/*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001-2003 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 acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Cactus" and "Apache Software
* Foundation" 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"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* 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/>.
*
*/
package org.apache.cactus.util;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.apache.cactus.ServletTestCase;
import junit.framework.TestCase;
/**
* Smoke test for the unique id generator.
*
* @author <a href="mailto:ndlesiecki@apache.org>Nicholas Lesiecki</a>
* @author <a href="mailto:cmlenz@apache.org>Christopher Lenz</a>
*
* @version $Id: TestUniqueGenerator.java,v 1.2 2003/06/29 15:01:39 cmlenz Exp $
*/
public class TestUniqueGenerator extends TestCase
{
/**
* @see TestCase#setUp
*/
protected void setUp()
{
// let the generator initialize
UniqueGenerator.generate(new ServletTestCase("foo"));
}
/**
* Simulates several simultaneous id generations using threads.
* Verifies that there are no duplicates among the generated ids.
*/
public void testThatSimultaneouslyGeneratedIdsAreUnique()
{
final ServletTestCase aTestCase = new ServletTestCase("foo");
Thread[] threads = new Thread[10];
final List results = Collections.synchronizedList(new ArrayList());
for (int i = 0; i < threads.length; i++)
{
threads[i] = new Thread()
{
public void run()
{
results.add(UniqueGenerator.generate(aTestCase));
}
};
}
// loops separate to make their beginning as simultaneous
// as possible
for (int i = 0; i < threads.length; i++)
{
threads[i].run();
}
try
{
// in case the threads need time to finish
Thread.sleep(200);
}
catch (InterruptedException e)
{
throw new ChainedRuntimeException(e);
}
Set resultSet = new HashSet(results);
assertEquals(
"Results contained duplicate ids.",
results.size(),
resultSet.size());
}
/**
* Sanity check to verify that different IDs are generated for different
* instances of the test class.
*/
public void testThatGeneratedIdsForDifferentTestCasesAreUnique()
{
final ServletTestCase firstTestCase = new ServletTestCase("foo");
final ServletTestCase secondTestCase = new ServletTestCase("foo");
String firstId = UniqueGenerator.generate(firstTestCase, 0);
String secondId = UniqueGenerator.generate(secondTestCase, 0);
assertFalse("IDs not unique", firstId.equals(secondId));
}
/**
* Sanity check to verify that different IDs are generated for different
* test methods/names.
*/
public void testThatGeneratedIdsForDifferentTestMethodsAreUnique()
{
final ServletTestCase aTestCase = new ServletTestCase("foo");
String firstId = UniqueGenerator.generate(aTestCase, 0);
aTestCase.setName("bar");
String secondId = UniqueGenerator.generate(aTestCase, 0);
assertFalse("IDs not unique", firstId.equals(secondId));
}
}