如何验证来自 user1 的消息对 user2 可见？

如何解决如何验证来自 user1 的消息对 user2 可见？

我正在学习自动化并且正在使用 webdriverIO 框架。我正在使用 https://demos.mqtt.cool/chat/ 网站进行培训，实际上我不知道如何验证用户 2 是否收到了来自用户 1 的消息，也许有人可以建议如何操作？

步骤文件

import { step } from 'mocha-steps'
import DemosPage from '../pageobjects/demosMqtt.page'

import { generateNickName,generaterandomMessage} from '../utils/randomGenerate'
const nickNameForUser1 = generateNickName()
const nickNameForUser2 = generateNickName()

const randomMessageFromUser1 = generaterandomMessage()


const user1 = {
    chatpage: new DemosPage('user1')
}

const user2 = {
    chatpage: new DemosPage('user2')
}

describe('Test 1',() => {


step(`Users should open a page and wait until message  connected to server appears`,function () {
        user1.chatpage.open()
        user2.chatpage.open()
        user1.chatpage.successMessage.waitFordisplayed({ timeout: 2000 })
        user2.chatpage.successMessage.waitFordisplayed({ timeout: 2000 })

    })

    step('Users enter a unique name in input field',function () {


        user1.chatpage.nicknameInputField.setValue(nickNameForUser1.firstName)
        user2.chatpage.nicknameInputField.setValue(nickNameForUser2.firstName)

    })

    step('Users click on connect button and wait until message connected to broker appears',function () {
        user1.chatpage.connectButton.click()
        user2.chatpage.connectButton.click()

        user1.chatpage.connectMsgbroker.waitFordisplayed()
        user2.chatpage.connectMsgbroker.waitFordisplayed()
    })

    step('User 1 sends some unique randomly generated message',function () {
        user1.chatpage.writeMessageField.setValue(randomMessageFromUser1.randomMessage)
        user1.chatpage.replyButton.click()
    })

    step('User 2 receives the message and sends the same message back with something added to it',function () {
       
    })

ChatPage(DemosPage) 文件

class DemosPage extends Page {
    get successMessage() { return this.browser.$('.text-success') }
    get connectButton() { return this.browser.$('#connectBtn') }
    get nicknameInputField() { return this.browser.$('#user') }
    get connectMsgbroker() { return this.browser.$(`//div[contains(text(),'Connected to the MQTT broker')]`) }

    get usersList() { return this.browser.$('#usersList') }
    get writeMessageField() {return this.browser.$('#sendMessage')}
    get replyButton() { return this.browser.$('#replyBtn') }
    get disconnectButton() { return this.browser.$('#disconnectBtn') }

    open() {
        this.browser.url('https://demos.mqtt.cool/chat/')
    }

}

export default DemosPage

我知道它与 .isdisplayed 函数或相关的东西有关，但我不知道如何验证它...