test: assert 3rd party reexports (google#987)

closes google#979

Author: c1825846

scripts/generate-vendor-tests.mjs

@@ -0,0 +1,89 @@
+#!/usr/bin/env node
+
+// Copyright 2024 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import fs from 'node:fs'
+import path from 'node:path'
+import process from 'node:process'
+
+import { YAML, fs as vendorFs } from '../build/vendor.js'
+
+const copyright = `// Copyright 2024 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.`
+
+const testLibImports = `import assert from 'node:assert'
+import { test, describe } from 'node:test'`
+
+const newLine = '\n'
+
+const vendors = [
+  {
+    name: 'YAML',
+    module: YAML,
+  },
+  {
+    name: 'fs',
+    module: vendorFs,
+  },
+]
+
+const cwd = process.cwd()
+
+vendors.forEach(({ name, module }) => {
+  const outputFile = path.resolve(
+    cwd,
+    `test/vendor-${name.toLowerCase()}.test.js`
+  )
+
+  const moduleImport = `import { ${name} } from '../build/vendor.js'`
+
+  const fileText = [
+    copyright,
+    newLine,
+    testLibImports,
+    moduleImport,
+    newLine,
+    createDescribeBlock(
+      name,
+      createTestBlock(
+        'has proper exports',
+        Object.entries(module)
+          .map(([k, v]) => `assert.equal(typeof ${name}.${k}, '${typeof v}')`)
+          .join('\n')
+      )
+    ),
+  ].join('\n')
+
+  fs.writeFileSync(outputFile, fileText)
+})
+
+function createDescribeBlock(vendorName, content) {
+  return [`describe('vendor ${vendorName}', () => {`, content, '})'].join('\n')
+}
+
+function createTestBlock(label, content) {
+  return [`test('${label}', () => {`, content, '})'].join('\n')
+}