Agent skill
quality-coverage-report
Generate test coverage reports showing which code paths are tested. Use to identify untested code and improve test coverage.
Stars
163
Forks
31
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/development/quality-coverage-report
SKILL.md
Test Coverage Report Skill
Generate and analyze test coverage reports.
When to Use
- After running tests
- Before creating PR
- Identifying untested code
- Improving test coverage
Quick Reference
bash
# Python coverage
pytest --cov=src --cov-report=html tests/
# View report
open htmlcov/index.html
# Terminal report
pytest --cov=src --cov-report=term-missing tests/
Coverage Metrics
Line Coverage
Percentage of code lines executed by tests:
text
src/module.mojo
Lines: 45/50 (90%)
Missing: 12, 18, 23, 35, 41
Branch Coverage
Percentage of decision branches taken:
text
Branches: 8/10 (80%)
Missing branches: line 12->15, line 18->20
Coverage Goals
| Category | Minimum | Target | Critical |
|---|---|---|---|
| Line coverage | 80% | 90% | 100% |
| Branch coverage | 70% | 85% | 95% |
| Critical paths | - | - | 100% |
Coverage Report
text
Coverage Report
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
File Lines Missing Coverage
────────────────────────────────────────────────
src/tensor.mojo 150 5 96.7%
src/nn.mojo 200 30 85.0%
src/utils.mojo 50 10 80.0%
────────────────────────────────────────────────
TOTAL 400 45 88.8%
Minimum coverage: 80% ✅
Target coverage: 90% ❌
Critical paths: 100% ✅
Improving Coverage
- Identify gaps - Find uncovered lines in report
- Write tests - Add tests for untested code
- Re-run - Generate new report
- Verify - Check coverage improved
- Repeat - Until targets met
Coverage Workflow
bash
# 1. Run tests with coverage
pytest --cov=src --cov-report=html --cov-report=term-missing tests/
# 2. Identify missing coverage
# Review "Missing" column in output
# 3. Write tests for gaps
# ... create test files ...
# 4. Re-run
pytest --cov=src --cov-report=html tests/
# 5. Check improvement
# Compare htmlcov/index.html
CI Integration
yaml
- name: Test Coverage
run: |
pytest --cov=src --cov-report=xml
codecov -f coverage.xml
Error Handling
| Error | Fix |
|---|---|
| "No module named pytest" | Install: pip install pytest-cov |
| "Cannot find tests/" | Verify test directory exists |
| No coverage report | Ensure tests ran successfully |
References
- Related skill:
phase-test-tddfor test generation - Related skill:
quality-run-lintersfor complete quality check - Pytest docs: https://docs.pytest.org/en/stable/
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