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//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,
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package org.apache.commons.math4.random;
import org.apache.commons.rng.UniformRandomProvider;
import org.apache.commons.rng.simple.RandomSource;
import org.apache.commons.math4.stat.StatUtils;
import org.junit.Assert;
import org.junit.Test;
public class UniformRandomGeneratorTest {
@Test
public void testMeanAndStandardDeviation() {
final UniformRandomProvider rg = RandomSource.create(RandomSource.ISAAC, 17399225432L);
UniformRandomGenerator generator = new UniformRandomGenerator(rg);
double[] sample = new double[10000];
for (int i = 0; i < sample.length; ++i) {
sample[i] = generator.nextNormalizedDouble();
}
Assert.assertEquals(0.0, StatUtils.mean(sample), 0.07);
Assert.assertEquals(1.0, StatUtils.variance(sample), 0.02);
}
}