# 🚀 Sync Gemini CLI v0.2.1 - Major Feature Update (#483)

integration-tests/test-mcp-server.ts

@@ -0,0 +1,64 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
+import { StreamableHTTPServerTransport } from '@modelcontextprotocol/sdk/server/streamableHttp.js';
+import express from 'express';
+import { type Server as HTTPServer } from 'node:http';
+
+import { randomUUID } from 'node:crypto';
+
+export class TestMcpServer {
+  private server: HTTPServer | undefined;
+
+  async start(): Promise<number> {
+    const app = express();
+    app.use(express.json());
+    const mcpServer = new McpServer(
+      {
+        name: 'test-mcp-server',
+        version: '1.0.0',
+      },
+      { capabilities: {} },
+    );
+
+    const transport = new StreamableHTTPServerTransport({
+      sessionIdGenerator: () => randomUUID(),
+    });
+    mcpServer.connect(transport);
+
+    app.post('/mcp', async (req, res) => {
+      await transport.handleRequest(req, res, req.body);
+    });
+
+    return new Promise((resolve, reject) => {
+      this.server = app.listen(0, () => {
+        const address = this.server!.address();
+        if (address && typeof address !== 'string') {
+          resolve(address.port);
+        } else {
+          reject(new Error('Could not determine server port.'));
+        }
+      });
+      this.server.on('error', reject);
+    });
+  }
+
+  async stop(): Promise<void> {
+    if (this.server) {
+      await new Promise<void>((resolve, reject) => {
+        this.server!.close((err?: Error) => {
+          if (err) {
+            reject(err);
+          } else {
+            resolve();
+          }
+        });
+      });
+      this.server = undefined;
+    }
+  }
+}