Question

使用Mocha，Jsdom，酶和Expect断言。

canPlayType总是返回一个空字符串，因为我没有在浏览器中运行测试。处理这个问题的最佳方法是什么？我是否嘲笑它，如果是这样，我该如何嘲笑它？

spec文件：

it('should be able to play media',() => {
    expect(canPlayMedia()).toBe(true);
});

js file：

const canPlayMedia = () => {
    const mediaElement = document.createElement('audio');
    // canPlayType is always empty string
    const canPlay = mediaElement.canPlayType('audio/mpeg');

    return canPlay;
}

jsdom文件：

// setup the simplest document possible
const doc = jsdom.jsdom('<!doctype html><html><body></body></html>');

// get the window object out of the document
const win = doc.defaultView;

// set globals for mocha that make access to document and window feel
// natural in the test environment
global.document = doc;
global.window = win;

// from mocha-jsdom https://github.com/rstacruz/mocha-jsdom/blob/master/index.js#L80
const propagateToGlobal = (window) => {
  Object.keys(window).forEach((key) => {
    if (Object.prototype.hasOwnProperty.call(window, key) && !(key in global)) {
      global[key] = window[key];
    }
  });
};

global.document.webkitExitFullscreen = () => null;

// take all properties of the window object and also attach it to the
// mocha global object
propagateToGlobal(win);

Answer 1

func textFieldShouldEndEditing(_ textField: UITextField) -> Bool
{
    // assuming you take the same action for all TextFields
    // assume geoFenceHasBeenTriggered is a class-variable true / false
    return !geoFenceHasBeenTriggered
}

Mocha Mocking Js实例函数

1 个答案: