我正在mocha / chai / NodeJs中设置一些单元测试。而且我正在测试在获取API调用中返回的response。
我的回复中有9个对象。我想检查一下，每个对象是否包含一个名为“ largeImageURL ”的属性。但是，正在努力做到这一点的最佳方法。
到目前为止，我已经在我的对象上使用.map来进行黑客攻击，该对象正在寻找largeImageURL，并返回每个值。并检查其中9个是否存在。
这有效并返回：
[ { largeImageURL: 'https://pixabay.com/get/55e3d3444a5ab108f5d084609621317b133fd8e04e50744e762c79d2904fc1_1280.jpg' },
{ largeImageURL: 'https://pixabay.com/get/55e3d3474d57b108f5d084609621317b133fd8e04e50744e762c79d2904fc1_1280.jpg' },
{ largeImageURL: 'https://pixabay.com/get/50e6dd454b54b108f5d084609621317b133fd8e04e50744e762c79d2904fc1_1280.jpg' },
{ largeImageURL: 'https://pixabay.com/get/54e6dc4a4f50ac14f6da8c7dda793e781039dee3564c704c722c78d6914ac75c_1280.jpg' },
{ largeImageURL: 'https://pixabay.com/get/57e7d244435aaa14f6da8c7dda793e781039dee3564c704c722c78d6914ac75c_1280.jpg' },
{ largeImageURL: 'https://pixabay.com/get/53e6dc434351b108f5d084609621317b133fd8e04e50744e762c79d2904fc1_1280.jpg' },
{ largeImageURL: 'https://pixabay.com/get/52e0d2444a51b108f5d084609621317b133fd8e04e50744e762c79d2904fc1_1280.jpg' },
{ largeImageURL: 'https://pixabay.com/get/57e8d0404f57ae14f6da8c7dda793e781039dee3564c704c722c78d6914ac75c_1280.jpg' },
{ largeImageURL: 'https://pixabay.com/get/57e8d0434b50a514f6da8c7dda793e781039dee3564c704c722c78d6914ac75c_1280.jpg' } ]
但是我实际上想做这样的事情：
expect(res.hits).to.have.key(largeImageURL);
但是我无法让expect以此方式工作。这可能吗？
这是我到目前为止写的，通过了：
describe('1) Check for succcessful fetech API call', () => {
it('a) Should return an object, with an array count of 9 elements', async () => {
await fetch('https://pixabay.com/api/?key=MY_API_KEY&q=manhattan&image_type=photo&page=1&per_page=9')
.then((res) => {
return res.json()
})
.then((res) => {
console.log(res.hits);
expect(res).to.be.an('object');
expect(res.hits).to.have.lengthOf(9);
const imageURLs = res.hits.map(x => ({largeImageURL: x.largeImageURL}));
expect(imageURLs).to.have.lengthOf(9);
})
})
}）
Console.log通过这种方式生成此文件。任何想法将不胜感激！
1) Check for succcessful fetech API call
[ { largeImageURL: 'https://pixabay.com/get/55e3d3444a5ab108f5d084609621317b133fd8e04e50744e762c79d2904fc1_1280.jpg',
webformatHeight: 360,
webformatWidth: 640,
likes: 646,
imageWidth: 2560,
id: 336708,
user_id: 242387,
views: 302373,
comments: 141,
pageURL: 'https://pixabay.com/photos/manhattan-empire-state-building-336708/',
imageHeight: 1440,
webformatURL: 'https://pixabay.com/get/55e3d3444a5ab108f5d084609621317b133fd8e04e50744e762c79d2904fc1_640.jpg',
type: 'photo',
previewHeight: 84,
tags: 'manhattan, empire state building, new york city',
downloads: 141972,
user: 'Free-Photos',
favorites: 775,
imageSize: 1587009,
previewWidth: 150,
userImageURL: 'https://cdn.pixabay.com/user/2014/05/07/00-10-34-2_250x250.jpg',
previewURL: 'https://cdn.pixabay.com/photo/2014/05/03/01/04/manhattan-336708_150.jpg' },
{ largeImageURL: 'https://pixabay.com/get/55e3d3474d57b108f5d084609621317b133fd8e04e50744e762c79d2904fc1_1280.jpg',
webformatHeight: 426,
webformatWidth: 640,
likes: 775,
imageWidth: 3000,
id: 336475,
user_id: 242387,
views: 266538,
comments: 110,
pageURL: 'https://pixabay.com/photos/new-york-city-brooklyn-bridge-night-336475/',
imageHeight: 2000,
webformatURL: 'https://pixabay.com/get/55e3d3474d57b108f5d084609621317b133fd8e04e50744e762c79d2904fc1_640.jpg',
type: 'photo',
previewHeight: 99,
tags: 'new york city, brooklyn bridge, night',
downloads: 110902,
user: 'Free-Photos',
favorites: 724,
imageSize: 1230835,
previewWidth: 150,
userImageURL: 'https://cdn.pixabay.com/user/2014/05/07/00-10-34-2_250x250.jpg',
previewURL: 'https://cdn.pixabay.com/photo/2014/05/02/23/46/new-york-city-336475_150.jpg' },
{ largeImageURL: 'https://pixabay.com/get/50e6dd454b54b108f5d084609621317b133fd8e04e50744e762c79d2904fc1_1280.jpg',
webformatHeight: 426,
webformatWidth: 640,
likes: 443,
imageWidth: 5184,
id: 668616,
user_id: 777390,
views: 241940,
comments: 72,
pageURL: 'https://pixabay.com/photos/new-york-skyline-new-york-city-city-668616/',
imageHeight: 3456,
webformatURL: 'https://pixabay.com/get/50e6dd454b54b108f5d084609621317b133fd8e04e50744e762c79d2904fc1_640.jpg',
type: 'photo',
previewHeight: 99,
tags: 'new york, skyline, new york city',
downloads: 84616,
user: 'mpewny',
favorites: 439,
imageSize: 8661087,
previewWidth: 150,
userImageURL: 'https://cdn.pixabay.com/user/2018/02/04/18-35-12-410_250x250.jpg',
previewURL: 'https://cdn.pixabay.com/photo/2015/03/11/12/31/new-york-668616_150.jpg' },
{ largeImageURL: 'https://pixabay.com/get/54e6dc4a4f50ac14f6da8c7dda793e781039dee3564c704c722c78d6914ac75c_1280.jpg',
webformatHeight: 426,
webformatWidth: 640,
likes: 351,
imageWidth: 8256,
id: 2699520,
user_id: 4591426,
views: 109012,
comments: 35,
pageURL: 'https://pixabay.com/photos/new-york-cityscape-night-city-2699520/',
imageHeight: 5504,
webformatURL: 'https://pixabay.com/get/54e6dc4a4f50ac14f6da8c7dda793e781039dee3564c704c722c78d6914ac75c_640.jpg',
type: 'photo',
previewHeight: 99,
tags: 'new york, cityscape, night',
downloads: 54675,
user: 'igormattio',
favorites: 332,
imageSize: 11053173,
previewWidth: 150,
userImageURL: '',
previewURL: 'https://cdn.pixabay.com/photo/2017/08/31/05/36/new-york-2699520_150.jpg' },
{ largeImageURL: 'https://pixabay.com/get/57e7d244435aaa14f6da8c7dda793e781039dee3564c704c722c78d6914ac75c_1280.jpg',
webformatHeight: 426,
webformatWidth: 640,
likes: 316,
imageWidth: 4867,
id: 1777986,
user_id: 3628174,
views: 80039,
comments: 34,
pageURL: 'https://pixabay.com/photos/usa-manhattan-contrasts-new-york-1777986/',
imageHeight: 3246,
webformatURL: 'https://pixabay.com/get/57e7d244435aaa14f6da8c7dda793e781039dee3564c704c722c78d6914ac75c_640.jpg',
type: 'photo',
previewHeight: 99,
tags: 'usa, manhattan, contrasts',
downloads: 42274,
user: 'wiggijo',
favorites: 384,
imageSize: 5819085,
previewWidth: 150,
userImageURL: 'https://cdn.pixabay.com/user/2016/10/28/09-04-12-659_250x250.jpeg',
previewURL: 'https://cdn.pixabay.com/photo/2016/10/28/13/09/usa-1777986_150.jpg' },
{ largeImageURL: 'https://pixabay.com/get/53e6dc434351b108f5d084609621317b133fd8e04e50744e762c79d2904fc1_1280.jpg',
webformatHeight: 640,
webformatWidth: 640,
likes: 255,
imageWidth: 2048,
id: 569093,
user_id: 364018,
views: 98250,
comments: 28,
pageURL: 'https://pixabay.com/photos/city-manhattan-sunset-town-569093/',
imageHeight: 2048,
webformatURL: 'https://pixabay.com/get/53e6dc434351b108f5d084609621317b133fd8e04e50744e762c79d2904fc1_640.jpg',
type: 'photo',
previewHeight: 150,
tags: 'city, manhattan, sunset',
downloads: 55895,
user: 'Life-Of-Pix',
favorites: 370,
imageSize: 698912,
previewWidth: 150,
userImageURL: 'https://cdn.pixabay.com/user/2014/08/21/23-01-42-554_250x250.jpg',
previewURL: 'https://cdn.pixabay.com/photo/2014/12/15/13/57/city-569093_150.jpg' },
{ largeImageURL: 'https://pixabay.com/get/52e0d2444a51b108f5d084609621317b133fd8e04e50744e762c79d2904fc1_1280.jpg',
webformatHeight: 301,
webformatWidth: 640,
likes: 263,
imageWidth: 5183,
id: 407703,
user_id: 242387,
views: 100552,
comments: 64,
pageURL: 'https://pixabay.com/photos/manhattan-new-york-city-407703/',
imageHeight: 2444,
webformatURL: 'https://pixabay.com/get/52e0d2444a51b108f5d084609621317b133fd8e04e50744e762c79d2904fc1_640.jpg',
type: 'photo',
previewHeight: 70,
tags: 'manhattan, new york city, empire state building',
downloads: 55127,
user: 'Free-Photos',
favorites: 375,
imageSize: 3543546,
previewWidth: 150,
userImageURL: 'https://cdn.pixabay.com/user/2014/05/07/00-10-34-2_250x250.jpg',
previewURL: 'https://cdn.pixabay.com/photo/2014/08/01/15/51/manhattan-407703_150.jpg' },
{ largeImageURL: 'https://pixabay.com/get/57e8d0404f57ae14f6da8c7dda793e781039dee3564c704c722c78d6914ac75c_1280.jpg',
webformatHeight: 425,
webformatWidth: 640,
likes: 204,
imageWidth: 4201,
id: 1853552,
user_id: 2286921,
views: 64835,
comments: 8,
pageURL: 'https://pixabay.com/photos/architecture-new-york-city-manhattan-1853552/',
imageHeight: 2790,
webformatURL: 'https://pixabay.com/get/57e8d0404f57ae14f6da8c7dda793e781039dee3564c704c722c78d6914ac75c_640.jpg',
type: 'photo',
previewHeight: 99,
tags: 'architecture, new york city, manhattan',
downloads: 36684,
user: 'Pexels',
favorites: 279,
imageSize: 3935888,
previewWidth: 150,
userImageURL: 'https://cdn.pixabay.com/user/2016/03/26/22-06-36-459_250x250.jpg',
previewURL: 'https://cdn.pixabay.com/photo/2016/11/23/15/32/architecture-1853552_150.jpg' },
{ largeImageURL: 'https://pixabay.com/get/57e8d0434b50a514f6da8c7dda793e781039dee3564c704c722c78d6914ac75c_1280.jpg',
webformatHeight: 360,
webformatWidth: 640,
likes: 145,
imageWidth: 5000,
id: 1850129,
user_id: 2286921,
views: 59983,
comments: 7,
pageURL: 'https://pixabay.com/photos/architecture-new-york-city-manhattan-1850129/',
imageHeight: 2813,
webformatURL: 'https://pixabay.com/get/57e8d0434b50a514f6da8c7dda793e781039dee3564c704c722c78d6914ac75c_640.jpg',
type: 'photo',
previewHeight: 84,
tags: 'architecture, new york city, manhattan',
downloads: 34065,
user: 'Pexels',
favorites: 258,
imageSize: 3275708,
previewWidth: 150,
userImageURL: 'https://cdn.pixabay.com/user/2016/03/26/22-06-36-459_250x250.jpg',
previewURL: 'https://cdn.pixabay.com/photo/2016/11/22/19/17/architecture-1850129_150.jpg' } ]
✓ a) Should return an object, with an array count of 9 elements (196ms)
答案 0 :(得分：0)
您可以使用插件chai-each
在下面的代码段中，我包含chaiEach作为浏览器功能
chai.use(chaiEach);
expect = chai.expect;
test = function(testName, expected) {
try {
expect(expected).each.have.property('foo');
console.log(testName + " has sucsess");
} catch(e) {
console.log(testName + " fails with : " + e);
}
};
test("Nominal case", [{foo:'bar'},{foo:'buzz'}]);
test("Error case", [{foo:'bar'}, {bar:0},{foo:'buzz'}]);<script src="https://cdnjs.cloudflare.com/ajax/libs/chai/4.2.0/chai.min.js"></script>
<script>chaiEach = function(chai, utils) {
const propertyNames = Object.getOwnPropertyNames(chai.Assertion.prototype);
const propertyDescs = {};
for (const name of propertyNames) {
propertyDescs[name] = Object.getOwnPropertyDescriptor(chai.Assertion.prototype, name);
}
const methodNames = propertyNames.filter(name => {
return name !== "assert" && typeof propertyDescs[name].value === "function";
});
chai.Assertion.addProperty('each', function () {
const each = utils.flag(this, 'each') || 0;
utils.flag(this, 'each', each + 1);
});
methodNames.forEach(methodName => {
chai.Assertion.overwriteMethod(methodName, function (_super) {
return function assertEach () {
if (utils.flag(this, 'each')) {
const each = utils.flag(this, 'each');
utils.flag(this, 'each', each - 1);
var obj = this._obj;
new chai.Assertion(obj).is.an.instanceOf(Array);
obj.map(item => {
const that = cloneAssertion(this);
utils.flag(that, 'object', item);
_super.apply(that, arguments);
return utils.flag(that, 'object');
});
} else {
_super.apply(this, arguments);
}
};
});
});
function cloneAssertion(original) {
const copy = Object.create(original);
utils.transferFlags(original, copy, false);
return copy;
}
};</script>