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/*
*
* 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.
*
*/
#include "qpid_test_plugin.h"
#include <iostream>
#include "qpid/framing/SequenceNumber.h"
using namespace qpid::framing;
class SequenceNumberTest : public CppUnit::TestCase
{
CPPUNIT_TEST_SUITE(SequenceNumberTest);
CPPUNIT_TEST(testIncrementPostfix);
CPPUNIT_TEST(testIncrementPrefix);
CPPUNIT_TEST(testWrapAround);
CPPUNIT_TEST_SUITE_END();
public:
void testIncrementPostfix()
{
SequenceNumber a;
SequenceNumber b;
CPPUNIT_ASSERT(!(a > b));
CPPUNIT_ASSERT(!(b < a));
CPPUNIT_ASSERT(a == b);
SequenceNumber c = a++;
CPPUNIT_ASSERT(a > b);
CPPUNIT_ASSERT(b < a);
CPPUNIT_ASSERT(a != b);
CPPUNIT_ASSERT(c < a);
CPPUNIT_ASSERT(a != c);
b++;
CPPUNIT_ASSERT(!(a > b));
CPPUNIT_ASSERT(!(b < a));
CPPUNIT_ASSERT(a == b);
CPPUNIT_ASSERT(c < b);
CPPUNIT_ASSERT(b != c);
}
void testIncrementPrefix()
{
SequenceNumber a;
SequenceNumber b;
CPPUNIT_ASSERT(!(a > b));
CPPUNIT_ASSERT(!(b < a));
CPPUNIT_ASSERT(a == b);
SequenceNumber c = ++a;
CPPUNIT_ASSERT(a > b);
CPPUNIT_ASSERT(b < a);
CPPUNIT_ASSERT(a != b);
CPPUNIT_ASSERT(a == c);
++b;
CPPUNIT_ASSERT(!(a > b));
CPPUNIT_ASSERT(!(b < a));
CPPUNIT_ASSERT(a == b);
}
void testWrapAround()
{
const uint32_t max = 0xFFFFFFFF;
SequenceNumber a(max - 10);
SequenceNumber b(max - 5);
//increment until b wraps around
for (int i = 0; i < 6; i++) {
CPPUNIT_ASSERT(++a < ++b);//test prefix
}
//verify we have wrapped around
CPPUNIT_ASSERT(a.getValue() > b.getValue());
//keep incrementing until a also wraps around
for (int i = 0; i < 6; i++) {
CPPUNIT_ASSERT(a++ < b++);//test postfix
}
//let a 'catch up'
for (int i = 0; i < 5; i++) {
a++;
}
CPPUNIT_ASSERT(a == b);
CPPUNIT_ASSERT(++a > b);
}
};
// Make this test suite a plugin.
CPPUNIT_PLUGIN_IMPLEMENT();
CPPUNIT_TEST_SUITE_REGISTRATION(SequenceNumberTest);
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