Go Coverage Tree

GoLand-style test coverage visualization for VS Code and Cursor IDE

Visualize your Go test coverage directly in the file explorer with percentage badges and color-coded indicators - just like in GoLand/IntelliJ IDEA.

✨ Features

📊 File Explorer Decorations

• Percentage badges on files and folders showing coverage
• Color-coded indicators:
  • 🟢 Green (80%+): High coverage
  • 🟡 Yellow (50-80%): Medium coverage
  • 🔴 Red (<50%): Low coverage

🌳 Coverage Tree View

• Dedicated sidebar panel showing coverage hierarchy
• Expandable directory structure
• Click to open files
• Aggregate coverage for directories

📝 Inline Editor Decorations

• Line-by-line coverage highlighting
• Green background for covered lines
• Red background for uncovered lines
• Hover for hit count information

📈 Status Bar

• Quick coverage overview
• Click to show detailed report
• Warning colors for low coverage

🎯 Coverage Report

• Beautiful HTML report in webview
• Sortable file list
• Visual coverage bars
• Summary statistics

🚀 Quick Start

1. Install the extension from VS Code Marketplace

2. Run tests with coverage:

   • Open Command Palette (Cmd+Shift+P / Ctrl+Shift+P)
   • Run Go Coverage: Run Tests with Coverage

   Or run manually:

   go test -coverprofile=coverage.out ./...
   

3. View coverage in file explorer and Coverage sidebar panel

📋 Commands

⚙️ Configuration

🎨 Custom Colors

You can customize colors in your settings.json:

{
  "workbench.colorCustomizations": {
    "goCoverage.highCoverage": "#00ff00",
    "goCoverage.mediumCoverage": "#ffff00",
    "goCoverage.lowCoverage": "#ff0000",
    "goCoverage.coveredBackground": "#00ff0020",
    "goCoverage.uncoveredBackground": "#ff000020"
  }
}

📁 Supported Formats

• Go Coverage (coverage.out) - Native Go test coverage format
• LCOV (coverage.lcov, *.lcov) - Standard LCOV format

🛠️ Development

# Clone repository
git clone https://github.com/kemal-savut/go-coverage-tree.git
cd go-coverage-tree

# Install dependencies
npm install

# Compile
npm run compile

# Watch mode
npm run watch

# Package extension
npm run package

Testing the Extension

1. Press F5 to open Extension Development Host
2. Open a Go project
3. Run go test -coverprofile=coverage.out ./...
4. See coverage decorations appear!

📄 License

MIT License - see LICENSE for details.

🤝 Contributing

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

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

📮 Feedback

• 🐛 Report bugs
• 💡 Request features
• ⭐ Star the repo if you find it useful!

Made with ❤️ for the Go community