chore(vscode): add vscode mcp factory (#868)

tests/vscode.spec.ts

@@ -0,0 +1,54 @@
+/**
+ * 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.
+ */
+
+import { test, expect } from './fixtures.js';
+
+test('browser_connect(vscode) works', async ({ startClient, playwright, browserName }) => {
+  const { client } = await startClient({
+    args: ['--vscode'],
+  });
+
+  const server = await playwright[browserName].launchServer();
+
+  expect(await client.callTool({
+    name: 'browser_connect',
+    arguments: {
+      connectionString: server.wsEndpoint(),
+      lib: import.meta.resolve('playwright'),
+    }
+  })).toHaveResponse({
+    result: 'Successfully connected.'
+  });
+
+  expect(await client.callTool({
+    name: 'browser_navigate',
+    arguments: {
+      url: 'data:text/html,foo'
+    }
+  })).toHaveResponse({
+    pageState: expect.stringContaining('foo'),
+  });
+
+  await server.close();
+
+  expect(await client.callTool({
+    name: 'browser_snapshot',
+    arguments: {}
+  }), 'it actually used the server').toHaveResponse({
+    isError: true,
+    result: expect.stringContaining('ECONNREFUSED')
+  });
+});