我正在尝试为面包屑指令/服务编写一个简单的单元测试。基本上,我想做的只是更改 location.path(或任何正确的方法),然后能够在指令的 HTML 上运行期望,以查看面包屑列表是否已更新。
breadcrumb service(借用自 AngularJS Breadcrumbs Service)看起来像这样:
var commonModule = angular.module('app.common');
commonModule.factory('common.service.breadcrumbs', ['$rootScope', '$location', function($rootScope, $location){
var breadcrumbs = [];
var breadcrumbsService = {};
function setBreadcrumbs() {
var pathElements = $location.path().split('/'), result = [], i;
var breadcrumbPath = function (index) {
return '/' + (pathElements.slice(0, index + 1)).join('/');
};
pathElements.shift();
for (i=0; i<pathElements.length; i++) {
result.push({name: pathElements[i], path: breadcrumbPath(i)});
}
breadcrumbs = result;
}
setBreadcrumbs();
// We want to update breadcrumbs only when a route is actually changed
// $location.path() will get updated immediately (even if route change fails!)
$rootScope.$on('$routeChangeSuccess', function(event, current){
setBreadcrumbs();
});
breadcrumbsService.getAll = function() {
return breadcrumbs;
};
breadcrumbsService.getFirst = function() {
return breadcrumbs[0] || {};
};
return breadcrumbsService;
}]);
我目前的测试如下所示:
describe("Directive:", function() {
beforeEach(angular.mock.module("app"));
var $compile,
$scope,
$location;
// Angular strips the underscores when injecting
beforeEach(inject(function(_$compile_, _$rootScope_, _$location_) {
$compile = _$compile_;
$scope = _$rootScope_.$new();
$location = _$location_;
}));
describe("breadcrumbs", function () {
it("correctly display the path as breadcrumbs.",
inject(['common.service.breadcrumbs', function(breadcrumbs) {
//console.log($location.path());
//$scope.$apply();
$location.path('/analyze/reports');
$scope.$apply();
//console.log($location.path());
//console.log(breadcrumbs.getAll());
$scope.$broadcast('$routeChangeSuccess', {});
// Build the directive
var element = $compile('<div class="cf-breadcrumbs" cf-breadcrumbs></div>')($scope);
$scope.$apply();
console.log(element.html());
}]));
});
});
目前,我从未看到面包屑服务更新面包屑数组。我试过 console.log(breadcrumbs.getAll()),它总是返回相同的数组,而没有两个新的路径元素。我担心这可能与时间有关,但不确定在我进行检查/应用之前,我将如何等待$routeChangeSuccess事件影响服务。
长话短说,我将如何测试以查看面包屑是否已适当更新?
中$broadcast$rootScope。 $scope是$rootScope的子作用域,因为它是用$rootScope.$new()
创建的,因此从该范围广播的事件不会向上移动到您附加$on处理程序的位置。
$broadcasts向下移动到子范围,而$emits向上移动。