我正在尝试编写业力/茉莉花测试,我想了解一些关于模拟如何处理正在返回承诺的服务的解释。我解释一下我的情况:
我有一个控制器,我在其中进行以下调用:
mapService.getMapByUuid(mapUUID, isEditor).then(function(datas){
fillMapDatas(datas);
});
function fillMapDatas(datas){
if($scope.elements === undefined){
$scope.elements = [];
}
//Here while debugging my unit test, 'datas' contain the promise javascript object instead //of my real reponse.
debugger;
var allOfThem = _.union($scope.elements, datas.elements);
...
以下是我的服务方式:
(function () {
'use strict';
var serviceId = 'mapService';
angular.module('onmap.map-module.services').factory(serviceId, [
'$resource',
'appContext',
'restHello',
'restMap',
serviceFunc]);
function serviceFunc($resource, appContext, restHello, restMap) {
var Maps = $resource(appContext+restMap, {uuid: '@uuid', editor: '@editor'});
return{
getMapByUuid: function (uuid, modeEditor) {
var maps = Maps.get({'uuid' : uuid, 'editor': modeEditor});
return maps.$promise;
}
};
}
})();
最后,这是我的单元测试:
describe('Map controller', function() {
var $scope, $rootScope, $httpBackend, $timeout, createController, MapService, $resource;
beforeEach(module('onmapApp'));
beforeEach(inject(function($injector) {
$httpBackend = $injector.get('$httpBackend');
$rootScope = $injector.get('$rootScope');
$scope = $rootScope.$new();
var $controller = $injector.get('$controller');
createController = function() {
return $controller('maps.ctrl', {
'$scope': $scope
});
};
}));
afterEach(function() {
$httpBackend.verifyNoOutstandingExpectation();
$httpBackend.verifyNoOutstandingRequest();
});
var response = {"elements":[1,2,3]};
it('should allow user to get a map', function() {
var controller = createController();
$httpBackend.expect('GET', '/onmap/rest/map/MY-UUID?editor=true')
.respond({
"success": response
});
// hope to call /onmap/rest/map/MY-UUID?editor=true url and hope to have response as the fillMapDatas parameter
$scope.getMapByUUID('MY-UUID', true);
$httpBackend.flush();
});
});
我真正想做的是让我的响应对象({“elements:...})作为fillMapDatas函数的datas参数。我不明白如何模拟所有服务事物(服务,承诺) ,然后)
答案 0 :(得分:25)
如果您的服务响应符合预期,那么您想测试一下吗?然后,这是你宁愿在服务上测试的东西。基于单元测试承诺的方法可能如下所示:
var mapService, $httpBackend, $q, $rootScope;
beforeEach(inject(function (_mapService_, _$httpBackend_, _$q_, _$rootScope_) {
mapService = mapService;
$httpBackend = _$httpBackend_;
$q = _$q_;
$rootScope = _$rootScope_;
// expect the actual request
$httpBackend.expect('GET', '/onmap/rest/map/uuid?editor=true');
// react on that request
$httpBackend.whenGET('/onmap/rest/map/uuid?editor=true').respond({
success: {
elements: [1, 2, 3]
}
});
}));
如您所见,您不需要使用$injector
,因为您可以直接注入所需的服务。如果您想在整个测试过程中使用正确的服务名称,可以使用前缀和后缀“_”注入它们,inject()
足够聪明,可以识别您的意思。我们还为每个$httpBackend
规范设置了it()
模拟。我们设置$q
和$rootScope
以供日后处理。
以下是测试服务方法返回承诺的方法:
it('should return a promise', function () {
expect(mapService.getMapUuid('uuid', true).then).toBeDefined();
});
由于promise始终具有.then()
方法,我们可以检查此属性以查看它是否是一个承诺(当然,其他对象也可以使用此方法)。
接下来,您可以测试您使用正确值解析的承诺。您可以设置明确解决的deferred
。
it('should resolve with [something]', function () {
var data;
// set up a deferred
var deferred = $q.defer();
// get promise reference
var promise = deferred.promise;
// set up promise resolve callback
promise.then(function (response) {
data = response.success;
});
mapService.getMapUuid('uuid', true).then(function(response) {
// resolve our deferred with the response when it returns
deferred.resolve(response);
});
// force `$digest` to resolve/reject deferreds
$rootScope.$digest();
// make your actual test
expect(data).toEqual([something]);
});
希望这有帮助!