using System.Threading;

namespace Lucene.Net.Util
{

	/*using TestRule = org.junit.rules.TestRule;
	using Description = org.junit.runner.Description;
	using Statement = org.junit.runners.model.Statement;*/

	/*
	 * Licensed to the Apache Software Foundation (ASF) under one or more
	 * contributor license agreements.  See the NOTICE file distributed with
	 * this work for additional information regarding copyright ownership.
	 * The ASF licenses this file to You under the Apache License, Version 2.0
	 * (the "License"); you may not use this file except in compliance with
	 * the License.  You may obtain a copy of the License at
	 *
	 *     http://www.apache.org/licenses/LICENSE-2.0
	 *
	 * Unless required by applicable law or agreed to in writing, software
	 * distributed under the License is distributed on an "AS IS" BASIS,
	 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	 * See the License for the specific language governing permissions and
	 * limitations under the License.
	 */

	/// <summary>
	/// Saves the executing thread and method name of the test case.
	/// </summary>
	internal sealed class TestRuleThreadAndTestName : TestRule
	{
	  /// <summary>
	  /// The thread executing the current test case. </summary>
	  /// <seealso> cref= LuceneTestCase#isTestThread() </seealso>
	  public volatile Thread TestCaseThread;

	  /// <summary>
	  /// Test method name.
	  /// </summary>
	  public volatile string TestMethodName = "<unknown>";

	  public override Statement Apply(Statement @base, Description description)
	  {
		return new StatementAnonymousInnerClassHelper(this, @base, description);
	  }

	  private class StatementAnonymousInnerClassHelper : Statement
	  {
		  private readonly TestRuleThreadAndTestName OuterInstance;

		  private Statement @base;
		  private Description Description;

		  public StatementAnonymousInnerClassHelper(TestRuleThreadAndTestName outerInstance, Statement @base, Description description)
		  {
			  this.OuterInstance = outerInstance;
			  this.@base = @base;
			  this.Description = description;
		  }

		  public override void Evaluate()
		  {
			try
			{
			  Thread current = Thread.CurrentThread;
			  OuterInstance.TestCaseThread = current;
			  OuterInstance.TestMethodName = Description.MethodName;

			  @base.Evaluate();
			}
			finally
			{
			  OuterInstance.TestCaseThread = null;
			  OuterInstance.TestMethodName = null;
			}
		  }
	  }
	}
}