不確定是不是（評估 '$ scope.students.pay'）

Question

我有一個這樣的測試對象：

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) 

}); 

下面是我的控制器功能：

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

爲什麼我收到下面的錯誤：

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

Answer 1

液附着下面：

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) 

}); 

現在運行它，它應該工作。