TimeUUIDTypeTest.java

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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
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*
*    http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
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package org.apache.cassandra.db.marshal;

import java.util.Arrays;
import java.util.Random;

import org.junit.Test;

public class TimeUUIDTypeTest
{
    TimeUUIDType timeUUIDType = new TimeUUIDType();

    @Test
    public void testTimestampComparison()
    {
        Random rng = new Random();
        byte[][] uuids = new byte[100][];
        for (int i = 0; i < uuids.length; i++)
        {
            uuids[i] = new byte[16];
            rng.nextBytes(uuids[i]);
            // set version to 1
            uuids[i][6] &= 0x0F;
            uuids[i][6] |= 0x10;
        }
        Arrays.sort(uuids, timeUUIDType);
        for (int i = 1; i < uuids.length; i++)
        {
            long i0 = LexicalUUIDType.getUUID(uuids[i - 1]).timestamp();
            long i1 = LexicalUUIDType.getUUID(uuids[i]).timestamp();
            assert i0 <= i1;
        }
    }
}