UniformNumberGeneratorLongTest.java

package com.ldbc.driver.generator;

import com.google.common.collect.Range;
import com.ldbc.driver.util.Bucket.NumberRangeBucket;
import com.ldbc.driver.util.Histogram;

import java.util.Iterator;

public class UniformNumberGeneratorLongTest extends NumberGeneratorTest<Long, Long> {
    private final long min = 0;
    private final long max = 5;

    @Override
    public double getMeanTolerance() {
        return 0.1;
    }

    @Override
    public double getDistributionTolerance() {
        return 0.01;
    }

    @Override
    public Iterator<Long> getGeneratorImpl(GeneratorFactory generatorFactory) {
        return generatorFactory.uniform(min, max);
    }

    @Override
    public Histogram<Long, Long> getExpectedDistribution() {
        Histogram<Long, Long> expectedDistribution = new Histogram<>(0l);
        expectedDistribution.addBucket(new NumberRangeBucket<Long>(Range.closedOpen(-0.5d, 0.5d)), 1l);
        expectedDistribution.addBucket(new NumberRangeBucket<Long>(Range.closedOpen(0.5d, 1.5d)), 1l);
        expectedDistribution.addBucket(new NumberRangeBucket<Long>(Range.closedOpen(1.5d, 2.5d)), 1l);
        expectedDistribution.addBucket(new NumberRangeBucket<Long>(Range.closedOpen(2.5d, 3.5d)), 1l);
        expectedDistribution.addBucket(new NumberRangeBucket<Long>(Range.closedOpen(3.5d, 4.5d)), 1l);
        expectedDistribution.addBucket(new NumberRangeBucket<Long>(Range.closed(4.5d, 5.5d)), 1l);
        return expectedDistribution;
    }

    @Override
    public double getExpectedMean() {
        return ((double) max - (double) min) / 2;
    }
}