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skills/tdd-automation/templates/pre-commit.sh

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+#!/bin/bash
+
+###############################################################################
+# TDD_AUTOMATION: Git Pre-Commit Hook
+#
+# Validates that tests exist for implementation files before allowing commit.
+# Ensures TDD workflow (test-first) is followed.
+#
+# Installed by: tdd-automation skill
+###############################################################################
+
+echo "🔍 TDD Validation: Checking test-first compliance..."
+
+# Get list of new implementation files being committed
+IMPL_FILES=$(git diff --cached --name-only --diff-filter=A | grep -E "^src/.*\.(ts|js|tsx|jsx)$" | grep -v ".test." | grep -v ".spec.")
+
+if [ -z "$IMPL_FILES" ]; then
+  echo "✅ No new implementation files detected"
+  exit 0
+fi
+
+VIOLATIONS=0
+
+# Check each implementation file
+while IFS= read -r impl_file; do
+  if [ -z "$impl_file" ]; then
+    continue
+  fi
+
+  # Determine expected test file name
+  dir=$(dirname "$impl_file")
+  filename=$(basename "$impl_file")
+  base="${filename%.*}"
+  ext="${filename##*.}"
+
+  # Try multiple test file patterns
+  test_patterns=(
+    "$dir/$base.test.$ext"
+    "$dir/$base.spec.$ext"
+    "${impl_file%.*}.test.$ext"
+    "${impl_file%.*}.spec.$ext"
+  )
+
+  test_exists=false
+  for test_file in "${test_patterns[@]}"; do
+    if [ -f "$test_file" ]; then
+      test_exists=true
+
+      # Check if test file was committed first (git log timestamps)
+      test_commit_time=$(git log --diff-filter=A --format="%at" --follow -- "$test_file" 2>/dev/null | head -1)
+      impl_commit_time=$(date +%s)  # Current time for uncommitted file
+
+      # If test file exists in git history, it was committed first - good!
+      if [ -n "$test_commit_time" ]; then
+        echo "✅ $impl_file -> Test exists: $test_file"
+        break
+      else
+        # Test file exists but not committed yet
+        if git diff --cached --name-only | grep -q "$test_file"; then
+          echo "✅ $impl_file -> Test being committed: $test_file"
+          break
+        fi
+      fi
+    fi
+  done
+
+  if [ "$test_exists" = false ]; then
+    echo "❌ TDD VIOLATION: No test file found for $impl_file"
+    echo "   Expected one of:"
+    for pattern in "${test_patterns[@]}"; do
+      echo "     - $pattern"
+    done
+    VIOLATIONS=$((VIOLATIONS + 1))
+  fi
+done <<< "$IMPL_FILES"
+
+# Check for test files in commit
+TEST_FILES=$(git diff --cached --name-only | grep -E "\.(test|spec)\.(ts|js|tsx|jsx)$")
+
+if [ -n "$TEST_FILES" ]; then
+  echo ""
+  echo "📝 Test files in this commit:"
+  echo "$TEST_FILES" | while IFS= read -r test_file; do
+    echo "   ✓ $test_file"
+  done
+fi
+
+echo ""
+
+if [ $VIOLATIONS -gt 0 ]; then
+  echo "❌ TDD Validation Failed: $VIOLATIONS violation(s) found"
+  echo ""
+  echo "TDD requires writing tests BEFORE implementation."
+  echo ""
+  echo "To fix:"
+  echo "  1. Create test file(s) for the implementation"
+  echo "  2. Commit tests first: git add <test-files> && git commit -m 'Add tests for [feature]'"
+  echo "  3. Then commit implementation: git add <impl-files> && git commit -m 'Implement [feature]'"
+  echo ""
+  echo "Or use: npm run generate:test <impl-file> to create a test template"
+  echo ""
+  echo "To bypass this check (not recommended):"
+  echo "  git commit --no-verify"
+  echo ""
+  exit 1
+fi
+
+echo "✅ TDD Validation Passed: All implementation files have tests"
+echo ""
+exit 0