2926 lines
69 KiB
TypeScript
2926 lines
69 KiB
TypeScript
import { McpServer } from "./mcp.js";
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import { Client } from "../client/index.js";
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import { InMemoryTransport } from "../inMemory.js";
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import { z } from "zod";
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import {
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ListToolsResultSchema,
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CallToolResultSchema,
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ListResourcesResultSchema,
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ListResourceTemplatesResultSchema,
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ReadResourceResultSchema,
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ListPromptsResultSchema,
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GetPromptResultSchema,
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CompleteResultSchema,
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LoggingMessageNotificationSchema,
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Notification,
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} from "../types.js";
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import { ResourceTemplate, CapabilityEvent } from "./mcp.js";
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import { completable } from "./completable.js";
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import { UriTemplate } from "../shared/uriTemplate.js";
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describe("McpServer", () => {
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test("should expose underlying Server instance", () => {
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const mcpServer = new McpServer({
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name: "test server",
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version: "1.0",
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});
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expect(mcpServer.server).toBeDefined();
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expect(mcpServer.server.getVersion()).toEqual({
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name: "test server",
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version: "1.0",
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});
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});
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test("should allow sending notifications via Server", async () => {
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const mcpServer = new McpServer(
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{
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name: "test server",
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version: "1.0",
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},
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{ capabilities: { logging: {} } },
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);
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const notifications: Notification[] = []
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const client = new Client({
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name: "test client",
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version: "1.0",
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});
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client.fallbackNotificationHandler = async (notification) => {
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notifications.push(notification)
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}
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const [clientTransport, serverTransport] =
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InMemoryTransport.createLinkedPair();
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await Promise.all([
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client.connect(clientTransport),
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mcpServer.server.connect(serverTransport),
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]);
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// This should work because we're using the underlying server
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await expect(
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mcpServer.server.sendLoggingMessage({
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level: "info",
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data: "Test log message",
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}),
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).resolves.not.toThrow();
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expect(notifications).toMatchObject([
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{
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"method": "notifications/message",
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params: {
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level: "info",
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data: "Test log message",
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}
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}
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])
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});
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});
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describe("ResourceTemplate", () => {
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test("should create ResourceTemplate with string pattern", () => {
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const template = new ResourceTemplate("test://{category}/{id}", {
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list: undefined,
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});
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expect(template.uriTemplate.toString()).toBe("test://{category}/{id}");
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expect(template.listCallback).toBeUndefined();
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});
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test("should create ResourceTemplate with UriTemplate", () => {
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const uriTemplate = new UriTemplate("test://{category}/{id}");
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const template = new ResourceTemplate(uriTemplate, { list: undefined });
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expect(template.uriTemplate).toBe(uriTemplate);
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expect(template.listCallback).toBeUndefined();
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});
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test("should create ResourceTemplate with list callback", async () => {
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const list = jest.fn().mockResolvedValue({
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resources: [{ name: "Test", uri: "test://example" }],
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});
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const template = new ResourceTemplate("test://{id}", { list });
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expect(template.listCallback).toBe(list);
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const abortController = new AbortController();
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const result = await template.listCallback?.({
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signal: abortController.signal,
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sendRequest: () => { throw new Error("Not implemented") },
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sendNotification: () => { throw new Error("Not implemented") }
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});
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expect(result?.resources).toHaveLength(1);
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expect(list).toHaveBeenCalled();
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});
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});
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describe("tool()", () => {
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test("should register zero-argument tool", async () => {
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const mcpServer = new McpServer({
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name: "test server",
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version: "1.0",
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});
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const notifications: Notification[] = []
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const client = new Client({
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name: "test client",
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version: "1.0",
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});
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client.fallbackNotificationHandler = async (notification) => {
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notifications.push(notification)
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}
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mcpServer.tool("test", async () => ({
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content: [
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{
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type: "text",
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text: "Test response",
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},
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],
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}));
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const [clientTransport, serverTransport] =
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InMemoryTransport.createLinkedPair();
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await Promise.all([
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client.connect(clientTransport),
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mcpServer.connect(serverTransport),
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]);
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const result = await client.request(
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{
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method: "tools/list",
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},
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ListToolsResultSchema,
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);
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expect(result.tools).toHaveLength(1);
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expect(result.tools[0].name).toBe("test");
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expect(result.tools[0].inputSchema).toEqual({
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type: "object",
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});
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// Adding the tool before the connection was established means no notification was sent
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expect(notifications).toHaveLength(0)
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// Adding another tool triggers the update notification
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mcpServer.tool("test2", async () => ({
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content: [
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{
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type: "text",
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text: "Test response",
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},
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],
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}));
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// Yield event loop to let the notification fly
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await new Promise(process.nextTick)
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expect(notifications).toMatchObject([
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{
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method: "notifications/tools/list_changed",
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}
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])
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});
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test("should update existing tool", async () => {
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const mcpServer = new McpServer({
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name: "test server",
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version: "1.0",
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});
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const notifications: Notification[] = []
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const client = new Client({
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name: "test client",
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version: "1.0",
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});
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client.fallbackNotificationHandler = async (notification) => {
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notifications.push(notification)
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}
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// Register initial tool
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const tool = mcpServer.tool("test", async () => ({
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content: [
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{
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type: "text",
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text: "Initial response",
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},
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],
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}));
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// Update the tool
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tool.update({
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callback: async () => ({
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content: [
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{
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type: "text",
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text: "Updated response",
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},
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],
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})
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});
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const [clientTransport, serverTransport] =
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InMemoryTransport.createLinkedPair();
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await Promise.all([
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client.connect(clientTransport),
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mcpServer.connect(serverTransport),
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]);
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// Call the tool and verify we get the updated response
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const result = await client.request(
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{
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method: "tools/call",
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params: {
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name: "test",
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},
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},
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CallToolResultSchema,
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);
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expect(result.content).toEqual([
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{
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type: "text",
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text: "Updated response",
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},
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]);
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// Update happened before transport was connected, so no notifications should be expected
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expect(notifications).toHaveLength(0)
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});
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test("should update tool with schema", async () => {
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const mcpServer = new McpServer({
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name: "test server",
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version: "1.0",
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});
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const notifications: Notification[] = []
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const client = new Client({
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name: "test client",
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version: "1.0",
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});
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client.fallbackNotificationHandler = async (notification) => {
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notifications.push(notification)
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}
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// Register initial tool
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const tool = mcpServer.tool(
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"test",
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{
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name: z.string(),
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},
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async ({ name }) => ({
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content: [
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{
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type: "text",
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text: `Initial: ${name}`,
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},
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],
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}),
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);
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// Update the tool with a different schema
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tool.update({
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paramsSchema: {
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name: z.string(),
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value: z.number(),
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},
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callback: async ({name, value}) => ({
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content: [
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{
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type: "text",
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text: `Updated: ${name}, ${value}`,
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},
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],
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})
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});
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const [clientTransport, serverTransport] =
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InMemoryTransport.createLinkedPair();
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await Promise.all([
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client.connect(clientTransport),
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mcpServer.connect(serverTransport),
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]);
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// Verify the schema was updated
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const listResult = await client.request(
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{
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method: "tools/list",
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},
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ListToolsResultSchema,
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);
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expect(listResult.tools[0].inputSchema).toMatchObject({
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properties: {
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name: { type: "string" },
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value: { type: "number" },
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},
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});
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// Call the tool with the new schema
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const callResult = await client.request(
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{
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method: "tools/call",
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params: {
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name: "test",
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arguments: {
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name: "test",
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value: 42,
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},
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},
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},
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CallToolResultSchema,
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);
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expect(callResult.content).toEqual([
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{
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type: "text",
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text: "Updated: test, 42",
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},
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]);
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// Update happened before transport was connected, so no notifications should be expected
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expect(notifications).toHaveLength(0)
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});
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test("should send tool list changed notifications when connected", async () => {
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const mcpServer = new McpServer({
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name: "test server",
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version: "1.0",
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});
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const notifications: Notification[] = []
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const client = new Client({
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name: "test client",
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version: "1.0",
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});
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client.fallbackNotificationHandler = async (notification) => {
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notifications.push(notification)
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}
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// Register initial tool
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const tool = mcpServer.tool("test", async () => ({
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content: [
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{
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type: "text",
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text: "Test response",
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},
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],
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}));
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const [clientTransport, serverTransport] =
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InMemoryTransport.createLinkedPair();
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await Promise.all([
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client.connect(clientTransport),
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mcpServer.connect(serverTransport),
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]);
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expect(notifications).toHaveLength(0)
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// Now update the tool
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tool.update({
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callback: async () => ({
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content: [
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{
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type: "text",
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text: "Updated response",
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},
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],
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})
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});
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// Yield event loop to let the notification fly
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await new Promise(process.nextTick)
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expect(notifications).toMatchObject([
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{ method: "notifications/tools/list_changed" }
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])
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// Now delete the tool
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tool.remove();
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// Yield event loop to let the notification fly
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await new Promise(process.nextTick)
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expect(notifications).toMatchObject([
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{ method: "notifications/tools/list_changed" },
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{ method: "notifications/tools/list_changed" },
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])
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});
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test("should register tool with args schema", async () => {
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const mcpServer = new McpServer({
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name: "test server",
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version: "1.0",
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});
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const client = new Client({
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name: "test client",
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version: "1.0",
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});
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mcpServer.tool(
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"test",
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{
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name: z.string(),
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value: z.number(),
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},
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async ({ name, value }) => ({
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content: [
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{
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type: "text",
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text: `${name}: ${value}`,
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},
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],
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}),
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);
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const [clientTransport, serverTransport] =
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InMemoryTransport.createLinkedPair();
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await Promise.all([
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client.connect(clientTransport),
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mcpServer.server.connect(serverTransport),
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]);
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const result = await client.request(
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{
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method: "tools/list",
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},
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ListToolsResultSchema,
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);
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expect(result.tools).toHaveLength(1);
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expect(result.tools[0].name).toBe("test");
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expect(result.tools[0].inputSchema).toMatchObject({
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type: "object",
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properties: {
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name: { type: "string" },
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value: { type: "number" },
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},
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});
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});
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test("should register tool with description", async () => {
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const mcpServer = new McpServer({
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name: "test server",
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version: "1.0",
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});
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const client = new Client({
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name: "test client",
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version: "1.0",
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});
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mcpServer.tool("test", "Test description", async () => ({
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content: [
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{
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type: "text",
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text: "Test response",
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},
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],
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}));
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const [clientTransport, serverTransport] =
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InMemoryTransport.createLinkedPair();
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await Promise.all([
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client.connect(clientTransport),
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mcpServer.server.connect(serverTransport),
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]);
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const result = await client.request(
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{
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method: "tools/list",
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},
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ListToolsResultSchema,
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);
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expect(result.tools).toHaveLength(1);
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expect(result.tools[0].name).toBe("test");
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expect(result.tools[0].description).toBe("Test description");
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});
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test("should validate tool args", async () => {
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const mcpServer = new McpServer({
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name: "test server",
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version: "1.0",
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});
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const client = new Client(
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{
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name: "test client",
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version: "1.0",
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},
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{
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capabilities: {
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tools: {},
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},
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},
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);
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mcpServer.tool(
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"test",
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{
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name: z.string(),
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value: z.number(),
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},
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async ({ name, value }) => ({
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content: [
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{
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type: "text",
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text: `${name}: ${value}`,
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},
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],
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}),
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);
|
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|
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const [clientTransport, serverTransport] =
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InMemoryTransport.createLinkedPair();
|
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await Promise.all([
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client.connect(clientTransport),
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mcpServer.server.connect(serverTransport),
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]);
|
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await expect(
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client.request(
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{
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method: "tools/call",
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params: {
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name: "test",
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arguments: {
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name: "test",
|
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value: "not a number",
|
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},
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},
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},
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CallToolResultSchema,
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),
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).rejects.toThrow(/Invalid arguments/);
|
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});
|
|
|
|
test("should prevent duplicate tool registration", () => {
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const mcpServer = new McpServer({
|
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name: "test server",
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version: "1.0",
|
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});
|
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mcpServer.tool("test", async () => ({
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content: [
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{
|
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type: "text",
|
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text: "Test response",
|
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},
|
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],
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}));
|
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|
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expect(() => {
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mcpServer.tool("test", async () => ({
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content: [
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{
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type: "text",
|
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text: "Test response 2",
|
|
},
|
|
],
|
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}));
|
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}).toThrow(/already registered/);
|
|
});
|
|
|
|
test("should allow registering multiple tools", () => {
|
|
const mcpServer = new McpServer({
|
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name: "test server",
|
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version: "1.0",
|
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});
|
|
|
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// This should succeed
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mcpServer.tool("tool1", () => ({ content: [] }));
|
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// This should also succeed and not throw about request handlers
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mcpServer.tool("tool2", () => ({ content: [] }));
|
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});
|
|
|
|
test("should pass sessionId to tool callback via RequestHandlerExtra", async () => {
|
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const mcpServer = new McpServer({
|
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name: "test server",
|
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version: "1.0",
|
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});
|
|
|
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const client = new Client(
|
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{
|
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name: "test client",
|
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version: "1.0",
|
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},
|
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{
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capabilities: {
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tools: {},
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},
|
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},
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);
|
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|
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let receivedSessionId: string | undefined;
|
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mcpServer.tool("test-tool", async (extra) => {
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receivedSessionId = extra.sessionId;
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return {
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content: [
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{
|
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type: "text",
|
|
text: "Test response",
|
|
},
|
|
],
|
|
};
|
|
});
|
|
|
|
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
|
|
// Set a test sessionId on the server transport
|
|
serverTransport.sessionId = "test-session-123";
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
await client.request(
|
|
{
|
|
method: "tools/call",
|
|
params: {
|
|
name: "test-tool",
|
|
},
|
|
},
|
|
CallToolResultSchema,
|
|
);
|
|
|
|
expect(receivedSessionId).toBe("test-session-123");
|
|
});
|
|
|
|
test("should provide sendNotification within tool call", async () => {
|
|
const mcpServer = new McpServer(
|
|
{
|
|
name: "test server",
|
|
version: "1.0",
|
|
},
|
|
{ capabilities: { logging: {} } },
|
|
);
|
|
|
|
const client = new Client(
|
|
{
|
|
name: "test client",
|
|
version: "1.0",
|
|
},
|
|
{
|
|
capabilities: {
|
|
tools: {},
|
|
},
|
|
},
|
|
);
|
|
|
|
let receivedLogMessage: string | undefined;
|
|
const loggingMessage = "hello here is log message 1";
|
|
|
|
client.setNotificationHandler(LoggingMessageNotificationSchema, (notification) => {
|
|
receivedLogMessage = notification.params.data as string;
|
|
});
|
|
|
|
mcpServer.tool("test-tool", async ({ sendNotification }) => {
|
|
await sendNotification({ method: "notifications/message", params: { level: "debug", data: loggingMessage } });
|
|
return {
|
|
content: [
|
|
{
|
|
type: "text",
|
|
text: "Test response",
|
|
},
|
|
],
|
|
};
|
|
});
|
|
|
|
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
await client.request(
|
|
{
|
|
method: "tools/call",
|
|
params: {
|
|
name: "test-tool",
|
|
},
|
|
},
|
|
CallToolResultSchema,
|
|
);
|
|
expect(receivedLogMessage).toBe(loggingMessage);
|
|
});
|
|
|
|
test("should allow client to call server tools", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
const client = new Client(
|
|
{
|
|
name: "test client",
|
|
version: "1.0",
|
|
},
|
|
{
|
|
capabilities: {
|
|
tools: {},
|
|
},
|
|
},
|
|
);
|
|
|
|
mcpServer.tool(
|
|
"test",
|
|
"Test tool",
|
|
{
|
|
input: z.string(),
|
|
},
|
|
async ({ input }) => ({
|
|
content: [
|
|
{
|
|
type: "text",
|
|
text: `Processed: ${input}`,
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
const result = await client.request(
|
|
{
|
|
method: "tools/call",
|
|
params: {
|
|
name: "test",
|
|
arguments: {
|
|
input: "hello",
|
|
},
|
|
},
|
|
},
|
|
CallToolResultSchema,
|
|
);
|
|
|
|
expect(result.content).toEqual([
|
|
{
|
|
type: "text",
|
|
text: "Processed: hello",
|
|
},
|
|
]);
|
|
});
|
|
|
|
test("should handle server tool errors gracefully", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
const client = new Client(
|
|
{
|
|
name: "test client",
|
|
version: "1.0",
|
|
},
|
|
{
|
|
capabilities: {
|
|
tools: {},
|
|
},
|
|
},
|
|
);
|
|
|
|
mcpServer.tool("error-test", async () => {
|
|
throw new Error("Tool execution failed");
|
|
});
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
const result = await client.request(
|
|
{
|
|
method: "tools/call",
|
|
params: {
|
|
name: "error-test",
|
|
},
|
|
},
|
|
CallToolResultSchema,
|
|
);
|
|
|
|
expect(result.isError).toBe(true);
|
|
expect(result.content).toEqual([
|
|
{
|
|
type: "text",
|
|
text: "Tool execution failed",
|
|
},
|
|
]);
|
|
});
|
|
|
|
test("should throw McpError for invalid tool name", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
const client = new Client(
|
|
{
|
|
name: "test client",
|
|
version: "1.0",
|
|
},
|
|
{
|
|
capabilities: {
|
|
tools: {},
|
|
},
|
|
},
|
|
);
|
|
|
|
mcpServer.tool("test-tool", async () => ({
|
|
content: [
|
|
{
|
|
type: "text",
|
|
text: "Test response",
|
|
},
|
|
],
|
|
}));
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
await expect(
|
|
client.request(
|
|
{
|
|
method: "tools/call",
|
|
params: {
|
|
name: "nonexistent-tool",
|
|
},
|
|
},
|
|
CallToolResultSchema,
|
|
),
|
|
).rejects.toThrow(/Tool nonexistent-tool not found/);
|
|
});
|
|
|
|
test("should include duration in completed and error events", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
|
|
const events: Array<CapabilityEvent> = [];
|
|
const subscription = mcpServer.onCapabilityChange((event) => {
|
|
events.push(event);
|
|
});
|
|
|
|
// Register tools with different behaviors
|
|
mcpServer.tool("success-tool", async () => {
|
|
// Simulate some work
|
|
await new Promise(resolve => setTimeout(resolve, 10));
|
|
return { content: [{ type: "text", text: "Success" }] };
|
|
});
|
|
|
|
mcpServer.tool("error-tool", async () => {
|
|
// Simulate some work
|
|
await new Promise(resolve => setTimeout(resolve, 10));
|
|
throw new Error("Simulated error");
|
|
});
|
|
|
|
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.connect(serverTransport),
|
|
]);
|
|
|
|
// Clear events from registration
|
|
events.length = 0;
|
|
|
|
// Call the success tool
|
|
await client.request(
|
|
{
|
|
method: "tools/call",
|
|
params: {
|
|
name: "success-tool",
|
|
},
|
|
},
|
|
CallToolResultSchema,
|
|
);
|
|
|
|
// Find the completed event
|
|
const completedEvent = events.find(e =>
|
|
e.capabilityType === "tool" &&
|
|
e.capabilityName === "success-tool" &&
|
|
e.action === "completed"
|
|
) as Extract<CapabilityEvent, { action: "completed" }>;
|
|
|
|
expect(completedEvent).toBeDefined();
|
|
expect(completedEvent.durationMs).toBeDefined();
|
|
expect(completedEvent.durationMs).toBeGreaterThan(0);
|
|
|
|
// Clear events
|
|
events.length = 0;
|
|
|
|
// Call the error tool
|
|
await client.request(
|
|
{
|
|
method: "tools/call",
|
|
params: {
|
|
name: "error-tool",
|
|
},
|
|
},
|
|
CallToolResultSchema,
|
|
);
|
|
|
|
// Find the error event
|
|
const errorEvent = events.find(e =>
|
|
e.capabilityType === "tool" &&
|
|
e.capabilityName === "error-tool" &&
|
|
e.action === "error"
|
|
) as Extract<CapabilityEvent, { action: "error" }>;
|
|
|
|
expect(errorEvent).toBeDefined();
|
|
expect(errorEvent.durationMs).toBeDefined();
|
|
expect(errorEvent.durationMs).toBeGreaterThan(0);
|
|
|
|
subscription.close();
|
|
});
|
|
});
|
|
|
|
describe("resource()", () => {
|
|
test("should register resource with uri and readCallback", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
|
|
mcpServer.resource("test", "test://resource", async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource",
|
|
text: "Test content",
|
|
},
|
|
],
|
|
}));
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
const result = await client.request(
|
|
{
|
|
method: "resources/list",
|
|
},
|
|
ListResourcesResultSchema,
|
|
);
|
|
|
|
expect(result.resources).toHaveLength(1);
|
|
expect(result.resources[0].name).toBe("test");
|
|
expect(result.resources[0].uri).toBe("test://resource");
|
|
});
|
|
|
|
test("should update resource with uri", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const notifications: Notification[] = [];
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
client.fallbackNotificationHandler = async (notification) => {
|
|
notifications.push(notification);
|
|
};
|
|
|
|
// Register initial resource
|
|
const resource = mcpServer.resource("test", "test://resource", async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource",
|
|
text: "Initial content",
|
|
},
|
|
],
|
|
}));
|
|
|
|
// Update the resource
|
|
resource.update({
|
|
callback: async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource",
|
|
text: "Updated content",
|
|
},
|
|
],
|
|
})
|
|
});
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.connect(serverTransport),
|
|
]);
|
|
|
|
// Read the resource and verify we get the updated content
|
|
const result = await client.request(
|
|
{
|
|
method: "resources/read",
|
|
params: {
|
|
uri: "test://resource",
|
|
},
|
|
},
|
|
ReadResourceResultSchema,
|
|
);
|
|
|
|
expect(result.contents).toHaveLength(1);
|
|
expect(result.contents[0].text).toBe("Updated content");
|
|
|
|
// Update happened before transport was connected, so no notifications should be expected
|
|
expect(notifications).toHaveLength(0);
|
|
});
|
|
|
|
test("should update resource template", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const notifications: Notification[] = [];
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
client.fallbackNotificationHandler = async (notification) => {
|
|
notifications.push(notification);
|
|
};
|
|
|
|
// Register initial resource template
|
|
const resourceTemplate = mcpServer.resource(
|
|
"test",
|
|
new ResourceTemplate("test://resource/{id}", { list: undefined }),
|
|
async (uri) => ({
|
|
contents: [
|
|
{
|
|
uri: uri.href,
|
|
text: "Initial content",
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
|
|
// Update the resource template
|
|
resourceTemplate.update({
|
|
callback: async (uri) => ({
|
|
contents: [
|
|
{
|
|
uri: uri.href,
|
|
text: "Updated content",
|
|
},
|
|
],
|
|
})
|
|
});
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.connect(serverTransport),
|
|
]);
|
|
|
|
// Read the resource and verify we get the updated content
|
|
const result = await client.request(
|
|
{
|
|
method: "resources/read",
|
|
params: {
|
|
uri: "test://resource/123",
|
|
},
|
|
},
|
|
ReadResourceResultSchema,
|
|
);
|
|
|
|
expect(result.contents).toHaveLength(1);
|
|
expect(result.contents[0].text).toBe("Updated content");
|
|
|
|
// Update happened before transport was connected, so no notifications should be expected
|
|
expect(notifications).toHaveLength(0);
|
|
});
|
|
|
|
test("should send resource list changed notification when connected", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const notifications: Notification[] = [];
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
client.fallbackNotificationHandler = async (notification) => {
|
|
notifications.push(notification);
|
|
};
|
|
|
|
// Register initial resource
|
|
const resource = mcpServer.resource("test", "test://resource", async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource",
|
|
text: "Test content",
|
|
},
|
|
],
|
|
}));
|
|
|
|
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.connect(serverTransport),
|
|
]);
|
|
|
|
expect(notifications).toHaveLength(0);
|
|
|
|
// Now update the resource while connected
|
|
resource.update({
|
|
callback: async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource",
|
|
text: "Updated content",
|
|
},
|
|
],
|
|
})
|
|
});
|
|
|
|
// Yield event loop to let the notification fly
|
|
await new Promise(process.nextTick);
|
|
|
|
expect(notifications).toMatchObject([
|
|
{ method: "notifications/resources/list_changed" }
|
|
]);
|
|
});
|
|
|
|
test("should remove resource and send notification when connected", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const notifications: Notification[] = [];
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
client.fallbackNotificationHandler = async (notification) => {
|
|
notifications.push(notification);
|
|
};
|
|
|
|
// Register initial resources
|
|
const resource1 = mcpServer.resource("resource1", "test://resource1", async () => ({
|
|
contents: [{ uri: "test://resource1", text: "Resource 1 content" }],
|
|
}));
|
|
|
|
mcpServer.resource("resource2", "test://resource2", async () => ({
|
|
contents: [{ uri: "test://resource2", text: "Resource 2 content" }],
|
|
}));
|
|
|
|
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.connect(serverTransport),
|
|
]);
|
|
|
|
// Verify both resources are registered
|
|
let result = await client.request(
|
|
{ method: "resources/list" },
|
|
ListResourcesResultSchema,
|
|
);
|
|
|
|
expect(result.resources).toHaveLength(2);
|
|
|
|
expect(notifications).toHaveLength(0);
|
|
|
|
// Remove a resource
|
|
resource1.remove()
|
|
|
|
// Yield event loop to let the notification fly
|
|
await new Promise(process.nextTick);
|
|
|
|
// Should have sent notification
|
|
expect(notifications).toMatchObject([
|
|
{ method: "notifications/resources/list_changed" }
|
|
]);
|
|
|
|
// Verify the resource was removed
|
|
result = await client.request(
|
|
{ method: "resources/list" },
|
|
ListResourcesResultSchema,
|
|
);
|
|
|
|
expect(result.resources).toHaveLength(1);
|
|
expect(result.resources[0].uri).toBe("test://resource2");
|
|
});
|
|
|
|
test("should remove resource template and send notification when connected", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const notifications: Notification[] = [];
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
client.fallbackNotificationHandler = async (notification) => {
|
|
notifications.push(notification);
|
|
};
|
|
|
|
// Register resource template
|
|
const resourceTemplate = mcpServer.resource(
|
|
"template",
|
|
new ResourceTemplate("test://resource/{id}", { list: undefined }),
|
|
async (uri) => ({
|
|
contents: [
|
|
{
|
|
uri: uri.href,
|
|
text: "Template content",
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
|
|
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.connect(serverTransport),
|
|
]);
|
|
|
|
// Verify template is registered
|
|
const result = await client.request(
|
|
{ method: "resources/templates/list" },
|
|
ListResourceTemplatesResultSchema,
|
|
);
|
|
|
|
expect(result.resourceTemplates).toHaveLength(1);
|
|
expect(notifications).toHaveLength(0);
|
|
|
|
// Remove the template
|
|
resourceTemplate.remove()
|
|
|
|
// Yield event loop to let the notification fly
|
|
await new Promise(process.nextTick);
|
|
|
|
// Should have sent notification
|
|
expect(notifications).toMatchObject([
|
|
{ method: "notifications/resources/list_changed" }
|
|
]);
|
|
|
|
// Verify the template was removed
|
|
const result2 = await client.request(
|
|
{ method: "resources/templates/list" },
|
|
ListResourceTemplatesResultSchema,
|
|
);
|
|
|
|
expect(result2.resourceTemplates).toHaveLength(0);
|
|
});
|
|
|
|
test("should register resource with metadata", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
|
|
mcpServer.resource(
|
|
"test",
|
|
"test://resource",
|
|
{
|
|
description: "Test resource",
|
|
mimeType: "text/plain",
|
|
},
|
|
async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource",
|
|
text: "Test content",
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
const result = await client.request(
|
|
{
|
|
method: "resources/list",
|
|
},
|
|
ListResourcesResultSchema,
|
|
);
|
|
|
|
expect(result.resources).toHaveLength(1);
|
|
expect(result.resources[0].description).toBe("Test resource");
|
|
expect(result.resources[0].mimeType).toBe("text/plain");
|
|
});
|
|
|
|
test("should register resource template", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
|
|
mcpServer.resource(
|
|
"test",
|
|
new ResourceTemplate("test://resource/{id}", { list: undefined }),
|
|
async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource/123",
|
|
text: "Test content",
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
const result = await client.request(
|
|
{
|
|
method: "resources/templates/list",
|
|
},
|
|
ListResourceTemplatesResultSchema,
|
|
);
|
|
|
|
expect(result.resourceTemplates).toHaveLength(1);
|
|
expect(result.resourceTemplates[0].name).toBe("test");
|
|
expect(result.resourceTemplates[0].uriTemplate).toBe(
|
|
"test://resource/{id}",
|
|
);
|
|
});
|
|
|
|
test("should register resource template with listCallback", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
|
|
mcpServer.resource(
|
|
"test",
|
|
new ResourceTemplate("test://resource/{id}", {
|
|
list: async () => ({
|
|
resources: [
|
|
{
|
|
name: "Resource 1",
|
|
uri: "test://resource/1",
|
|
},
|
|
{
|
|
name: "Resource 2",
|
|
uri: "test://resource/2",
|
|
},
|
|
],
|
|
}),
|
|
}),
|
|
async (uri) => ({
|
|
contents: [
|
|
{
|
|
uri: uri.href,
|
|
text: "Test content",
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
const result = await client.request(
|
|
{
|
|
method: "resources/list",
|
|
},
|
|
ListResourcesResultSchema,
|
|
);
|
|
|
|
expect(result.resources).toHaveLength(2);
|
|
expect(result.resources[0].name).toBe("Resource 1");
|
|
expect(result.resources[0].uri).toBe("test://resource/1");
|
|
expect(result.resources[1].name).toBe("Resource 2");
|
|
expect(result.resources[1].uri).toBe("test://resource/2");
|
|
});
|
|
|
|
test("should pass template variables to readCallback", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
|
|
mcpServer.resource(
|
|
"test",
|
|
new ResourceTemplate("test://resource/{category}/{id}", {
|
|
list: undefined,
|
|
}),
|
|
async (uri, { category, id }) => ({
|
|
contents: [
|
|
{
|
|
uri: uri.href,
|
|
text: `Category: ${category}, ID: ${id}`,
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
const result = await client.request(
|
|
{
|
|
method: "resources/read",
|
|
params: {
|
|
uri: "test://resource/books/123",
|
|
},
|
|
},
|
|
ReadResourceResultSchema,
|
|
);
|
|
|
|
expect(result.contents[0].text).toBe("Category: books, ID: 123");
|
|
});
|
|
|
|
test("should prevent duplicate resource registration", () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
mcpServer.resource("test", "test://resource", async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource",
|
|
text: "Test content",
|
|
},
|
|
],
|
|
}));
|
|
|
|
expect(() => {
|
|
mcpServer.resource("test2", "test://resource", async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource",
|
|
text: "Test content 2",
|
|
},
|
|
],
|
|
}));
|
|
}).toThrow(/already registered/);
|
|
});
|
|
|
|
test("should allow registering multiple resources", () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
// This should succeed
|
|
mcpServer.resource("resource1", "test://resource1", async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource1",
|
|
text: "Test content 1",
|
|
},
|
|
],
|
|
}));
|
|
|
|
// This should also succeed and not throw about request handlers
|
|
mcpServer.resource("resource2", "test://resource2", async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource2",
|
|
text: "Test content 2",
|
|
},
|
|
],
|
|
}));
|
|
});
|
|
|
|
test("should prevent duplicate resource template registration", () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
mcpServer.resource(
|
|
"test",
|
|
new ResourceTemplate("test://resource/{id}", { list: undefined }),
|
|
async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource/123",
|
|
text: "Test content",
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
|
|
expect(() => {
|
|
mcpServer.resource(
|
|
"test",
|
|
new ResourceTemplate("test://resource/{id}", { list: undefined }),
|
|
async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource/123",
|
|
text: "Test content 2",
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
}).toThrow(/already registered/);
|
|
});
|
|
|
|
test("should handle resource read errors gracefully", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
|
|
mcpServer.resource("error-test", "test://error", async () => {
|
|
throw new Error("Resource read failed");
|
|
});
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
await expect(
|
|
client.request(
|
|
{
|
|
method: "resources/read",
|
|
params: {
|
|
uri: "test://error",
|
|
},
|
|
},
|
|
ReadResourceResultSchema,
|
|
),
|
|
).rejects.toThrow(/Resource read failed/);
|
|
});
|
|
|
|
test("should throw McpError for invalid resource URI", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
|
|
mcpServer.resource("test", "test://resource", async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource",
|
|
text: "Test content",
|
|
},
|
|
],
|
|
}));
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
await expect(
|
|
client.request(
|
|
{
|
|
method: "resources/read",
|
|
params: {
|
|
uri: "test://nonexistent",
|
|
},
|
|
},
|
|
ReadResourceResultSchema,
|
|
),
|
|
).rejects.toThrow(/Resource test:\/\/nonexistent not found/);
|
|
});
|
|
|
|
test("should support completion of resource template parameters", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
const client = new Client(
|
|
{
|
|
name: "test client",
|
|
version: "1.0",
|
|
},
|
|
{
|
|
capabilities: {
|
|
resources: {},
|
|
},
|
|
},
|
|
);
|
|
|
|
mcpServer.resource(
|
|
"test",
|
|
new ResourceTemplate("test://resource/{category}", {
|
|
list: undefined,
|
|
complete: {
|
|
category: () => ["books", "movies", "music"],
|
|
},
|
|
}),
|
|
async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource/test",
|
|
text: "Test content",
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
const result = await client.request(
|
|
{
|
|
method: "completion/complete",
|
|
params: {
|
|
ref: {
|
|
type: "ref/resource",
|
|
uri: "test://resource/{category}",
|
|
},
|
|
argument: {
|
|
name: "category",
|
|
value: "",
|
|
},
|
|
},
|
|
},
|
|
CompleteResultSchema,
|
|
);
|
|
|
|
expect(result.completion.values).toEqual(["books", "movies", "music"]);
|
|
expect(result.completion.total).toBe(3);
|
|
});
|
|
|
|
test("should support filtered completion of resource template parameters", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
const client = new Client(
|
|
{
|
|
name: "test client",
|
|
version: "1.0",
|
|
},
|
|
{
|
|
capabilities: {
|
|
resources: {},
|
|
},
|
|
},
|
|
);
|
|
|
|
mcpServer.resource(
|
|
"test",
|
|
new ResourceTemplate("test://resource/{category}", {
|
|
list: undefined,
|
|
complete: {
|
|
category: (test: string) =>
|
|
["books", "movies", "music"].filter((value) =>
|
|
value.startsWith(test),
|
|
),
|
|
},
|
|
}),
|
|
async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource/test",
|
|
text: "Test content",
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
const result = await client.request(
|
|
{
|
|
method: "completion/complete",
|
|
params: {
|
|
ref: {
|
|
type: "ref/resource",
|
|
uri: "test://resource/{category}",
|
|
},
|
|
argument: {
|
|
name: "category",
|
|
value: "m",
|
|
},
|
|
},
|
|
},
|
|
CompleteResultSchema,
|
|
);
|
|
|
|
expect(result.completion.values).toEqual(["movies", "music"]);
|
|
expect(result.completion.total).toBe(2);
|
|
});
|
|
});
|
|
|
|
describe("prompt()", () => {
|
|
test("should register zero-argument prompt", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
|
|
mcpServer.prompt("test", async () => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: "Test response",
|
|
},
|
|
},
|
|
],
|
|
}));
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
const result = await client.request(
|
|
{
|
|
method: "prompts/list",
|
|
},
|
|
ListPromptsResultSchema,
|
|
);
|
|
|
|
expect(result.prompts).toHaveLength(1);
|
|
expect(result.prompts[0].name).toBe("test");
|
|
expect(result.prompts[0].arguments).toBeUndefined();
|
|
});
|
|
test("should update existing prompt", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const notifications: Notification[] = [];
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
client.fallbackNotificationHandler = async (notification) => {
|
|
notifications.push(notification);
|
|
};
|
|
|
|
// Register initial prompt
|
|
const prompt = mcpServer.prompt("test", async () => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: "Initial response",
|
|
},
|
|
},
|
|
],
|
|
}));
|
|
|
|
// Update the prompt
|
|
prompt.update({
|
|
callback: async () => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: "Updated response",
|
|
},
|
|
},
|
|
],
|
|
})
|
|
});
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.connect(serverTransport),
|
|
]);
|
|
|
|
// Call the prompt and verify we get the updated response
|
|
const result = await client.request(
|
|
{
|
|
method: "prompts/get",
|
|
params: {
|
|
name: "test",
|
|
},
|
|
},
|
|
GetPromptResultSchema,
|
|
);
|
|
|
|
expect(result.messages).toHaveLength(1);
|
|
expect(result.messages[0].content.text).toBe("Updated response");
|
|
|
|
// Update happened before transport was connected, so no notifications should be expected
|
|
expect(notifications).toHaveLength(0);
|
|
});
|
|
|
|
test("should update prompt with schema", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const notifications: Notification[] = [];
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
client.fallbackNotificationHandler = async (notification) => {
|
|
notifications.push(notification);
|
|
};
|
|
|
|
// Register initial prompt
|
|
const prompt = mcpServer.prompt(
|
|
"test",
|
|
{
|
|
name: z.string(),
|
|
},
|
|
async ({ name }) => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: `Initial: ${name}`,
|
|
},
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
|
|
// Update the prompt with a different schema
|
|
prompt.update({
|
|
argsSchema: {
|
|
name: z.string(),
|
|
value: z.string(),
|
|
},
|
|
callback: async ({name, value}) => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: `Updated: ${name}, ${value}`,
|
|
},
|
|
},
|
|
],
|
|
})
|
|
});
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.connect(serverTransport),
|
|
]);
|
|
|
|
// Verify the schema was updated
|
|
const listResult = await client.request(
|
|
{
|
|
method: "prompts/list",
|
|
},
|
|
ListPromptsResultSchema,
|
|
);
|
|
|
|
expect(listResult.prompts[0].arguments).toHaveLength(2);
|
|
expect(listResult.prompts[0].arguments?.map(a => a.name).sort()).toEqual(["name", "value"]);
|
|
|
|
// Call the prompt with the new schema
|
|
const getResult = await client.request(
|
|
{
|
|
method: "prompts/get",
|
|
params: {
|
|
name: "test",
|
|
arguments: {
|
|
name: "test",
|
|
value: "value",
|
|
},
|
|
},
|
|
},
|
|
GetPromptResultSchema,
|
|
);
|
|
|
|
expect(getResult.messages).toHaveLength(1);
|
|
expect(getResult.messages[0].content.text).toBe("Updated: test, value");
|
|
|
|
// Update happened before transport was connected, so no notifications should be expected
|
|
expect(notifications).toHaveLength(0);
|
|
});
|
|
|
|
test("should send prompt list changed notification when connected", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const notifications: Notification[] = [];
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
client.fallbackNotificationHandler = async (notification) => {
|
|
notifications.push(notification);
|
|
};
|
|
|
|
// Register initial prompt
|
|
const prompt = mcpServer.prompt("test", async () => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: "Test response",
|
|
},
|
|
},
|
|
],
|
|
}));
|
|
|
|
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.connect(serverTransport),
|
|
]);
|
|
|
|
expect(notifications).toHaveLength(0);
|
|
|
|
// Now update the prompt while connected
|
|
prompt.update({
|
|
callback: async () => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: "Updated response",
|
|
},
|
|
},
|
|
],
|
|
})
|
|
});
|
|
|
|
// Yield event loop to let the notification fly
|
|
await new Promise(process.nextTick);
|
|
|
|
expect(notifications).toMatchObject([
|
|
{ method: "notifications/prompts/list_changed" }
|
|
]);
|
|
});
|
|
|
|
test("should remove prompt and send notification when connected", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const notifications: Notification[] = [];
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
client.fallbackNotificationHandler = async (notification) => {
|
|
notifications.push(notification);
|
|
};
|
|
|
|
// Register initial prompts
|
|
const prompt1 = mcpServer.prompt("prompt1", async () => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: "Prompt 1 response",
|
|
},
|
|
},
|
|
],
|
|
}));
|
|
|
|
mcpServer.prompt("prompt2", async () => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: "Prompt 2 response",
|
|
},
|
|
},
|
|
],
|
|
}));
|
|
|
|
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.connect(serverTransport),
|
|
]);
|
|
|
|
// Verify both prompts are registered
|
|
let result = await client.request(
|
|
{ method: "prompts/list" },
|
|
ListPromptsResultSchema,
|
|
);
|
|
|
|
expect(result.prompts).toHaveLength(2);
|
|
expect(result.prompts.map(p => p.name).sort()).toEqual(["prompt1", "prompt2"]);
|
|
|
|
expect(notifications).toHaveLength(0);
|
|
|
|
// Remove a prompt
|
|
prompt1.remove()
|
|
|
|
// Yield event loop to let the notification fly
|
|
await new Promise(process.nextTick);
|
|
|
|
// Should have sent notification
|
|
expect(notifications).toMatchObject([
|
|
{ method: "notifications/prompts/list_changed" }
|
|
]);
|
|
|
|
// Verify the prompt was removed
|
|
result = await client.request(
|
|
{ method: "prompts/list" },
|
|
ListPromptsResultSchema,
|
|
);
|
|
|
|
expect(result.prompts).toHaveLength(1);
|
|
expect(result.prompts[0].name).toBe("prompt2");
|
|
});
|
|
|
|
test("should register prompt with args schema", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
|
|
mcpServer.prompt(
|
|
"test",
|
|
{
|
|
name: z.string(),
|
|
value: z.string(),
|
|
},
|
|
async ({ name, value }) => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: `${name}: ${value}`,
|
|
},
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
const result = await client.request(
|
|
{
|
|
method: "prompts/list",
|
|
},
|
|
ListPromptsResultSchema,
|
|
);
|
|
|
|
expect(result.prompts).toHaveLength(1);
|
|
expect(result.prompts[0].name).toBe("test");
|
|
expect(result.prompts[0].arguments).toEqual([
|
|
{ name: "name", required: true },
|
|
{ name: "value", required: true },
|
|
]);
|
|
});
|
|
|
|
test("should register prompt with description", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
|
|
mcpServer.prompt("test", "Test description", async () => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: "Test response",
|
|
},
|
|
},
|
|
],
|
|
}));
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
const result = await client.request(
|
|
{
|
|
method: "prompts/list",
|
|
},
|
|
ListPromptsResultSchema,
|
|
);
|
|
|
|
expect(result.prompts).toHaveLength(1);
|
|
expect(result.prompts[0].name).toBe("test");
|
|
expect(result.prompts[0].description).toBe("Test description");
|
|
});
|
|
|
|
test("should validate prompt args", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
const client = new Client(
|
|
{
|
|
name: "test client",
|
|
version: "1.0",
|
|
},
|
|
{
|
|
capabilities: {
|
|
prompts: {},
|
|
},
|
|
},
|
|
);
|
|
|
|
mcpServer.prompt(
|
|
"test",
|
|
{
|
|
name: z.string(),
|
|
value: z.string().min(3),
|
|
},
|
|
async ({ name, value }) => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: `${name}: ${value}`,
|
|
},
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
await expect(
|
|
client.request(
|
|
{
|
|
method: "prompts/get",
|
|
params: {
|
|
name: "test",
|
|
arguments: {
|
|
name: "test",
|
|
value: "ab", // Too short
|
|
},
|
|
},
|
|
},
|
|
GetPromptResultSchema,
|
|
),
|
|
).rejects.toThrow(/Invalid arguments/);
|
|
});
|
|
|
|
test("should prevent duplicate prompt registration", () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
mcpServer.prompt("test", async () => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: "Test response",
|
|
},
|
|
},
|
|
],
|
|
}));
|
|
|
|
expect(() => {
|
|
mcpServer.prompt("test", async () => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: "Test response 2",
|
|
},
|
|
},
|
|
],
|
|
}));
|
|
}).toThrow(/already registered/);
|
|
});
|
|
|
|
test("should allow registering multiple prompts", () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
// This should succeed
|
|
mcpServer.prompt("prompt1", async () => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: "Test response 1",
|
|
},
|
|
},
|
|
],
|
|
}));
|
|
|
|
// This should also succeed and not throw about request handlers
|
|
mcpServer.prompt("prompt2", async () => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: "Test response 2",
|
|
},
|
|
},
|
|
],
|
|
}));
|
|
});
|
|
|
|
test("should allow registering prompts with arguments", () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
// This should succeed
|
|
mcpServer.prompt(
|
|
"echo",
|
|
{ message: z.string() },
|
|
({ message }) => ({
|
|
messages: [{
|
|
role: "user",
|
|
content: {
|
|
type: "text",
|
|
text: `Please process this message: ${message}`
|
|
}
|
|
}]
|
|
})
|
|
);
|
|
});
|
|
|
|
test("should allow registering both resources and prompts with completion handlers", () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
// Register a resource with completion
|
|
mcpServer.resource(
|
|
"test",
|
|
new ResourceTemplate("test://resource/{category}", {
|
|
list: undefined,
|
|
complete: {
|
|
category: () => ["books", "movies", "music"],
|
|
},
|
|
}),
|
|
async () => ({
|
|
contents: [
|
|
{
|
|
uri: "test://resource/test",
|
|
text: "Test content",
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
|
|
// Register a prompt with completion
|
|
mcpServer.prompt(
|
|
"echo",
|
|
{ message: completable(z.string(), () => ["hello", "world"]) },
|
|
({ message }) => ({
|
|
messages: [{
|
|
role: "user",
|
|
content: {
|
|
type: "text",
|
|
text: `Please process this message: ${message}`
|
|
}
|
|
}]
|
|
})
|
|
);
|
|
});
|
|
|
|
test("should throw McpError for invalid prompt name", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
const client = new Client(
|
|
{
|
|
name: "test client",
|
|
version: "1.0",
|
|
},
|
|
{
|
|
capabilities: {
|
|
prompts: {},
|
|
},
|
|
},
|
|
);
|
|
|
|
mcpServer.prompt("test-prompt", async () => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: "Test response",
|
|
},
|
|
},
|
|
],
|
|
}));
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
await expect(
|
|
client.request(
|
|
{
|
|
method: "prompts/get",
|
|
params: {
|
|
name: "nonexistent-prompt",
|
|
},
|
|
},
|
|
GetPromptResultSchema,
|
|
),
|
|
).rejects.toThrow(/Prompt nonexistent-prompt not found/);
|
|
});
|
|
|
|
test("should support completion of prompt arguments", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
const client = new Client(
|
|
{
|
|
name: "test client",
|
|
version: "1.0",
|
|
},
|
|
{
|
|
capabilities: {
|
|
prompts: {},
|
|
},
|
|
},
|
|
);
|
|
|
|
mcpServer.prompt(
|
|
"test-prompt",
|
|
{
|
|
name: completable(z.string(), () => ["Alice", "Bob", "Charlie"]),
|
|
},
|
|
async ({ name }) => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: `Hello ${name}`,
|
|
},
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
const result = await client.request(
|
|
{
|
|
method: "completion/complete",
|
|
params: {
|
|
ref: {
|
|
type: "ref/prompt",
|
|
name: "test-prompt",
|
|
},
|
|
argument: {
|
|
name: "name",
|
|
value: "",
|
|
},
|
|
},
|
|
},
|
|
CompleteResultSchema,
|
|
);
|
|
|
|
expect(result.completion.values).toEqual(["Alice", "Bob", "Charlie"]);
|
|
expect(result.completion.total).toBe(3);
|
|
});
|
|
|
|
test("should support filtered completion of prompt arguments", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
const client = new Client(
|
|
{
|
|
name: "test client",
|
|
version: "1.0",
|
|
},
|
|
{
|
|
capabilities: {
|
|
prompts: {},
|
|
},
|
|
},
|
|
);
|
|
|
|
mcpServer.prompt(
|
|
"test-prompt",
|
|
{
|
|
name: completable(z.string(), (test) =>
|
|
["Alice", "Bob", "Charlie"].filter((value) => value.startsWith(test)),
|
|
),
|
|
},
|
|
async ({ name }) => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: `Hello ${name}`,
|
|
},
|
|
},
|
|
],
|
|
}),
|
|
);
|
|
|
|
const [clientTransport, serverTransport] =
|
|
InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.server.connect(serverTransport),
|
|
]);
|
|
|
|
const result = await client.request(
|
|
{
|
|
method: "completion/complete",
|
|
params: {
|
|
ref: {
|
|
type: "ref/prompt",
|
|
name: "test-prompt",
|
|
},
|
|
argument: {
|
|
name: "name",
|
|
value: "A",
|
|
},
|
|
},
|
|
},
|
|
CompleteResultSchema,
|
|
);
|
|
|
|
expect(result.completion.values).toEqual(["Alice"]);
|
|
expect(result.completion.total).toBe(1);
|
|
});
|
|
});
|
|
|
|
describe("CapabilityEvents", () => {
|
|
test("should emit capability events when registering and interacting with tools", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
const events: Array<CapabilityEvent> = [];
|
|
const subscription = mcpServer.onCapabilityChange((event) => {
|
|
events.push(event);
|
|
});
|
|
|
|
// Register a tool (should trigger "added" event)
|
|
const tool = mcpServer.tool("test-tool", async () => ({
|
|
content: [{ type: "text", text: "Test response" }],
|
|
}));
|
|
|
|
expect(events.length).toBeGreaterThan(0);
|
|
expect(events[0]).toMatchObject({
|
|
serverInfo: { name: "test server", version: "1.0" },
|
|
capabilityType: "tool",
|
|
capabilityName: "test-tool",
|
|
action: "added",
|
|
});
|
|
|
|
// Update the tool (should trigger "updated" event)
|
|
tool.update({
|
|
description: "Updated description",
|
|
});
|
|
|
|
expect(events.some(e =>
|
|
e.capabilityType === "tool" &&
|
|
e.capabilityName === "test-tool" &&
|
|
e.action === "updated"
|
|
)).toBe(true);
|
|
|
|
// Disable the tool (should trigger "disabled" event)
|
|
tool.disable();
|
|
|
|
expect(events.some(e =>
|
|
e.capabilityType === "tool" &&
|
|
e.capabilityName === "test-tool" &&
|
|
e.action === "disabled"
|
|
)).toBe(true);
|
|
|
|
// Enable the tool (should trigger "enabled" event)
|
|
tool.enable();
|
|
|
|
expect(events.some(e =>
|
|
e.capabilityType === "tool" &&
|
|
e.capabilityName === "test-tool" &&
|
|
e.action === "enabled"
|
|
)).toBe(true);
|
|
|
|
// Clean up
|
|
subscription.close();
|
|
});
|
|
|
|
test("should emit capability events when tools are invoked", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
|
|
const events: Array<CapabilityEvent> = [];
|
|
const subscription = mcpServer.onCapabilityChange((event) => {
|
|
events.push(event);
|
|
});
|
|
|
|
mcpServer.tool("test-tool", async () => ({
|
|
content: [{ type: "text", text: "Test response" }],
|
|
}));
|
|
|
|
// Clear events from registration
|
|
events.length = 0;
|
|
|
|
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.connect(serverTransport),
|
|
]);
|
|
|
|
await client.request(
|
|
{
|
|
method: "tools/call",
|
|
params: {
|
|
name: "test-tool",
|
|
},
|
|
},
|
|
CallToolResultSchema,
|
|
);
|
|
|
|
// Should have "invoked" and "completed" events
|
|
expect(events.some(e =>
|
|
e.capabilityType === "tool" &&
|
|
e.capabilityName === "test-tool" &&
|
|
e.action === "invoked"
|
|
)).toBe(true);
|
|
|
|
expect(events.some(e =>
|
|
e.capabilityType === "tool" &&
|
|
e.capabilityName === "test-tool" &&
|
|
e.action === "completed"
|
|
)).toBe(true);
|
|
|
|
// The invoked and completed events should have the same invocationIndex
|
|
const invokedEvent = events.find(e => e.action === "invoked");
|
|
const completedEvent = events.find(e => e.action === "completed");
|
|
expect(invokedEvent?.invocationIndex).toBe(completedEvent?.invocationIndex);
|
|
|
|
subscription.close();
|
|
});
|
|
|
|
test("should emit capability events for resources", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
|
|
const events: Array<CapabilityEvent> = [];
|
|
const subscription = mcpServer.onCapabilityChange((event) => {
|
|
events.push(event);
|
|
});
|
|
|
|
// Register a resource
|
|
const resource = mcpServer.resource("test-resource", "test://resource", async () => ({
|
|
contents: [{ uri: "test://resource", text: "Test content" }],
|
|
}));
|
|
|
|
expect(events.some(e =>
|
|
e.capabilityType === "resource" &&
|
|
e.capabilityName === "test-resource" &&
|
|
e.action === "added"
|
|
)).toBe(true);
|
|
|
|
// Clear events from registration
|
|
events.length = 0;
|
|
|
|
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.connect(serverTransport),
|
|
]);
|
|
|
|
// Read the resource
|
|
await client.request(
|
|
{
|
|
method: "resources/read",
|
|
params: {
|
|
uri: "test://resource",
|
|
},
|
|
},
|
|
ReadResourceResultSchema,
|
|
);
|
|
|
|
// Should have "invoked" event
|
|
expect(events.some(e =>
|
|
e.capabilityType === "resource" &&
|
|
e.capabilityName === "test://resource" &&
|
|
e.action === "invoked"
|
|
)).toBe(true);
|
|
|
|
// Clear events
|
|
events.length = 0;
|
|
|
|
// Remove the resource
|
|
resource.remove();
|
|
|
|
// Should have "removed" event
|
|
expect(events.some(e =>
|
|
e.capabilityType === "resource" &&
|
|
e.capabilityName === "test-resource" &&
|
|
e.action === "removed"
|
|
)).toBe(true);
|
|
|
|
subscription.close();
|
|
});
|
|
|
|
test("should emit capability events for prompts", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
|
|
const events: Array<CapabilityEvent> = [];
|
|
const subscription = mcpServer.onCapabilityChange((event) => {
|
|
events.push(event);
|
|
});
|
|
|
|
// Register a prompt
|
|
mcpServer.prompt("test-prompt", async () => ({
|
|
messages: [
|
|
{
|
|
role: "assistant",
|
|
content: {
|
|
type: "text",
|
|
text: "Test response",
|
|
},
|
|
},
|
|
],
|
|
}));
|
|
|
|
expect(events.some(e =>
|
|
e.capabilityType === "prompt" &&
|
|
e.capabilityName === "test-prompt" &&
|
|
e.action === "added"
|
|
)).toBe(true);
|
|
|
|
// Clear events from registration
|
|
events.length = 0;
|
|
|
|
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.connect(serverTransport),
|
|
]);
|
|
|
|
// Get the prompt
|
|
await client.request(
|
|
{
|
|
method: "prompts/get",
|
|
params: {
|
|
name: "test-prompt",
|
|
},
|
|
},
|
|
GetPromptResultSchema,
|
|
);
|
|
|
|
// Should have "invoked" and "completed" events
|
|
expect(events.some(e =>
|
|
e.capabilityType === "prompt" &&
|
|
e.capabilityName === "test-prompt" &&
|
|
e.action === "invoked"
|
|
)).toBe(true);
|
|
|
|
expect(events.some(e =>
|
|
e.capabilityType === "prompt" &&
|
|
e.capabilityName === "test-prompt" &&
|
|
e.action === "completed"
|
|
)).toBe(true);
|
|
|
|
subscription.close();
|
|
});
|
|
|
|
test("should emit error events when tool execution fails", async () => {
|
|
const mcpServer = new McpServer({
|
|
name: "test server",
|
|
version: "1.0",
|
|
});
|
|
|
|
const client = new Client({
|
|
name: "test client",
|
|
version: "1.0",
|
|
});
|
|
|
|
const events: Array<CapabilityEvent> = [];
|
|
const subscription = mcpServer.onCapabilityChange((event) => {
|
|
// Only capture error events
|
|
if (event.action === "error") {
|
|
events.push(event);
|
|
}
|
|
});
|
|
|
|
mcpServer.tool("error-tool", async () => {
|
|
throw new Error("Simulated error");
|
|
});
|
|
|
|
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
|
|
|
|
await Promise.all([
|
|
client.connect(clientTransport),
|
|
mcpServer.connect(serverTransport),
|
|
]);
|
|
|
|
// Call the tool that throws an error
|
|
await client.request(
|
|
{
|
|
method: "tools/call",
|
|
params: {
|
|
name: "error-tool",
|
|
},
|
|
},
|
|
CallToolResultSchema,
|
|
);
|
|
|
|
// Should have error event
|
|
expect(events.length).toBe(1);
|
|
expect(events[0]).toMatchObject({
|
|
capabilityType: "tool",
|
|
capabilityName: "error-tool",
|
|
action: "error",
|
|
});
|
|
|
|
// Type assert to the specific variant of CapabilityEvent that has the error property
|
|
const errorEvent = events[0] as Extract<CapabilityEvent, { action: "error" }>;
|
|
expect(errorEvent.error).toBeDefined();
|
|
|
|
subscription.close();
|
|
});
|
|
});
|