memegoat/backend/src/realtime/events.gateway.spec.ts

import { ConfigService } from "@nestjs/config";
import { Test, TestingModule } from "@nestjs/testing";
import { JwtService } from "../crypto/services/jwt.service";
import { UsersService } from "../users/users.service";
import { EventsGateway } from "./events.gateway";

describe("EventsGateway", () => {
	let gateway: EventsGateway;
	let _jwtService: JwtService;

	const mockJwtService = {
		verifyJwt: jest.fn(),
	};

	const mockConfigService = {
		get: jest.fn().mockReturnValue("secret-password-32-chars-long-!!!"),
	};

	const mockUsersService = {
		findOne: jest.fn(),
	};

	beforeEach(async () => {
		const module: TestingModule = await Test.createTestingModule({
			providers: [
				EventsGateway,
				{ provide: JwtService, useValue: mockJwtService },
				{ provide: ConfigService, useValue: mockConfigService },
				{ provide: UsersService, useValue: mockUsersService },
			],
		}).compile();

		gateway = module.get<EventsGateway>(EventsGateway);
		_jwtService = module.get<JwtService>(JwtService);
		gateway.server = {
			to: jest.fn().mockReturnThis(),
			emit: jest.fn(),
		} as any;
	});

	it("should be defined", () => {
		expect(gateway).toBeDefined();
	});

	describe("sendToUser", () => {
		it("should emit event to user room", () => {
			const userId = "user123";
			const event = "test_event";
			const data = { foo: "bar" };

			gateway.sendToUser(userId, event, data);

			expect(gateway.server.to).toHaveBeenCalledWith(`user:${userId}`);
			expect(gateway.server.to(`user:${userId}`).emit).toHaveBeenCalledWith(
				event,
				data,
			);
		});
	});
});