File: TestRunnerThread.cs

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// ****************************************************************
// This is free software licensed under the NUnit license. You
// may obtain a copy of the license as well as information regarding
// copyright ownership at http://nunit.org/?p=license&r=2.4.
// ****************************************************************

using System;
using System.Threading;
using System.Configuration;
using System.Collections.Specialized;

namespace NUnit.Core
{
	/// <summary>
	/// TestRunnerThread encapsulates running a test on a thread.
	/// It knows how to create the thread based on configuration
	/// settings and can cancel abort the test if necessary.
	/// </summary>
	public class TestRunnerThread
	{
		#region Private Fields

		/// <summary>
		/// The Test runner to be used in running tests on the thread
		/// </summary>
		private TestRunner runner;

		/// <summary>
		/// The System.Threading.Thread created by the object
		/// </summary>
		private Thread thread;

		/// <summary>
		/// Collection of TestRunner settings from the config file
		/// </summary>
		private NameValueCollection settings;

		/// <summary>
		/// The EventListener interface to receive test events
		/// </summary>
		private NUnit.Core.EventListener listener;

		/// <summary>
		/// Array of test names for ues by the thread proc
		/// </summary>
		//private string[] testNames;
		private ITestFilter filter;
			
		/// <summary>
		/// Array of returned results
		/// </summary>
		private TestResult[] results;

		#endregion

		#region Properties

		/// <summary>
		/// True if the thread is executing
		/// </summary>
		public bool IsAlive
		{
			get	{ return this.thread.IsAlive; }
		}

		/// <summary>
		/// Array of returned results
		/// </summary>
		public TestResult[] Results
		{
			get { return results; }
		}

		#endregion

		#region Constructor

		public TestRunnerThread( TestRunner runner ) 
		{ 
			this.runner = runner;
			this.thread = new Thread( new ThreadStart( TestRunnerThreadProc ) );
			thread.IsBackground = true;
			thread.Name = "TestRunnerThread";

			this.settings = (NameValueCollection)
				ConfigurationSettings.GetConfig( "NUnit/TestRunner" );
	
			if ( settings != null )
			{
				try
				{
					string apartment = settings["ApartmentState"];
					if ( apartment != null )
						thread.ApartmentState = (ApartmentState)
							System.Enum.Parse( typeof( ApartmentState ), apartment, true );
		
					string priority = settings["ThreadPriority"];
					if ( priority != null )
						thread.Priority = (ThreadPriority)
							System.Enum.Parse( typeof( ThreadPriority ), priority, true );
				}
				catch( ArgumentException ex )
				{
					string msg = string.Format( "Invalid configuration setting in {0}", 
						AppDomain.CurrentDomain.SetupInformation.ConfigurationFile );
					throw new ArgumentException( msg, ex );
				}
			}
		}

		#endregion

		#region Public Methods

		public void Wait()
		{
			if ( this.thread.IsAlive )
				this.thread.Join();
		}

		public void Cancel()
		{
			ThreadUtility.Kill(this.thread);
		}

		public void StartRun( EventListener listener )
		{
			StartRun( listener, TestFilter.Empty );
		}

		public void StartRun( EventListener listener, ITestFilter filter )
		{
			this.listener = listener;
			this.filter = filter;

			thread.Start();
		}

		#endregion

		#region Thread Proc
		/// <summary>
		/// The thread proc for our actual test run
		/// </summary>
		private void TestRunnerThreadProc()
		{
            try
            {
                results = new TestResult[] { runner.Run(this.listener, this.filter) };
            }
            catch (Exception ex)
            {
                throw new ApplicationException("Exception in TestRunnerThread", ex);
            }
		}
		#endregion
	}
}