IBM i MCP Server

/** * @fileoverview Tests for the registration of the get_random_cat_fact tool. * @module tests/mcp-server/tools/catFactFetcher/registration.test */ import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js"; import { beforeEach, describe, expect, it, vi, type Mock } from "vitest"; import * as logic from "../../../../src/mcp-server/tools/catFactFetcher/logic"; import { registerCatFactFetcherTool } from "../../../../src/mcp-server/tools/catFactFetcher/registration"; // Mock the logic module vi.mock("../../../../src/mcp-server/tools/catFactFetcher/logic"); describe("registerCatFactFetcherTool", () => { const mockMcpServer = { registerTool: vi.fn(), } as unknown as McpServer; beforeEach(() => { vi.clearAllMocks(); }); it("should call server.registerTool with the correct parameters", async () => { await registerCatFactFetcherTool(mockMcpServer); expect(mockMcpServer.registerTool).toHaveBeenCalledOnce(); const [name, metadata, handler] = (mockMcpServer.registerTool as Mock).mock .calls[0]; expect(name).toBe("get_random_cat_fact"); expect(metadata.title).toBe("Get Random Cat Fact"); expect(typeof handler).toBe("function"); }); it("handler should correctly format a successful response", async () => { const mockLogicResponse = { fact: "Cats are awesome", length: 17, timestamp: new Date().toISOString(), }; vi.spyOn(logic, "catFactFetcherLogic").mockResolvedValue(mockLogicResponse); await registerCatFactFetcherTool(mockMcpServer); const handler = (mockMcpServer.registerTool as Mock).mock.calls[0][2]; const result = await handler({ maxLength: 140 }); expect(result.isError).toBeFalsy(); expect(result.structuredContent).toEqual(mockLogicResponse); expect(result.content[0].text).toContain("Cats are awesome"); }); });