mirror of
https://github.com/wshobson/agents.git
synced 2026-03-18 17:47:16 +00:00
141 lines
3.7 KiB
Markdown
141 lines
3.7 KiB
Markdown
Write comprehensive failing tests following TDD red phase principles.
|
|
|
|
[Extended thinking: Generates failing tests that properly define expected behavior using test-automator agent.]
|
|
|
|
## Role
|
|
|
|
Generate failing tests using Task tool with subagent_type="unit-testing::test-automator".
|
|
|
|
## Prompt Template
|
|
|
|
"Generate comprehensive FAILING tests for: $ARGUMENTS
|
|
|
|
## Core Requirements
|
|
|
|
1. **Test Structure**
|
|
- Framework-appropriate setup (Jest/pytest/JUnit/Go/RSpec)
|
|
- Arrange-Act-Assert pattern
|
|
- should_X_when_Y naming convention
|
|
- Isolated fixtures with no interdependencies
|
|
|
|
2. **Behavior Coverage**
|
|
- Happy path scenarios
|
|
- Edge cases (empty, null, boundary values)
|
|
- Error handling and exceptions
|
|
- Concurrent access (if applicable)
|
|
|
|
3. **Failure Verification**
|
|
- Tests MUST fail when run
|
|
- Failures for RIGHT reasons (not syntax/import errors)
|
|
- Meaningful diagnostic error messages
|
|
- No cascading failures
|
|
|
|
4. **Test Categories**
|
|
- Unit: Isolated component behavior
|
|
- Integration: Component interaction
|
|
- Contract: API/interface contracts
|
|
- Property: Mathematical invariants
|
|
|
|
## Framework Patterns
|
|
|
|
**JavaScript/TypeScript (Jest/Vitest)**
|
|
|
|
- Mock dependencies with `vi.fn()` or `jest.fn()`
|
|
- Use `@testing-library` for React components
|
|
- Property tests with `fast-check`
|
|
|
|
**Python (pytest)**
|
|
|
|
- Fixtures with appropriate scopes
|
|
- Parametrize for multiple test cases
|
|
- Hypothesis for property-based tests
|
|
|
|
**Go**
|
|
|
|
- Table-driven tests with subtests
|
|
- `t.Parallel()` for parallel execution
|
|
- Use `testify/assert` for cleaner assertions
|
|
|
|
**Ruby (RSpec)**
|
|
|
|
- `let` for lazy loading, `let!` for eager
|
|
- Contexts for different scenarios
|
|
- Shared examples for common behavior
|
|
|
|
## Quality Checklist
|
|
|
|
- Readable test names documenting intent
|
|
- One behavior per test
|
|
- No implementation leakage
|
|
- Meaningful test data (not 'foo'/'bar')
|
|
- Tests serve as living documentation
|
|
|
|
## Anti-Patterns to Avoid
|
|
|
|
- Tests passing immediately
|
|
- Testing implementation vs behavior
|
|
- Complex setup code
|
|
- Multiple responsibilities per test
|
|
- Brittle tests tied to specifics
|
|
|
|
## Edge Case Categories
|
|
|
|
- **Null/Empty**: undefined, null, empty string/array/object
|
|
- **Boundaries**: min/max values, single element, capacity limits
|
|
- **Special Cases**: Unicode, whitespace, special characters
|
|
- **State**: Invalid transitions, concurrent modifications
|
|
- **Errors**: Network failures, timeouts, permissions
|
|
|
|
## Output Requirements
|
|
|
|
- Complete test files with imports
|
|
- Documentation of test purpose
|
|
- Commands to run and verify failures
|
|
- Metrics: test count, coverage areas
|
|
- Next steps for green phase"
|
|
|
|
## Validation
|
|
|
|
After generation:
|
|
|
|
1. Run tests - confirm they fail
|
|
2. Verify helpful failure messages
|
|
3. Check test independence
|
|
4. Ensure comprehensive coverage
|
|
|
|
## Example (Minimal)
|
|
|
|
```typescript
|
|
// auth.service.test.ts
|
|
describe("AuthService", () => {
|
|
let authService: AuthService;
|
|
let mockUserRepo: jest.Mocked<UserRepository>;
|
|
|
|
beforeEach(() => {
|
|
mockUserRepo = { findByEmail: jest.fn() } as any;
|
|
authService = new AuthService(mockUserRepo);
|
|
});
|
|
|
|
it("should_return_token_when_valid_credentials", async () => {
|
|
const user = { id: "1", email: "test@example.com", passwordHash: "hashed" };
|
|
mockUserRepo.findByEmail.mockResolvedValue(user);
|
|
|
|
const result = await authService.authenticate("test@example.com", "pass");
|
|
|
|
expect(result.success).toBe(true);
|
|
expect(result.token).toBeDefined();
|
|
});
|
|
|
|
it("should_fail_when_user_not_found", async () => {
|
|
mockUserRepo.findByEmail.mockResolvedValue(null);
|
|
|
|
const result = await authService.authenticate("none@example.com", "pass");
|
|
|
|
expect(result.success).toBe(false);
|
|
expect(result.error).toBe("INVALID_CREDENTIALS");
|
|
});
|
|
});
|
|
```
|
|
|
|
Test requirements: $ARGUMENTS
|