1#!/usr/bin/env bash
2# Bisection script to find which test creates unwanted files/state
3# Usage: ./find-polluter.sh <file_or_dir_to_check> <test_pattern>
4# Example: ./find-polluter.sh '.git' 'src/**/*.test.ts'
5 
6set -e
7 
8if [ $# -ne 2 ]; then
9  echo "Usage: $0 <file_to_check> <test_pattern>"
10  echo "Example: $0 '.git' 'src/**/*.test.ts'"
11  exit 1
12fi
13 
14POLLUTION_CHECK="$1"
15TEST_PATTERN="$2"
16 
17echo "🔍 Searching for test that creates: $POLLUTION_CHECK"
18echo "Test pattern: $TEST_PATTERN"
19echo ""
20 
21# Get list of test files
22TEST_FILES=$(find . -path "$TEST_PATTERN" | sort)
23TOTAL=$(echo "$TEST_FILES" | wc -l | tr -d ' ')
24 
25echo "Found $TOTAL test files"
26echo ""
27 
28COUNT=0
29for TEST_FILE in $TEST_FILES; do
30  COUNT=$((COUNT + 1))
31 
32  # Skip if pollution already exists
33  if [ -e "$POLLUTION_CHECK" ]; then
34    echo "⚠️  Pollution already exists before test $COUNT/$TOTAL"
35    echo "   Skipping: $TEST_FILE"
36    continue
37  fi
38 
39  echo "[$COUNT/$TOTAL] Testing: $TEST_FILE"
40 
41  # Run the test
42  npm test "$TEST_FILE" > /dev/null 2>&1 || true
43 
44  # Check if pollution appeared
45  if [ -e "$POLLUTION_CHECK" ]; then
46    echo ""
47    echo "🎯 FOUND POLLUTER!"
48    echo "   Test: $TEST_FILE"
49    echo "   Created: $POLLUTION_CHECK"
50    echo ""
51    echo "Pollution details:"
52    ls -la "$POLLUTION_CHECK"
53    echo ""
54    echo "To investigate:"
55    echo "  npm test $TEST_FILE    # Run just this test"
56    echo "  cat $TEST_FILE         # Review test code"
57    exit 1
58  fi
59done
60 
61echo ""
62echo "✅ No polluter found - all tests clean!"
63exit 0
64