command-test-coverage

A Claude Code slash command for analyzing test coverage and generating missing tests.

Installation

# Clone to your preferred location
git clone git@github.com:claude-commands/command-test-coverage.git <clone-path>/command-test-coverage

# Symlink (use full path to cloned repo)
ln -s <clone-path>/command-test-coverage/test-coverage.md ~/.claude/commands/test-coverage.md

Usage

/test-coverage              # Full project coverage analysis
/test-coverage src/         # Coverage for specific directory
/test-coverage --generate   # Generate tests for uncovered code
/test-coverage --critical   # Focus on critical paths only

What it does

1. Detects test framework (Jest, Vitest, pytest, go test)
2. Runs coverage analysis
3. Identifies coverage gaps by criticality
4. Prioritizes what to test next
5. Optionally generates missing tests

Output Format

# Test Coverage Analysis

## Summary
| Metric | Value |
|--------|-------|
| Lines | 72.3% |
| Branches | 65.1% |
| Functions | 78.2% |

## Files Needing Attention
| File | Coverage | Priority |
|------|----------|----------|
| src/auth/login.ts | 32% | Critical |
| src/api/payments.ts | 41% | Critical |

## Recommendations
1. Add tests for auth error paths
2. Cover payment webhook handling

Framework Support

Framework	Coverage Tool	Notes
Jest	Built-in	Uses --coverage flag
Vitest	c8/istanbul	Uses --coverage flag
Go	go test	Uses -coverprofile
pytest	pytest-cov	Uses --cov flag
Rust	tarpaulin	Uses cargo tarpaulin

Requirements

• Git repository with tests
• Test framework installed
• Claude Code with Opus 4.5 model access

Updates

cd <clone-path>/command-test-coverage && git pull