A modern, TypeScript-based GitHub Action that compares code coverage reports between branches and provides detailed feedback in pull requests.

Success Screenshot

Failure Screenshot

• Compare code coverage between base and current branches
• Detect decreased coverage in changed files
• Require 100% coverage for newly added files
• Support for Jest and Cobertura coverage reports
• Detailed GitHub PR comments with coverage changes
• Configurable thresholds and options

- name: Coverage Report
  uses: adRise/jest-cov-reporter@main
  with:
    branch-coverage-report-path: ./coverage/coverage-summary.json
    base-coverage-report-path: ./coverage/master-coverage-summary.json
    delta: 0.3
    accessToken: ${{ secrets.GITHUB_TOKEN }}
    fullCoverageDiff: true
    useSameComment: true

The check-new-file-full-coverage option enforces that all newly added files have 100% test coverage. This encourages developers to write comprehensive tests for new code.

You can add a label to your PR called skip-new-file-full-coverage to bypass this check for specific PRs.

• Node.js (v16+)
• npm or yarn

# Install dependencies
npm install

# Run tests
npm test

# Build the project
npm run build

/src
  /core            # Core functionality
    /diff          # Coverage diff calculation
    /threshold     # Coverage threshold validation
    /format        # Report formatting
  /parsers         # Coverage report parsers
  /utils           # Utility functions
  /types           # TypeScript types

Contributions are welcome! Please feel free to submit a Pull Request.

MIT