/*
* Copyright 2012, Facebook, 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.facebook.LinkBench;
import java.util.Random;
import org.junit.Test;
import com.facebook.LinkBench.distributions.ProbabilityDistribution;
import com.facebook.LinkBench.distributions.UniformDistribution;
public class UniformDistTest extends DistributionTestBase {
@Override
public ProbabilityDistribution getDist() {
return new UniformDistribution();
}
@Test
public void testInRange() {
// Check 2^31 < n < 2^32 and n > 2^32
long maxes[] = {(long)Math.pow(2, 31.5), (long)Math.pow(2, 34.23)};
int trials = 10000;
Random rng = new Random();
for (long max: maxes) {
UniformDistribution dist = new UniformDistribution();
dist.init(0, max, 1);
for (int trial = 0; trial < trials; trial++) {
long i = dist.choose(rng);
assertTrue(i >= 0);
assertTrue(i < max);
}
}
}
}