Question

我在测试我的承诺单元测试时遇到了问题。

我提出了一个名为＆＃34; expect（scope.test）.toBe（12）; ＆＃34;的断言。这是在我的代码中返回的承诺内部。

以下是我尝试测试的实际代码：

$scope.getBudgets = function(){
    BudgetService.getBudgets().then(function(response) {
        $scope.test = 12;

    }, function(response) {

    });
}

以下是我的单元测试：

describe('budgetOverviewCtrl tests', function() {

beforeEach(module('app'));
beforeEach(module('ngRoute'));

var ctrl, scope, deferred;

describe('budgetOverviewCtrl with test', function() {
    beforeEach(inject(function($controller, _$rootScope_) {

        scope = _$rootScope_.$new();

        ctrl = $controller('budgetOverviewCtrl', {
            $scope: scope
        });         
    }));

    it('Should check if getBudgets service promise exists and returns as expected', inject(function($injector, $q, BudgetService) { 

        BudgetService = $injector.get("BudgetService");         

        deferred = $q.defer();
        deferred.resolve({"Hello": "World"});   

        spyOn(BudgetService, 'getBudgets').and.callFake(function() {
            return deferred.promise;
        }); 

        scope.getBudgets();

        expect(BudgetService.getBudgets).toHaveBeenCalled();

        **//Below line isnt called - this is inside the promise then.**
        expect(scope.test).toBe(12);
    }));
});
});

Answer 1

在测试中调用$rootScope.$apply()后，您似乎错过了对scope.getBudgets()的调用。在Angular中，promise成功和错误回调作为摘要周期的一部分运行，必须通过测试手动触发。

茉莉花单元测试嘲笑承诺

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