| /* |
| * |
| * 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. |
| * |
| */ |
| package org.apache.qpid.util; |
| |
| |
| import org.apache.qpid.test.utils.QpidTestCase; |
| |
| /** |
| *Junit tests for the Serial class |
| */ |
| public class SerialTest extends QpidTestCase |
| { |
| |
| /** |
| * 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 returned false for: (" + (s + n) + " > " + s + "), n=" + n, Serial.gt(s + n, s)); |
| assertTrue("Serial.lt returned false for: (" + s + " < " + (s + n) + "), n=" + n, Serial.lt(s, s + n)); |
| } |
| |
| s += 1024; |
| |
| if (s == 0) |
| { |
| wrapcount += 1; |
| } |
| } |
| |
| assertTrue(wrapcount > 0); |
| } |
| |
| } |