Angularjs 使用.success（）获取'；未定义'；不是对象'；

我正在尝试编写一个单元测试，以查看如果某些属性设置正确，是否会调用控制器中的“getStudents（）”提供程序函数。请注意.success（）回调：

 $scope.update = function update() {
    // omitted, just doing some checking...
    // finally 
    else if (key.length === 3 || $scope.students.length === 0) {
       StudentsProvider.getStudents($scope.keyword, $scope.selectedFilters).success(function(data) {
           $scope.students = data;
       });
    }
 };

我的业力单元测试如下所示：

describe("Students: Controllers", function () {
    var $scope;
    var ctrl;
    beforeEach(module('studentsApp'));

    describe("SearchCtrl", function () {
        // Mock the provider
        var mockStudentsProvider = {
            getStudents: function getStudents() {
                return [
                    {
                         Education: [], 
                         Person: [{ 
                             ID: 1, 
                             Name: "Testing McTestsson", 
                             SSN: "1234567890",
                             Address: "Fakestreet 3", MobilePhone: "7777777"
                         }]
                    }
                ];
             }
         };
         var StudentsProvider;
         beforeEach(inject(function ($controller, $rootScope) {
             $scope = $rootScope.$new();
             ctrl = $controller('SearchCtrl', { $scope: $scope, StudentsProvider: mockStudentsProvider});
             StudentsProvider = mockStudentsProvider;
         }));
         describe("Update", function () {
             beforeEach(function () {
                 spyOn(StudentsProvider, 'getStudents');
             });
             it("should always call the provider with 3 letters", function () {
                 $scope.keyword = "axe";
                 $scope.update();
                 expect(StudentsProvider.getStudents).toHaveBeenCalled();
                 expect(StudentsProvider.getStudents).toHaveBeenCalledWith("axe", "");
             });
         });
    });
});

当我运行此操作时，会出现以下错误：

TypeError: 'undefined' is not an object (evaluating 'StudentsProvider.getStudents($scope.keyword, $scope.selectedFilters).success')

这可能是因为我没有嘲笑.success（）回调函数。我该怎么做？提前谢谢

替换这个：

var mockStudentsProvider = {

    getStudents: function getStudents() {
        return [{
            Education: [],
            Person: [{
                ID: 1,
                Name: "Testing McTestsson",
                SSN: "1234567890",
                Address: "Fakestreet 3",
                MobilePhone: "7777777"
            }]
        }];
    }
};

spyOn(StudentsProvider, 'getStudents');

为此：

var mockStudentsProvider = {
    getStudents: function getStudents() {
        var retVal = [{
            Education: [],
            Person: [{
                ID: 1,
                Name: "Testing McTestsson",
                SSN: "1234567890",
                Address: "Fakestreet 3",
                MobilePhone: "7777777"
            }]
        }];
        return {
            success: function(fn) {
                fn(retVal)
            };

        }
    }
};

spyOn(StudentsProvider, 'getStudents').andCallThrough();

并将其替换为：

var mockStudentsProvider = {

    getStudents: function getStudents() {
        return [{
            Education: [],
            Person: [{
                ID: 1,
                Name: "Testing McTestsson",
                SSN: "1234567890",
                Address: "Fakestreet 3",
                MobilePhone: "7777777"
            }]
        }];
    }
};

spyOn(StudentsProvider, 'getStudents');

为此：

var mockStudentsProvider = {
    getStudents: function getStudents() {
        var retVal = [{
            Education: [],
            Person: [{
                ID: 1,
                Name: "Testing McTestsson",
                SSN: "1234567890",
                Address: "Fakestreet 3",
                MobilePhone: "7777777"
            }]
        }];
        return {
            success: function(fn) {
                fn(retVal)
            };

        }
    }
};

spyOn(StudentsProvider, 'getStudents').andCallThrough();

当您不使用

和callthrough（）

或

和callfake（）

时，jasmine会阻止方法的执行并返回null。在更新方法中，您正在调用

null.success

。这将失败。（）

在mock方法中，您需要更改返回格式——真正的http方法返回一个对象，其中success引用一个函数，该函数将输入作为回调函数

在您的情况下，回调函数是：

function(data) {
   $scope.students = data;
}