windows-git-bash-testing

# Windows and Git Bash Testing Compatibility Guide

## Overview

This guide provides essential knowledge for running Vitest, Playwright, and MSW tests on Windows, particularly in Git Bash/MINGW environments. It addresses common path conversion issues, shell detection, and cross-platform test execution patterns.

## Shell Detection in Test Environments

### Detecting Git Bash/MINGW

When running tests in Git Bash or MINGW environments, use these detection methods:

**Method 1: Environment Variable (Most Reliable)**
```javascript
// Detect Git Bash/MINGW in Node.js test setup
function isGitBash() {
  return !!(process.env.MSYSTEM); // MINGW64, MINGW32, MSYS
}

function isWindows() {
  return process.platform === 'win32';
}

function needsPathConversion() {
  return isWindows() && isGitBash();
}
```

**Method 2: Using uname in Setup Scripts**
```bash
# In bash test setup scripts
case "$(uname -s)" in
  MINGW64*|MINGW32*|MSYS_NT*)
    # Git Bash/MINGW environment
    export TEST_ENV="mingw"
    ;;
  CYGWIN*)
    # Cygwin environment
    export TEST_ENV="cygwin"
    ;;
  Linux*)
    export TEST_ENV="linux"
    ;;
  Darwin*)
    export TEST_ENV="macos"
    ;;
esac
```

**Method 3: Combined Detection for Test Configuration**
```javascript
// vitest.config.js or test setup
import { execSync } from 'child_process';

function detectShell() {
  // Check MSYSTEM first (most reliable for Git Bash)
  if (process.env.MSYSTEM) {
    return { type: 'mingw', subsystem: process.env.MSYSTEM };
  }

  // Try uname if available
  try {
    const uname = execSync('uname -s', { encoding: 'utf8' }).trim();
    if (uname.startsWith('MINGW')) return { type: 'mingw' };
    if (uname.startsWith('CYGWIN')) return { type: 'cygwin' };
    if (uname === 'Darwin') return { type: 'macos' };
    if (uname === 'Linux') return { type: 'linux' };
  } catch {
    // uname not available (likely Windows cmd/PowerShell)
  }

  return { type: 'unknown', platform: process.platform };
}

const shell = detectShe