为WPF项目创建单元测试

发表于：2008-9-25 16:30 作者：未知来源：网络转载

　　为了让调用线程为STA，我们可以编写一个辅助类CrossThreadTestRunner:

以下是引用片段：
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.Security.Permissions;
using System.Reflection;

namespace TestUnit
{
public class CrossThreadTestRunner
{
private Exception lastException;

public void RunInMTA(ThreadStart userDelegate)
{
Run(userDelegate, ApartmentState.MTA);
}

public void RunInSTA(ThreadStart userDelegate)
{
Run(userDelegate, ApartmentState.STA);
}

private void Run(ThreadStart userDelegate, ApartmentState apartmentState)
{
lastException = null;

Thread thread = new Thread(
delegate()
{
try
{
userDelegate.Invoke();
}
catch (Exception e)
{
lastException = e;
}
});
thread.SetApartmentState(apartmentState);

thread.Start();
thread.Join();

if (ExceptionWasThrown())
ThrowExceptionPreservingStack(lastException);
}

private bool ExceptionWasThrown()
{
return lastException != null;
}

[ReflectionPermission(SecurityAction.Demand)]
private static void ThrowExceptionPreservingStack(Exception exception)
{
FieldInfo remoteStackTraceString = typeof(Exception).GetField(
"_remoteStackTraceString",
BindingFlags.Instance | BindingFlags.NonPublic);
remoteStackTraceString.SetValue(exception, exception.StackTrace + Environment.NewLine);
throw exception;
}
}
}

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