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package org.apache.qpid.util;
/*
*
* 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.
*
*/
import junit.framework.TestCase;
import java.util.Random;
import org.apache.qpid.SerialException;
/**
*Junit tests for the Serial class
*/
public class SerialTest extends TestCase
{
/**
* Test the key boundaries where wraparound occurs.
*/
public void testBoundaries()
{
assertTrue(Serial.gt(1, 0));
assertTrue(Serial.lt(0, 1));
assertTrue(Serial.gt(Integer.MAX_VALUE+1, Integer.MAX_VALUE));
assertTrue(Serial.lt(Integer.MAX_VALUE, Integer.MAX_VALUE+1));
assertTrue(Serial.gt(0xFFFFFFFF + 1, 0xFFFFFFFF));
assertTrue(Serial.lt(0xFFFFFFFF, 0xFFFFFFFF + 1));
}
/**
* Test the first Corollary of RFC 1982
* For any sequence number s and any integer n such that addition of n
* to s is well defined, (s + n) >= s. Further (s + n) == s only when
* n == 0, in all other defined cases, (s + n) > s.
*/
public void testCorollary1()
{
int wrapcount = 0;
int s = 0;
for (int i = 0; i < 67108664; i++)
{
for (int n = 1; n < 4096; n += 512)
{
assertTrue(Serial.gt(s+n, s));
assertTrue(Serial.lt(s, s+n));
}
s += 1024;
if (s == 0)
{
wrapcount += 1;
}
}
assertTrue(wrapcount > 0);
}
}
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