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67 lines
1.7 KiB
Markdown
67 lines
1.7 KiB
Markdown
---
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description: Enforce TDD workflow with 80%+ coverage
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agent: tdd-guide
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subtask: true
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---
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# TDD Command
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Implement the following using strict test-driven development: $ARGUMENTS
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## TDD Cycle (MANDATORY)
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```
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RED → GREEN → REFACTOR → REPEAT
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```
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1. **RED**: Write a failing test FIRST
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2. **GREEN**: Write minimal code to pass the test
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3. **REFACTOR**: Improve code while keeping tests green
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4. **REPEAT**: Continue until feature complete
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## Your Task
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### Step 1: Define Interfaces (SCAFFOLD)
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- Define TypeScript interfaces for inputs/outputs
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- Create function signature with `throw new Error('Not implemented')`
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### Step 2: Write Failing Tests (RED)
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- Write tests that exercise the interface
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- Include happy path, edge cases, and error conditions
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- Run tests - verify they FAIL
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### Step 3: Implement Minimal Code (GREEN)
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- Write just enough code to make tests pass
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- No premature optimization
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- Run tests - verify they PASS
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### Step 4: Refactor (IMPROVE)
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- Extract constants, improve naming
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- Remove duplication
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- Run tests - verify they still PASS
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### Step 5: Check Coverage
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- Target: 80% minimum
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- 100% for critical business logic
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- Add more tests if needed
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## Coverage Requirements
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| Code Type | Minimum |
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|-----------|---------|
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| Standard code | 80% |
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| Financial calculations | 100% |
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| Authentication logic | 100% |
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| Security-critical code | 100% |
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## Test Types to Include
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- **Unit Tests**: Individual functions
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- **Edge Cases**: Empty, null, max values, boundaries
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- **Error Conditions**: Invalid inputs, network failures
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- **Integration Tests**: API endpoints, database operations
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---
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**MANDATORY**: Tests must be written BEFORE implementation. Never skip the RED phase.
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