참고소스 수정본

참고/playwright-main/tests/config/queryObjects.ts

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+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * 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
+ *
+ * http://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.
+ */
+
+export async function queryObjectCount(type: Function): Promise<number> {
+  globalThis.typeForQueryObjects = type;
+  const session: import('inspector').Session = new (require('node:inspector').Session)();
+  session.connect();
+  try {
+    await new Promise(f => session.post('Runtime.enable', f));
+    const { result: constructorFunction } = await new Promise(f => session.post('Runtime.evaluate', {
+      expression: `globalThis.typeForQueryObjects.prototype`,
+      includeCommandLineAPI: true,
+    }, (_, result) => f(result))) as any;
+
+    const { objects: instanceArray } = await new Promise(f => session.post('Runtime.queryObjects', {
+      prototypeObjectId: constructorFunction.objectId
+    }, (_, result) => f(result))) as any;
+
+    const { result: { value } } = await new Promise<any>(f => session.post('Runtime.callFunctionOn', {
+      functionDeclaration: 'function (arr) { return this.length; }',
+      objectId: instanceArray.objectId,
+      arguments: [{ objectId: instanceArray.objectId }],
+    }, (_, result) => f(result as any)));
+
+    return value;
+  } finally {
+    session.disconnect();
+  }
+}