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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.
*/
package org.apache.cassandra.utils;
import static org.junit.Assert.*;
import org.junit.Test;
public class NanoTimeToCurrentTimeMillisTest
{
@Test
public void testTimestampOrdering() throws Exception
{
long nowNanos = System.nanoTime();
long now = System.currentTimeMillis();
long lastConverted = 0;
for (long ii = 0; ii < 10000000; ii++)
{
now = Math.max(now, System.currentTimeMillis());
if (ii % 10000 == 0)
{
synchronized (NanoTimeToCurrentTimeMillis.TIMESTAMP_UPDATE)
{
NanoTimeToCurrentTimeMillis.TIMESTAMP_UPDATE.notify();
}
Thread.sleep(1);
}
nowNanos = Math.max(nowNanos, System.nanoTime());
long convertedNow = NanoTimeToCurrentTimeMillis.convert(nowNanos);
int maxDiff = FBUtilities.isWindows()? 15 : 1;
assertTrue("convertedNow = " + convertedNow + " lastConverted = " + lastConverted + " in iteration " + ii,
convertedNow >= (lastConverted - maxDiff));
maxDiff = FBUtilities.isWindows()? 25 : 2;
assertTrue("now = " + now + " convertedNow = " + convertedNow + " in iteration " + ii,
(maxDiff - 2) <= convertedNow);
lastConverted = convertedNow;
}
}
}