caldav-mcp

import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import type { CalDAVClient } from "ts-caldav";
import { describe, expect, test, vi } from "vitest";
import { registerListEvents } from "./list-events.js";

type ToolHandler = (params: {
	calendarUrl: string;
	start: string;
	end: string;
}) => Promise<{ content: { type: string; text: string }[] }>;

describe("registerListEvents", () => {
	test("returns uid field for each event", async () => {
		// Create mock CalDAV client
		const mockClient = {
			getEvents: vi.fn().mockResolvedValue([
				{
					uid: "event-123",
					summary: "Test Event",
					start: new Date("2025-10-13T10:00:00Z"),
					end: new Date("2025-10-13T11:00:00Z"),
				},
				{
					uid: "event-456",
					summary: "Another Event",
					start: new Date("2025-10-14T14:00:00Z"),
					end: new Date("2025-10-14T15:00:00Z"),
				},
			]),
		};

		// Create mock MCP server with spied tool method
		let toolHandler: ToolHandler | null = null;
		const server = new McpServer({
			name: "test-server",
			version: "0.1.0",
		});

		// Spy on the tool registration to capture the handler
		const originalRegisterTool = server.registerTool.bind(server);
		server.registerTool = vi.fn(
			(name: string, config: unknown, handler: ToolHandler) => {
				if (name === "list-events") {
					toolHandler = handler;
				}
				return originalRegisterTool(name, config, handler);
			},
		) as typeof server.registerTool;

		// Register the tool
		registerListEvents(mockClient as CalDAVClient, server);

		// Verify handler was captured
		expect(toolHandler).toBeDefined();

		// Call the tool handler
		const result = await toolHandler({
			calendarUrl: "/test/calendar/",
			start: "2025-10-01T00:00:00Z",
			end: "2025-10-31T23:59:59Z",
		});

		// Parse the response
		const events = JSON.parse(result.content[0].text);

		// Verify uid is included in each event
		expect(events).toHaveLength(2);
		expect(events[0]).toHaveProperty("uid", "event-123");
		expect(events[0]).toHaveProperty("summary", "Test Event");
		expect(events[1]).toHaveProperty("uid", "event-456");
		expect(events[1]).toHaveProperty("summary", "Another Event");
	});
});