UnitTest 和 PostSharp 工具包、域和线程

我正在尝试对用NotifyPropertyChanged和DispatchMethod装饰的模型进行单元测试。

基本模型

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Windows.Forms;
public abstract class BaseModel : INotifyPropertyChanged, IDisposable
{
    #region Fields
    private readonly HashSet<string> ignorablePropertyNameses = new HashSet<string>();
    private bool isDirty;
    #endregion
    #region Constructors and Destructors
    protected BaseModel() { this._propertyChanged += this.OnAnyPropertyChanged; }
    #endregion
    #region Public Events
    public event PropertyChangedEventHandler PropertyChanged
    {
        add { this._propertyChanged += value; }
        remove { this._propertyChanged -= value; }
    }
    #endregion
    #region Events
    private event PropertyChangedEventHandler _propertyChanged;
    #endregion
    #region Public Properties
    public HashSet<string> IgnorablePropertyNames
    {
        get { return this.ignorablePropertyNameses; }
    }
    public bool IsDirty
    {
        get { return this.isDirty; }
    }
    #endregion
    #region Public Methods and Operators
    public void Dispose() { this._propertyChanged -= this.OnAnyPropertyChanged; }
    public void RaisePropertyChanged(string propertyName)
    {
        if (null != this._propertyChanged)
        {
            this._propertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }
    public virtual void Save()
    {
        this.isDirty = false;
        MessageBox.Show("Changes have been saved");
    }
    public void SetClean() { this.isDirty = false; }
    #endregion
    #region Methods
    protected void OnPropertyChanged(string propertyName)
    {
        PropertyChangedEventHandler handler = this._propertyChanged;
        if (handler != null)
        {
            handler(this, new PropertyChangedEventArgs(propertyName));
        }
    }
    private void OnAnyPropertyChanged(object sender, PropertyChangedEventArgs propertyChangedEventArgs)
    {
        if (!this.ignorablePropertyNameses.Contains(propertyChangedEventArgs.PropertyName))
        {
            this.isDirty = true;
        }
    }
    #endregion
}

狗模特

using System;
using System.Threading;
using AGP.WinForms.MVC.PassiveView;
using PostSharp.Toolkit.Domain;
using PostSharp.Toolkit.Threading;
[NotifyPropertyChanged]
public class DogModel : BaseModel
{
    #region Fields
    private Timer timer;
    #endregion
    #region Constructors and Destructors
    public DogModel()
    {
        this.IgnorablePropertyNames.Add("CurrentDateAndTime");
        this.timer = new Timer(state => this.BroadcastTime(), null, TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(1));
    }
    #endregion
    #region Public Properties
    public string Breed { get; set; }
    public DateTime CurrentDateAndTime { get; set; }
    public string Name { get; set; }
    #endregion
    #region Methods
    [DispatchedMethod]
    private void BroadcastTime() { this.CurrentDateAndTime = DateTime.Now; }
    #endregion
}

使用此测试：

using NUnit.Framework;
[TestFixture]
public class DogModelTests
{
    [Test]
    public void DirtyFlag()
    {
        var model = new DogModel();
        Assert.IsFalse(model.IsDirty);
    }
}

但是在测试执行时出现以下错误：

System.InvalidOperationException ：标有 DispatcherObjectAspect 的类的实例只能在具有同步上下文的线程（通常是 WPF 或 Windows.Forms UI 线程）上创建，或者必须手动实现 IDispatcherObject。

如何提供所需的同步上下文？

    [SetUp]
    public void SetUp()
    {
        SynchronizationContext.SetSynchronizationContext(new SynchronizationContext());
    }