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733295b44e
Commands enhanced with multi-language support, error recovery strategies, and structured step-by-step workflows: - build-fix: build system detection table, fix loop, recovery strategies - test-coverage: framework detection, test generation rules, before/after report - refactor-clean: safety tiers (SAFE/CAUTION/DANGER), multi-language tools - update-codemaps: codemap format spec, diff detection, metadata headers - update-docs: source-of-truth mapping, staleness checks, generated markers New example: - rust-api-CLAUDE.md: Axum + SQLx + PostgreSQL with layered architecture, thiserror patterns, compile-time SQL verification, integration test examples
2.6 KiB
2.6 KiB
Test Coverage
Analyze test coverage, identify gaps, and generate missing tests to reach 80%+ coverage.
Step 1: Detect Test Framework
| Indicator | Coverage Command |
|---|---|
jest.config.* or package.json jest |
npx jest --coverage --coverageReporters=json-summary |
vitest.config.* |
npx vitest run --coverage |
pytest.ini / pyproject.toml pytest |
pytest --cov=src --cov-report=json |
Cargo.toml |
cargo llvm-cov --json |
pom.xml with JaCoCo |
mvn test jacoco:report |
go.mod |
go test -coverprofile=coverage.out ./... |
Step 2: Analyze Coverage Report
- Run the coverage command
- Parse the output (JSON summary or terminal output)
- List files below 80% coverage, sorted worst-first
- For each under-covered file, identify:
- Untested functions or methods
- Missing branch coverage (if/else, switch, error paths)
- Dead code that inflates the denominator
Step 3: Generate Missing Tests
For each under-covered file, generate tests following this priority:
- Happy path — Core functionality with valid inputs
- Error handling — Invalid inputs, missing data, network failures
- Edge cases — Empty arrays, null/undefined, boundary values (0, -1, MAX_INT)
- Branch coverage — Each if/else, switch case, ternary
Test Generation Rules
- Place tests adjacent to source:
foo.ts→foo.test.ts(or project convention) - Use existing test patterns from the project (import style, assertion library, mocking approach)
- Mock external dependencies (database, APIs, file system)
- Each test should be independent — no shared mutable state between tests
- Name tests descriptively:
test_create_user_with_duplicate_email_returns_409
Step 4: Verify
- Run the full test suite — all tests must pass
- Re-run coverage — verify improvement
- If still below 80%, repeat Step 3 for remaining gaps
Step 5: Report
Show before/after comparison:
Coverage Report
──────────────────────────────
File Before After
src/services/auth.ts 45% 88%
src/utils/validation.ts 32% 82%
──────────────────────────────
Overall: 67% 84% ✅
Focus Areas
- Functions with complex branching (high cyclomatic complexity)
- Error handlers and catch blocks
- Utility functions used across the codebase
- API endpoint handlers (request → response flow)
- Edge cases: null, undefined, empty string, empty array, zero, negative numbers