CI for checking generated suites in sync with templates

.github/workflows/check-generated-tests-in-sync.yml

@@ -0,0 +1,35 @@
+name: Check Generated Tests In Sync
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize, ready_for_review]
+    paths:
+      - "test_generator/**"
+      - "test_templates/**"
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  check_generated_tests:
+    name: Check generated tests in sync
+    runs-on: ubuntu-24.04
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
+        with:
+          submodules: true
+
+      - name: Setup Node
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e
+        with:
+          node-version: 24.x
+          cache: "npm"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Check generated tests in sync
+        run: bin/check-generated-tests-in-sync

bin/check-generated-tests-in-sync

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+#!/usr/bin/env bash
+
+# Synopsis:
+# Check that test suites are in sync with their current templates.
+
+set -euo pipefail
+
+npm run res:build
+make generate-tests
+
+if [[ -n "$(git status --porcelain -- exercises/practice)" ]]; then
+  echo "::error:: Generated test template output does not match committed test output."
+  git status --short -- exercises/practice
+  git diff -- exercises/practice
+  exit 1
+fi
+
+echo "Generated test template output matches committed test output."