如何对属性更改事件进行单元测试
如何对属性更改事件进行单元测试
提问于 2017-08-30 01:09:27
我有一个允许我处理属性事件的服务(它将在StartDateTime更改时触发)，我想知道如何对此服务进行单元测试，或者如何开始对此属性更改进行单元测试。我必须模拟这个服务吗？
[Export(typeof(IDriveTimeService))]
public class DriveTimeService : IDriveTimeService
{
public void Initialize(IHasDriveTimes target)
{
var _driveTimeService = new DriveTimeService ();
new DriveTimesManager(target);
}
}DriveTimesManager
public DriveTimesManager(IHasDriveTimes target)
{
if (target != null)
{
target.PropertyChanged += HandleDriveTimesChanged;
}
}
private void HandleDriveTimesChanged(object sender, PropertyChangedEventArgs e)
{
var driveTimes = sender as IHasDriveTimes;
if (driveTimes != null)
{
if (e.PropertyName == driveTimes.GetPropertyName(t => t.StartDateTime))
{
driveTimes.StopDateTime += driveTimes.StartDateTime - _previousStartDateTime;
_previousStartDateTime = driveTimes.StartDateTime;
}
}
}Edit:这是我尝试过的方法，但我仍然不知道如何测试StartDateTime是否被调用
[TestClass]
public class DriveTimeServiceTest
{
[TestMethod]
public void DriveTimeServiceNullTest()
{
var driveTimeService = new DriveTimeService();
driveTimeService.Initialize(null);
Assert.IsNotNull(driveTimeService);
}
[TestMethod]
public void DriveTimeManagerTest()
{
var propertyName = "";
var mock = new Mock<IHasDriveTimes>();
DriveTimesManager manager = new DriveTimesManager(mock.Object);
var change = new PropertyChangedEventArgs(propertyName);
mock.Verify(m => m.StartDateTime);
mock.Verify(m => m.StopDateTime);
manager.HandleDriveTimesChanged(manager, change);
}
}回答 1
Stack Overflow用户
回答已采纳
发布于 2017-09-01 03:42:00
我得到了帮助，并找到了解决方案。我需要的是模拟我的构造函数中的接口，然后我就可以设置这个模拟了
var driveTimeService = new DriveTimeService();
var mock = new Mock<IHasDriveTimes>().SetupAllProperties();
mock.Object.StartDateTime = DateTimeOffset.Now.Date;
mock.Object.StopDateTime = mock.Object.StartDateTime + TimeSpan.FromHours(2);
driveTimeService.Initialize(mock.Object);
mock.Object.StartDateTime += TimeSpan.FromHours(1);
mock.Raise(t => t.PropertyChanged += It.IsAny<PropertyChangedEventHandler>(), new PropertyChangedEventArgs(mock.Object.GetPropertyName(t => t.StartDateTime)));
Assert.AreEqual(mock.Object.StartDateTime + TimeSpan.FromHours(2), mock.Object.StopDateTime);页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/45944721
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