mcp-youtube

import { GetVideoCommentsTool } from "../getVideoComments"; import type { YoutubeService } from "../../../services/youtube.service"; import { IServiceContainer } from "../../../container"; jest.mock("../../../services/youtube.service"); describe("GetVideoCommentsTool", () => { let mockYoutubeService: jest.Mocked<YoutubeService>; let tool: GetVideoCommentsTool; beforeEach(() => { mockYoutubeService = { getVideoComments: jest.fn(), } as unknown as jest.Mocked<YoutubeService>; const container = { youtubeService: mockYoutubeService, } as unknown as IServiceContainer; tool = new GetVideoCommentsTool(container); jest.clearAllMocks(); }); it("should be defined", () => { expect(tool).toBeDefined(); expect(tool.name).toBe("getVideoComments"); }); it("should return a successful result with the correct content", async () => { const mockComments = [{ text: "Great video!" }]; mockYoutubeService.getVideoComments.mockResolvedValue(mockComments as any); const params = { videoId: "1" }; const result = await tool.execute(params); expect(result.success).toBe(true); if (!result.success || !result.content) throw new Error("Test failed: success true but no content"); const returnedData = JSON.parse(result.content[0].text as string); expect(returnedData).toEqual(mockComments); }); it("should return an error if youtubeService.getVideoComments throws an error", async () => { mockYoutubeService.getVideoComments.mockRejectedValue( new Error("Comments are disabled") ); const params = { videoId: "1" }; const result = await tool.execute(params); expect(result.isError).toBe(true); expect(result.content[0].text).toContain("Comments are disabled"); }); it("should return a Zod validation error for invalid parameters", async () => { const invalidParams = { videoId: "" }; // videoId cannot be empty const result = await tool.execute(invalidParams); expect(result.isError).toBe(true); expect(result.content[0].text).toContain( "Too small: expected string to have >=1 characters" ); }); });