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.opencode/skills/ck-debug/scripts/find-polluter.test.md

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+# find-polluter.sh Test Documentation
+
+## Purpose
+Bisection script to find which test creates unwanted files or state pollution.
+
+## Manual Test Procedure
+
+### Setup Test Scenario
+```bash
+# Create test directory
+mkdir -p /tmp/polluter-test && cd /tmp/polluter-test
+
+# Create clean test
+cat > test1.test.js << 'EOF'
+console.log('Test 1: clean');
+EOF
+
+# Create polluter test
+cat > test2.test.js << 'EOF'
+const fs = require('fs');
+fs.mkdirSync('.git', { recursive: true });
+console.log('Test 2: creates pollution');
+EOF
+
+# Create another clean test
+cat > test3.test.js << 'EOF'
+console.log('Test 3: clean');
+EOF
+```
+
+### Run Script
+```bash
+# For projects with npm test
+/path/to/find-polluter.sh '.git' 'src/**/*.test.ts'
+
+# For node-only tests (modify script to use 'node' instead of 'npm test')
+./find-polluter.sh '.git' '*.test.js'
+```
+
+### Expected Output
+```
+🔍 Searching for test that creates: .git
+Test pattern: *.test.js
+
+Found 3 test files
+
+[1/3] Testing: ./test1.test.js
+[2/3] Testing: ./test2.test.js
+
+🎯 FOUND POLLUTER!
+   Test: ./test2.test.js
+   Created: .git
+```
+
+### Cleanup
+```bash
+rm -rf /tmp/polluter-test
+```
+
+## Test Results
+
+✅ Script logic verified (2025-11-11)
+- Correctly iterates through test files
+- Detects pollution creation
+- Reports the polluting test file
+- Exits early when polluter found
+
+## Usage Notes
+
+**Prerequisites:**
+- Test runner (npm test) must be configured in project
+- Test pattern must match actual test files
+- Pollution path must be accurate
+
+**Customization:**
+If your project doesn't use `npm test`, modify line 42:
+```bash
+# Replace
+npm test "$TEST_FILE" > /dev/null 2>&1 || true
+
+# With your test command
+node "$TEST_FILE" > /dev/null 2>&1 || true
+# Or
+jest "$TEST_FILE" > /dev/null 2>&1 || true
+```
+
+## Common Use Cases
+
+1. **Find test creating .git directory:**
+   ```bash
+   ./find-polluter.sh '.git' 'src/**/*.test.ts'
+   ```
+
+2. **Find test creating node_modules:**
+   ```bash
+   ./find-polluter.sh 'node_modules' 'test/**/*.spec.js'
+   ```
+
+3. **Find test creating specific file:**
+   ```bash
+   ./find-polluter.sh 'unwanted-file.txt' '**/*.test.js'
+   ```