首页 > 解决方案 > 如何在基于 Chromium 的功能测试中使用导航媒体设备?(TestCafe)

问题描述

TL;DR如何运行使用navigator.mediaDevicesTestCafe 和 Chromium 及其方法的功能测试?

我正在尝试使用 TestCafe 编写功能测试来测试一些 WebRTC 代码。我正在使用反应。我有一个枚举设备的自定义钩子:

function useUpdateDeviceList() {
  const dispatch = useDispatch();

  useEffect(() => {
    async function updateDeviceList() {
      const { audioInputs, videoInputs } = await getInputDeviceInfos();

      dispatch(setAudioInputs(audioInputs));
      dispatch(setVideoInputs(videoInputs));
    }

    updateDeviceList();

    console.log('navigator', navigator);

    navigator.mediaDevices.ondevicechange = updateDeviceList;

    return () => {
      navigator.mediaDevices.ondevicechange = null;
    };
  }, [dispatch]);
}

在哪里getInputDeviceInfos调用navigator.mediaDevices.enumerateDevices

当我在浏览器中运行此代码时,它可以完美运行。当它在 TestCafe 的功能测试中运行时,它会抛出异常。

TypeError: Cannot set property 'ondevicechange' of undefined

彻底的谷歌搜索只给出了添加标志--use-fake-ui-for-media-stream--use-fake-device-for-media-stream启动命令的答案(前者避免了授予相机/麦克风权限的需要,并且梯子getUserMedia()根据文档提供测试模式而不是实时相机输入),其中我做了:

"functional-tests:chrome-desktop":"testcafe 'chrome --use-fake-ui-for-media-stream --use-fake-device-for-media-stream' src/**/*.functional-test.js --app 'yarn dev' --app-init-delay 2000",

仍然发生相同的错误。console.log上面钩子中的 显示了一个navigator没有mediaDevices.

Navigator {vendorSub: "", productSub: "20030107", vendor: "Google Inc.", maxTouchPoints: 0, sendBeacon: ƒ, …}
appCodeName: "Mozilla"
appName: "Netscape"
appVersion: "5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36"
connection: NetworkInformation {onchange: null, effectiveType: "4g", rtt: 100, downlink: 1.55, saveData: false}
cookieEnabled: true
doNotTrack: null
geolocation: Geolocation {}
hardwareConcurrency: 16
language: "en-GB"
languages: (3) ["en-GB", "en-US", "en"]
maxTouchPoints: 0
mediaCapabilities: MediaCapabilities {}
mediaSession: MediaSession {metadata: null, playbackState: "none"}
mimeTypes: MimeTypeArray {0: MimeType, 1: MimeType, application/x-nacl: MimeType, application/x-pnacl: MimeType, length: 2}
onLine: true
permissions: Permissions {}
platform: "MacIntel"
plugins: PluginArray {0: Plugin, Native Client: Plugin, length: 1}
product: "Gecko"
productSub: "20030107"
sendBeacon: ƒ ()
userActivation: UserActivation {hasBeenActive: false, isActive: false}
userAgent: "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36"
vendor: "Google Inc."
vendorSub: ""
webkitPersistentStorage: DeprecatedStorageQuota {}
webkitTemporaryStorage: DeprecatedStorageQuota {}
__proto__: Navigator

我必须做些什么才能让这些测试通过?

PS:如果重要的话,这是应该通过的简单测试:

import { Selector } from 'testcafe';

const {
  FUNCTIONAL_TESTS_MEETINGS_APP_PROTOCOL: protocol = 'http',
  FUNCTIONAL_TESTS_MEETINGS_APP_HOST: host = 'localhost',
  FUNCTIONAL_TESTS_MEETINGS_APP_PORT: port = 3000,
  FUNCTIONAL_TESTS_MEETINGS_APP_MEETING_ID: meetingId = '327fa7b0-0605-4595-b066-819f201ce593',
} = process.env;

fixture`Meetings page`.page(`${protocol}://${host}:${port}/${meetingId}`);

test.only('page should load and display the correct title', async t => {
  await t.debug();
  const actual = Selector('title').innerText;
  const expected = `Meetings - ${meetingId}`;

  await t.expect(actual).eql(expected);
});

标签: webrtcchromiumfunctional-testingtestcafemediadevices

解决方案


Chrome 不允许getUserMedia从不安全的来源调用 API。因此,您可以使用以下任一方式:

  1. 通过添加以下选项将“localhost”指定为主机名:-- hostname
testcafe --hostname localhost ...
  1. 通过添加此选项使用 SSL 证书:-- ssl
testcafe --ssl pfx=/path/to/cert.pfx ...

有关更多信息,请参阅以下示例:模拟摄像头/麦克风访问


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