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| 1 | +import type { DevframeDefinition } from '../../types/devframe' |
| 2 | +import { Client } from '@modelcontextprotocol/sdk/client/index.js' |
| 3 | +import { StreamableHTTPClientTransport } from '@modelcontextprotocol/sdk/client/streamableHttp.js' |
| 4 | +import { getPort } from 'get-port-please' |
| 5 | +import { afterEach, describe, expect, it } from 'vitest' |
| 6 | +import { viteDevBridge } from '../vite' |
| 7 | + |
| 8 | +function defineTestDef(): DevframeDefinition { |
| 9 | + return { |
| 10 | + id: 'vite-bridge-test', |
| 11 | + name: 'Vite Bridge Test', |
| 12 | + version: '0.0.0', |
| 13 | + packageName: '@devframe/vite-bridge-test', |
| 14 | + homepage: '', |
| 15 | + description: '', |
| 16 | + setup(ctx) { |
| 17 | + ctx.agent.registerTool({ |
| 18 | + id: 'greet', |
| 19 | + description: 'Say hello.', |
| 20 | + safety: 'read', |
| 21 | + handler: () => ({ greeting: 'hi' }), |
| 22 | + }) |
| 23 | + }, |
| 24 | + } |
| 25 | +} |
| 26 | + |
| 27 | +interface FakeViteServer { |
| 28 | + middlewares: { use: (path: string, handler: any) => void } |
| 29 | + httpServer: null |
| 30 | + routes: Map<string, any> |
| 31 | +} |
| 32 | + |
| 33 | +function fakeViteServer(): FakeViteServer { |
| 34 | + const routes = new Map<string, any>() |
| 35 | + return { |
| 36 | + middlewares: { use: (path, handler) => routes.set(path, handler) }, |
| 37 | + httpServer: null, |
| 38 | + routes, |
| 39 | + } |
| 40 | +} |
| 41 | + |
| 42 | +/** Invoke a registered connect-style middleware and capture its JSON body. */ |
| 43 | +async function readJsonMiddleware(handler: any): Promise<any> { |
| 44 | + return await new Promise((resolvePromise) => { |
| 45 | + handler(undefined, { |
| 46 | + setHeader: () => {}, |
| 47 | + end: (body: string) => resolvePromise(JSON.parse(body)), |
| 48 | + }) |
| 49 | + }) |
| 50 | +} |
| 51 | + |
| 52 | +describe('viteDevBridge (bridge mode mcp)', () => { |
| 53 | + let bridge: ReturnType<typeof viteDevBridge> | undefined |
| 54 | + |
| 55 | + afterEach(async () => { |
| 56 | + await bridge?.closeBundle?.() |
| 57 | + bridge = undefined |
| 58 | + }) |
| 59 | + |
| 60 | + it('forwards the mcp option and advertises the side-car endpoint in the meta', async () => { |
| 61 | + const port = await getPort({ port: 19710, host: '127.0.0.1' }) |
| 62 | + bridge = viteDevBridge(defineTestDef(), { |
| 63 | + devMiddleware: { port, host: '127.0.0.1' }, |
| 64 | + mcp: true, |
| 65 | + }) |
| 66 | + |
| 67 | + const server = fakeViteServer() |
| 68 | + await bridge.configureServer(server) |
| 69 | + |
| 70 | + const metaHandler = server.routes.get('/__vite-bridge-test/__connection.json') |
| 71 | + expect(metaHandler).toBeDefined() |
| 72 | + const meta = await readJsonMiddleware(metaHandler) |
| 73 | + expect(meta.backend).toBe('websocket') |
| 74 | + expect(meta.websocket).toEqual({ port, path: '/__devframe_ws' }) |
| 75 | + expect(meta.mcp).toEqual({ port, path: '/__mcp' }) |
| 76 | + |
| 77 | + // The advertised endpoint is live: a real MCP client can connect and |
| 78 | + // list the agent tools on the side-car origin. |
| 79 | + const transport = new StreamableHTTPClientTransport(new URL(`http://127.0.0.1:${port}/__mcp`)) |
| 80 | + const client = new Client({ name: 'test-client', version: '0.0.0' }) |
| 81 | + try { |
| 82 | + await client.connect(transport) |
| 83 | + const tools = await client.listTools() |
| 84 | + expect(tools.tools.map(t => t.name)).toContain('greet') |
| 85 | + } |
| 86 | + finally { |
| 87 | + await client.close() |
| 88 | + } |
| 89 | + }) |
| 90 | + |
| 91 | + it('omits the mcp block when the option is not set', async () => { |
| 92 | + const port = await getPort({ port: 19720, host: '127.0.0.1' }) |
| 93 | + bridge = viteDevBridge(defineTestDef(), { |
| 94 | + devMiddleware: { port, host: '127.0.0.1' }, |
| 95 | + }) |
| 96 | + |
| 97 | + const server = fakeViteServer() |
| 98 | + await bridge.configureServer(server) |
| 99 | + |
| 100 | + const meta = await readJsonMiddleware(server.routes.get('/__vite-bridge-test/__connection.json')) |
| 101 | + expect(meta.mcp).toBeUndefined() |
| 102 | + }) |
| 103 | +}) |
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