1  #!/bin/bash
 2  # run-affected-tests.sh — Run only tests affected by changed source files.
 3  #
 4  # Usage:
 5  #   ./scripts/run-affected-tests.sh                   # Tests for uncommitted changes
 6  #   ./scripts/run-affected-tests.sh HEAD~3             # Tests for last 3 commits
 7  #   ./scripts/run-affected-tests.sh src/utils/foo.js   # Tests for a specific file
 8  #
 9  # Mapping: src/X/Y.js → tests/X/Y*.test.js (glob catches .test.js, .integration.test.js, etc.)
10  # Skips c8 coverage (coverage only matters on full suite).
11  # Exit 0 if no matching tests found (not every file has tests).
12  
13  set -euo pipefail
14  cd "$(dirname "$0")/.."
15  
16  # Determine which source files changed
17  if [ $# -eq 0 ]; then
18    # Uncommitted changes (staged + unstaged)
19    changed=$(git diff --name-only HEAD 2>/dev/null || git diff --name-only)
20  elif [ -f "$1" ]; then
21    # Explicit file path(s)
22    changed="$*"
23  else
24    # Git ref (e.g., HEAD~3, main..HEAD)
25    changed=$(git diff --name-only "$1")
26  fi
27  
28  # Filter to src/ JS files only, skip agents/ (being replaced)
29  src_files=$(echo "$changed" | grep '^src/' | grep '\.js$' | grep -v '^src/agents/' || true)
30  
31  if [ -z "$src_files" ]; then
32    echo "No src/ JS files changed (excluding src/agents/). Nothing to test."
33    exit 0
34  fi
35  
36  # Map source files to test files
37  test_files=""
38  while IFS= read -r src_file; do
39    # src/utils/rate-limiter.js → tests/utils/rate-limiter
40    base="${src_file#src/}"        # utils/rate-limiter.js
41    base="${base%.js}"             # utils/rate-limiter
42    # Glob for all test variants
43    matches=$(find tests/ -path "tests/${base}*.test.js" 2>/dev/null || true)
44    if [ -n "$matches" ]; then
45      test_files="$test_files $matches"
46    fi
47  done <<< "$src_files"
48  
49  # Deduplicate and trim
50  test_files=$(echo "$test_files" | tr ' ' '\n' | sort -u | grep -v '^$' || true)
51  
52  if [ -z "$test_files" ]; then
53    echo "Changed src files:"
54    echo "$src_files" | sed 's/^/  /'
55    echo "No matching test files found. Skipping."
56    exit 0
57  fi
58  
59  count=$(echo "$test_files" | wc -l)
60  echo "Running $count affected test file(s):"
61  echo "$test_files" | sed 's/^/  /'
62  echo ""
63  
64  # Run without c8 coverage (coverage only matters on full suite)
65  # shellcheck disable=SC2086
66  NODE_ENV=test LOGS_DIR=/tmp/test-logs DATABASE_PATH=/tmp/test-sites.db \
67    node --experimental-test-module-mocks --test $test_files