EstimatedHistogramTest.java

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package org.apache.cassandra.utils;

import org.junit.Test;

import static org.junit.Assert.*;


public class EstimatedHistogramTest
{
    @Test
    public void testFindingCorrectBuckets()
    {
        EstimatedHistogram histogram = new EstimatedHistogram();

        histogram.add(0L);
        assertEquals(1, histogram.get(true)[0]);

        histogram.add(33282687);
        assertEquals(1, histogram.get(true)[histogram.buckets.length()-1]);

        histogram.add(1);
        assertEquals(1, histogram.get(true)[1]);

        histogram.add(9);
        assertEquals(1, histogram.get(true)[8]);

        histogram.add(23);
        histogram.add(24);
        histogram.add(25);
        assertEquals(3, histogram.get(true)[13]);
    }
}