riot-web/test/createRoom-test.js

import {_waitForMember} from '../src/createRoom';
import {EventEmitter} from 'events';

/* Shorter timeout, we've got tests to run */
const timeout = 30;

describe("waitForMember", () => {
    let client;

    beforeEach(() => {
        client = new EventEmitter();
    });

    it("resolves with false if the timeout is reached", (done) => {
        _waitForMember(client, "", "", { timeout: 0 }).then((r) => {
            expect(r).toBe(false);
            done();
        });
    });

    it("resolves with false if the timeout is reached, even if other RoomState.newMember events fire", (done) => {
        const roomId = "!roomId:domain";
        const userId = "@clientId:domain";
        _waitForMember(client, roomId, userId, { timeout }).then((r) => {
            expect(r).toBe(false);
            done();
        });
        client.emit("RoomState.newMember", undefined, undefined, { roomId, userId: "@anotherClient:domain" });
    });

    it("resolves with true if RoomState.newMember fires", (done) => {
        const roomId = "!roomId:domain";
        const userId = "@clientId:domain";
        _waitForMember(client, roomId, userId, { timeout }).then((r) => {
            expect(r).toBe(true);
            expect(client.listeners("RoomState.newMember").length).toBe(0);
            done();
        });
        client.emit("RoomState.newMember", undefined, undefined, { roomId, userId });
    });
});