我正在编写单元测试并在尝试从抽象类mock中引发事件时收到异常.以下是示例代码：
public abstract class AbstractBase : EntityObject
{}
[TestMethod]
public void MyTest()
{
var mock = new Mock<AbstractBase>();
var notificationMock = entityMock.As<INotifyPropertyChanged>();
var propertyChangedMapper = new PropertyChangedMapper();
bool eventReceived = false;
propertyChangedMapper.MyPropertyChanged +=
(sender,eventArgs) =>
{
eventReceived = true;
};
propertyChangedMapper.Subscribe((AbstractBase)notificationMock.Object);
Assert.IsFalse(eventReceived);
notificationMock.Raise(e=>e.PropertyChanged += null,new PropertyChangedEventArgs("Property1"));
Assert.IsTrue(eventReceived);
}
显然我可以在INotifyPropertyChanged上使用mock并且事件上升很好,但是在PropertyChangedMapper中我需要将发送者强制转换为AbstractBase,如果使用Mock< INotifyPropertyChanged>
编辑：
根据使用Mock的建议.由于<>()似乎是正确的方法,上面唯一的问题是从notificationMock上升的事件与对象的原始模拟无关.码：
notificationMock.Object.PropertyChanged += (s,e) =>
{
var result = "this one is fired as it should";
};
mock.Object.PropertyChanged += (s,e) =>
{
var result = "this one is not called but is actually what I need";
};
notificationMock.Raise(e => e.PropertyChanged += null,new PropertyChangedEventArgs("Property1"));
解决方法
如果你让你的模拟成为一个多模拟,你可以做所需的演员表.由于Moq模拟通过泛型参数绑定到单个类型,因此必须显式逐步向模拟中添加其他接口或超类,然后在测试中使用最终产品.下面是一个如何执行此操作的简单示例.
var baseMock = new Mock<AbstractBase>(); var inpcMock = baseMock.As<INotifyPropertyChanged>(); // ...setup event... propertyChangedMapper.Subscribe(inpcMock.Object); // ... assertions ...
