test(BASE-04): freeze published DOM input and demo baselines

refactor/scripts/demos.test.mjs

@@ -0,0 +1,21 @@
+import assert from 'node:assert/strict'
+import fs from 'node:fs'
+import path from 'node:path'
+import test from 'node:test'
+import { validateDemoInventory } from './demos.mjs'
+import { refactorDir } from './releases.mjs'
+
+test('Demo inventory rejects missing files, routes and ecosystem packages', () => {
+  const inventory = JSON.parse(fs.readFileSync(path.join(refactorDir, 'baselines/demo-inventory.json'), 'utf8'))
+  validateDemoInventory(inventory)
+  for (const mutate of [
+    value => value.examples.pop(),
+    value => value.pages.pop(),
+    value => value.examples.find(item => item.menuLinks.length).menuLinks.pop(),
+    value => value.packages.pop(),
+  ]) {
+    const changed = structuredClone(inventory)
+    mutate(changed)
+    assert.throws(() => validateDemoInventory(changed))
+  }
+})