src/Test/Store/TestLock.cs

/*
 * 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.
 */

/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001,2004 The Apache Software Foundation.  All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in
*    the documentation and/or other materials provided with the
*    distribution.
*
* 3. The end-user documentation included with the redistribution,
*    if any, must include the following acknowledgment:
*       "This product includes software developed by the
*        Apache Software Foundation (http://www.apache.org/)."
*    Alternately, this acknowledgment may appear in the software itself,
*    if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
*    "Apache Lucene" must not be used to endorse or promote products
*    derived from this software without prior written permission. For
*    written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
*    "Apache Lucene", nor may "Apache" appear in their name, without
*    prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation.  For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/

using System;

using NUnit.Framework;

using LuceneTestCase = Lucene.Net.Util.LuceneTestCase;

namespace Lucene.Net.Store
{
	
	[TestFixture]
	public class TestLock : LuceneTestCase
	{
		
		[Test]
		public virtual void  TestObtain()
		{
			LockMock lock_Renamed = new LockMock(this);
			Lucene.Net.Store.Lock.LOCK_POLL_INTERVAL = 10;
			
			try
			{
				lock_Renamed.Obtain(Lucene.Net.Store.Lock.LOCK_POLL_INTERVAL);
				Assert.Fail("Should have failed to obtain lock");
			}
			catch (System.IO.IOException)
			{
				Assert.AreEqual(lock_Renamed.lockAttempts, 2, "should attempt to lock more than once");
			}
		}
		
		private class LockMock : Lucene.Net.Store.Lock
		{
			public LockMock(TestLock enclosingInstance)
			{
				InitBlock(enclosingInstance);
			}
			private void  InitBlock(TestLock enclosingInstance)
			{
				this.enclosingInstance = enclosingInstance;
			}
			private TestLock enclosingInstance;
			override public bool IsLocked()
			{
				return false;
			}
			public TestLock Enclosing_Instance
			{
				get
				{
					return enclosingInstance;
				}
				
			}
			public int lockAttempts;
			
			public override bool Obtain()
			{
				lockAttempts++;
				return false;
			}
			public override void  Release()
			{
				// do nothing
			}
		}
	}
}