javascript - undefined 不是一个对象(评估 '$scope.students.pay' )

Question

我有一个这样的测试:

it('calls the stuFun method', function () {
     $scope.stuFun();
     expect($scope.stuFun).to
            .have.been.calledOnce;
     expect($scope.students.pay).to.not.equal(null);
     assert.isNotTrue($scope.students.pay)

});

下面是我的 Controller 功能:

$scope.stuFun = function() {
    $scope.students.pay = false;
};

为什么我会收到以下错误:

undefined is not an object (evaluating '$scope.students.pay')

Answer 1

解决方案附在下面:

it('calls the stuFun method', function () {
     $scope.students = {};
     $scope.stuFun();

     expect($scope.stuFun).to
            .have.been.calledOnce;
     expect($scope.students.pay).to.not.equal(null);
     assert.isNotTrue($scope.students.pay)

});

现在运行它，它应该可以工作。