client.ts•2.69 kB
#!/usr/bin/env node
import { Client } from "@modelcontextprotocol/sdk/client/index.js";
import { StdioClientTransport } from "@modelcontextprotocol/sdk/client/stdio.js";
import { spawn } from "child_process";
import {
ListToolsResult,
CallToolResult
} from "@modelcontextprotocol/sdk/types.js";
class MCPTestClient {
private client: Client;
constructor() {
this.client = new Client(
{
name: "test-client",
version: "1.0.0",
},
{
capabilities: {},
}
);
}
async connect(): Promise<void> {
// Spawn the server process
const serverProcess = spawn("node", ["dist/server.js"], {
stdio: ["pipe", "pipe", "inherit"],
});
// Create transport using the server process
const transport = new StdioClientTransport({
stdin: serverProcess.stdin!,
stdout: serverProcess.stdout!,
} as any);
await this.client.connect(transport);
console.log("✅ Connected to MCP server");
}
async listTools(): Promise<void> {
try {
const response = await this.client.request(
{
method: "tools/list",
},
{} as any
) as ListToolsResult;
console.log("📚 Available tools:");
if (response.tools) {
response.tools.forEach((tool) => {
console.log(` - ${tool.name}: ${tool.description}`);
});
}
} catch (error) {
console.error("❌ Error listing tools:", error);
}
}
async testWordReversal(word: string): Promise<void> {
try {
console.log(`\n🔄 Testing word reversal with: "${word}"`);
const response = await this.client.request(
{
method: "tools/call",
},
{
name: "reverse_word",
arguments: { word },
} as any
) as CallToolResult;
if (response.content) {
response.content.forEach((content) => {
if (content.type === "text") {
console.log(`✨ Result: ${content.text}`);
}
});
}
} catch (error) {
console.error("❌ Error calling reverse_word tool:", error);
}
}
async runTests(): Promise<void> {
console.log("🚀 Starting MCP Client Tests\n");
try {
await this.connect();
await this.listTools();
// Test cases
const testWords = ["hello", "world", "mcp", "server", "demo"];
for (const word of testWords) {
await this.testWordReversal(word);
}
console.log("\n✅ All tests completed!");
} catch (error) {
console.error("❌ Test failed:", error);
}
}
}
const client = new MCPTestClient();
client.runTests().catch(console.error);