我在为我的 Controller 编写单元测试时遇到问题，该单元测试用元素测试表中的 orderBy。
我有 advert.html:
<body ng-app="motoAdsApp" ng-controller="AdvertsController">
<form>
<label>Sort by</label>
<select ng-model="sortByCol" ng-options="s.name for s in sortByCols">
<option value=""></option>
</select>
</form>
<br/>
<table border="1">
<tr ng-repeat="advert in adverts| orderBy:sortByCol.key">
<td>
<span>{{advert.countryName}}, {{advert.regionName}}</span>
</td>
<td>{{advert.brandName}}</td>
<td>{{advert.modelName}}</td>
<td>{{advert.year}}</td>
<td>{{advert.price}}</td>
</tr>
</table>
</body>
controllers.js:
var motoAdsApp = angular.module('motoAdsApp', []);
motoAdsApp.controller('AdvertsController', ['$scope', function($scope) {
$scope.sortByCols = [{
"key": "year",
"name": "Year"
}, {
"key": "price",
"name": "Price"
}];
$scope.adverts = [];
var allAdverts = ADVERTS_RESPONSE;
$scope.filter = {
brandName: null,
modelName: null,
country: null,
region: null,
yearFrom: null,
yearTo: null
};
$scope.$watch('filter', filterAdverts, true);
function filterAdverts() {
$scope.adverts = [];
angular.forEach(allAdverts, function(row) {
if (!$scope.filter.country) {
$scope.filter.region = null;
}
if ($scope.filter.brandName && $scope.filter.brandName !== row.brandName) {
return;
}
// ...
$scope.adverts.push(row);
});
}
}
]);
我的单元测试 controllersSpec.js:
describe('MotoAds controllers', function() {
beforeEach(function() {
this.addMatchers({
toEqualData: function(expected) {
return angular.equals(this.actual, expected);
}
});
});
beforeEach(module('motoAdsApp'));
describe('AdvertsController', function() {
var scope, ctrl, $httpBackend;
beforeEach(inject(function(_$httpBackend_, $rootScope, $controller) {
$httpBackend = _$httpBackend_;
$httpBackend.expectGET('data/adverts.json').respond(ADVERTS_RESPONSE);
scope = $rootScope.$new();
ctrl = $controller('AdvertsController', {$scope: scope});
}));
it('should sort by year', function() {
$httpBackend.flush();
scope.$apply(function() {
scope.sortByCol = { key: "year"};
});
var prevYear = 0;
for (var i = 0; i < scope.adverts.length; i++) {
var advert = scope.adverts[i];
expect(advert.year).toBeGreaterThan(prevYear);
prevYear = advert.year;
}
});
});
});
运行我的测试后我有这个:
Chrome 30.0.1599 (Windows Vista) MotoAds controllers AdvertsController should so
rt by year FAILED
Expected 2010 to be greater than 2011.
Error: Expected 2010 to be greater than 2011.
at null.<anonymous> (D:/projects/motoads/test/unit/controllers
Spec.js:147:29)
Expected 2009 to be greater than 2012.
Error: Expected 2009 to be greater than 2012.
我认为元素(广告)没有排序。为什么？我该怎么办？
最佳答案
orderBy 过滤器在像 ng-repeat 这样的元素上使用时，实际上不会对它过滤的数组对象进行排序。数组对象保持不变，但编译器用于创建所有 html 的输出数组已修改。
所以你的 $scope.adverts 数组永远不会改变。它输出到 View 的方式发生了变化，但数组本身没有变化。
单元测试的这一部分看起来更像是您将使用 E2E 测试进行测试的内容。 Controller 并不真正关心元素如何显示。这更多是对观点的责任。 Controller 只关心数据是否从 API 中获取，然后传递给 View 。然后 e2e 测试实际上可以扫描 View 并确保元素被正确排序。
更新:
如果您想在测试中调用 orderBy 过滤器，您可以使用类似于以下的内容来实现:
...
var scope, ctrl, $httpBackend, orderByFilter;
beforeEach(inject(function(_$httpBackend_, $rootScope, $controller, $filter) {
$httpBackend = _$httpBackend_;
$httpBackend.expectGET('data/adverts.json').respond(ADVERTS_RESPONSE);
orderByFilter = $filter('orderBy');
scope = $rootScope.$new();
ctrl = $controller('AdvertsController', {$scope: scope});
}));
...
it('should do something', function(){
var sortedArray = orderByFilter(scope.adverts, scope.sortByCol.key);
// do something with the sorted array here
});
...
找到了有关如何从 javascript 访问 orderBy 过滤器的文档 here
希望对您有所帮助。
关于javascript - angularjs 单元测试 Controller orderBy，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/19776573/