AgentSkillsCN

calculate-coverage

测量测试覆盖率，识别尚未被测试的代码，助力全面评估测试的完备性。

SKILL.md
--- frontmatter
name: calculate-coverage
description: "Measure test coverage and identify untested code. Use when assessing test completeness."
mcp_fallback: none
category: analysis
tier: 2

Calculate Coverage

Measure code coverage percentage and identify which code paths are untested to ensure comprehensive testing.

When to Use

  • •Checking test coverage for modules
  • •Identifying gaps in test suites
  • •Meeting coverage thresholds (typically 80%+)
  • •Planning additional test cases

Quick Reference

bash
# Python coverage with pytest
pip install coverage pytest-cov
pytest --cov=module_name --cov-report=html tests/

# View coverage report
open htmlcov/index.html

# Check coverage threshold
coverage report --fail-under=80

Workflow

  1. •Install coverage tool: Set up measurement infrastructure
  2. •Run tests with coverage: Execute test suite capturing coverage data
  3. •Generate report: Create HTML or text coverage report
  4. •Analyze gaps: Identify untested functions, branches, edge cases
  5. •Plan improvements: Create tests for uncovered code paths

Output Format

Coverage analysis:

  • •Overall coverage percentage
  • •Per-module coverage breakdown
  • •Uncovered lines (with line numbers)
  • •Branch coverage (if applicable)
  • •Recommendations for improvement

References

  • •See run-tests skill for test execution
  • •See generate-tests skill for test creation
  • •See CLAUDE.md > Key Development Principles (TDD) for testing strategy