/*
*
* Copyright 2015 Netflix, Inc.
*
* Licensed 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 com.netflix.util.concurrent;
import org.junit.Assert;
import org.junit.Test;
import java.util.HashSet;
import java.util.Set;
import java.util.UUID;
/**
* Unit tests for the ConcurrentUUIDFactory class.
*/
public class ConcurrentUUIDFactoryTest {
@Test
public void testGenerateRandomUuidVersionAndVariant() throws Exception {
final UUID uuid = new ConcurrentUUIDFactory().generateRandomUuid();
Assert.assertEquals(4, uuid.version());
Assert.assertEquals(2, uuid.variant());
}
@Test
public void testGenerateRandomUuidNonConstant() throws Exception {
final int numValues = 1000;
final Set<UUID> values = new HashSet<>();
final ConcurrentUUIDFactory factory = new ConcurrentUUIDFactory();
for (int i = 0; i < numValues; ++i) {
final UUID newUuid = factory.generateRandomUuid();
Assert.assertTrue("Already generated UUID with value: " + newUuid, values.add(newUuid));
}
Assert.assertEquals(numValues, values.size());
}
}