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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { test, describe, before, after } from 'node:test';
import { strict as assert } from 'node:assert';
import { TestRig } from './test-helper.js';
import { spawn } from 'child_process';
import { join } from 'path';
import { fileURLToPath } from 'url';
import { writeFileSync, unlinkSync } from 'fs';
const __dirname = fileURLToPath(new URL('.', import.meta.url));
const serverScriptPath = join(__dirname, './temp-server.js');
const serverScript = `
import { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js';
import { z } from 'zod';
const server = new McpServer({
name: 'addition-server',
version: '1.0.0',
});
server.registerTool(
'add',
{
title: 'Addition Tool',
description: 'Add two numbers',
inputSchema: { a: z.number(), b: z.number() },
},
async ({ a, b }) => ({
content: [{ type: 'text', text: String(a + b) }],
}),
);
const transport = new StdioServerTransport();
await server.connect(transport);
`;
describe('simple-mcp-server', () => {
const rig = new TestRig();
let child;
before(() => {
writeFileSync(serverScriptPath, serverScript);
child = spawn('node', [serverScriptPath], {
stdio: ['pipe', 'pipe', 'pipe'],
});
child.stderr.on('data', (data) => {
console.error(`stderr: ${data}`);
});
// Wait for the server to be ready
return new Promise((resolve) => setTimeout(resolve, 500));
});
after(() => {
child.kill();
unlinkSync(serverScriptPath);
});
test('should add two numbers', () => {
rig.setup('should add two numbers');
const output = rig.run('add 5 and 10');
assert.ok(output.includes('15'));
});
});
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