prompt: "Add performance tests and additional edge case tests for: $ARGUMENTS. Include stress tests, boundary tests, and error recovery tests."
●Output: Extended test suite
●Metric: Increased test coverage and scenario coverage
12. Final Code Review
●Use Task tool with subagent_type="comprehensive-review::architect-review"
●Prompt: "Perform comprehensive review of: $ARGUMENTS. Verify TDD process was followed, check code quality, test quality, and coverage. Suggest improvements."
●Output: Review report, improvement suggestions
●Action: Implement critical suggestions while maintaining green tests
Incremental Development Mode
For test-by-test development:
1.Write ONE failing test
2.Make ONLY that test pass
3.Refactor if needed
4.Repeat for next test
Use this approach by adding --incremental flag to focus on one test at a time.
Test Suite Mode
For comprehensive test suite development:
1.Write ALL tests for a feature/module (failing)
2.Implement code to pass ALL tests
3.Refactor entire module
4.Add integration tests
Use this approach by adding --suite flag for batch test development.
Validation Checkpoints
RED Phase Validation
●[ ] All tests written before implementation
●[ ] All tests fail with meaningful error messages
●[ ] Test failures are due to missing implementation
●[ ] No test passes accidentally
GREEN Phase Validation
●[ ] All tests pass
●[ ] No extra code beyond test requirements
●[ ] Coverage meets minimum thresholds
●[ ] No test was modified to make it pass
REFACTOR Phase Validation
●[ ] All tests still pass after refactoring
●[ ] Code complexity reduced
●[ ] Duplication eliminated
●[ ] Performance improved or maintained
●[ ] Test readability improved
Coverage Reports
Generate coverage reports after each phase:
●Line coverage
●Branch coverage
●Function coverage
●Statement coverage
Failure Recovery
If TDD discipline is broken:
1.STOP immediately
2.Identify which phase was violated
3.Rollback to last valid state
4.Resume from correct phase
5.Document lesson learned
TDD Metrics Tracking
Track and report:
●Time in each phase (Red/Green/Refactor)
●Number of test-implementation cycles
●Coverage progression
●Refactoring frequency
●Defect escape rate
Anti-Patterns to Avoid
●Writing implementation before tests
●Writing tests that already pass
●Skipping the refactor phase
●Writing multiple features without tests
●Modifying tests to make them pass
●Ignoring failing tests
●Writing tests after implementation
Success Criteria
●100% of code written test-first
●All tests pass continuously
●Coverage exceeds thresholds
●Code complexity within limits
●Zero defects in covered code
●Clear test documentation
●Fast test execution (< 5 seconds for unit tests)
Notes
●Enforce strict RED-GREEN-REFACTOR discipline
●Each phase must be completed before moving to next
●Tests are the specification
●If a test is hard to write, the design needs improvement
●Refactoring is NOT optional
●Keep test execution fast
●Tests should be independent and isolated
TDD implementation for: $ARGUMENTS
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