lintianle
c65e05cff1
Prove the full MCP protocol flow works end-to-end against real servers: - Self-written fixture server: tool discovery, execution, error handling, image placeholder, toolPrefix, and clean disposal - @modelcontextprotocol/server-everything: echo, get-sum, get-tiny-image - @modelcontextprotocol/server-filesystem: write_file + read_file round-trip, list_directory with world-verification All 15 tests keyless and deterministic (no API key needed).
56 lines
1.6 KiB
TypeScript
56 lines
1.6 KiB
TypeScript
/**
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* Minimal MCP server over stdio for e2e testing of the dsh-mcp-client plugin.
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* Registers controlled tools with predictable behavior for asserting edge cases.
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*
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* Run: node --import tsx fixture-server.ts
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*/
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import { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js'
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import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js'
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import { z } from 'zod'
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const server = new McpServer(
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{ name: 'fixture-server', version: '1.0.0' },
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{ capabilities: { tools: { listChanged: true } } },
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)
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server.registerTool('add', {
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title: 'Add Tool',
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description: 'Adds two numbers.',
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inputSchema: { a: z.number().describe('First number'), b: z.number().describe('Second number') },
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}, async args => ({
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content: [{ type: 'text', text: String(args.a + args.b) }],
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}))
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server.registerTool('greet', {
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title: 'Greet Tool',
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description: 'Greets a person by name.',
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inputSchema: { name: z.string().describe('Name to greet') },
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}, async args => ({
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content: [{ type: 'text', text: `Hello, ${args.name}!` }],
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}))
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server.registerTool('fail', {
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title: 'Fail Tool',
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description: 'Always returns an error.',
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inputSchema: {},
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}, async () => ({
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content: [{ type: 'text', text: 'Something went wrong' }],
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isError: true,
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}))
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server.registerTool('image', {
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title: 'Image Tool',
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description: 'Returns an image content block.',
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inputSchema: {},
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}, async () => ({
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content: [
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{ type: 'text', text: 'Here is an image:' },
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{ type: 'image', data: 'iVBORw0KGgo=', mimeType: 'image/png' },
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{ type: 'text', text: 'End of image.' },
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],
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}))
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const transport = new StdioServerTransport()
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await server.connect(transport)
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