src/test/java/org/apache/datasketches/tuple/arrayofdoubles/ArrayOfDoublesCompactSketchTest.java

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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 *   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.datasketches.tuple.arrayofdoubles;

import org.apache.datasketches.memory.Memory;
import org.apache.datasketches.memory.WritableMemory;
import org.testng.Assert;
import org.testng.annotations.Test;

@SuppressWarnings("javadoc")
public class ArrayOfDoublesCompactSketchTest {
  @Test
  public void heapToDirectExactTwoDoubles() {
    ArrayOfDoublesUpdatableSketch sketch1 = new ArrayOfDoublesUpdatableSketchBuilder().setNumberOfValues(2).build();
    sketch1.update("a", new double[] {1, 2});
    sketch1.update("b", new double[] {1, 2});
    sketch1.update("c", new double[] {1, 2});
    sketch1.update("d", new double[] {1, 2});
    sketch1.update("a", new double[] {1, 2});
    sketch1.update("b", new double[] {1, 2});
    sketch1.update("c", new double[] {1, 2});
    sketch1.update("d", new double[] {1, 2});
    ArrayOfDoublesSketch sketch2 = new DirectArrayOfDoublesCompactSketch(Memory.wrap(sketch1.compact().toByteArray()));
    Assert.assertFalse(sketch2.isEmpty());
    Assert.assertFalse(sketch2.isEstimationMode());
    Assert.assertEquals(sketch2.getEstimate(), 4.0);
    Assert.assertEquals(sketch2.getUpperBound(1), 4.0);
    Assert.assertEquals(sketch2.getLowerBound(1), 4.0);
    Assert.assertEquals(sketch2.getThetaLong(), Long.MAX_VALUE);
    Assert.assertEquals(sketch2.getTheta(), 1.0);
    double[][] values = sketch2.getValues();
    Assert.assertEquals(values.length, 4);
    for (double[] array: values) {
      Assert.assertEquals(array.length, 2);
      Assert.assertEquals(array[0], 2.0);
      Assert.assertEquals(array[1], 4.0);
    }
  }

  @Test
  public void directToHeapExactTwoDoubles() {
    ArrayOfDoublesUpdatableSketch sketch1 = 
        new ArrayOfDoublesUpdatableSketchBuilder().setNumberOfValues(2).build(WritableMemory.writableWrap(new byte[1000000]));
    sketch1.update("a", new double[] {1, 2});
    sketch1.update("b", new double[] {1, 2});
    sketch1.update("c", new double[] {1, 2});
    sketch1.update("d", new double[] {1, 2});
    sketch1.update("a", new double[] {1, 2});
    sketch1.update("b", new double[] {1, 2});
    sketch1.update("c", new double[] {1, 2});
    sketch1.update("d", new double[] {1, 2});
    ArrayOfDoublesSketch sketch2 = 
        new HeapArrayOfDoublesCompactSketch(Memory.wrap(sketch1.compact(WritableMemory.writableWrap(new byte[1000000])).toByteArray()));
    Assert.assertFalse(sketch2.isEmpty());
    Assert.assertFalse(sketch2.isEstimationMode());
    Assert.assertEquals(sketch2.getEstimate(), 4.0);
    Assert.assertEquals(sketch2.getUpperBound(1), 4.0);
    Assert.assertEquals(sketch2.getLowerBound(1), 4.0);
    Assert.assertEquals(sketch2.getThetaLong(), Long.MAX_VALUE);
    Assert.assertEquals(sketch2.getTheta(), 1.0);
    double[][] values = sketch2.getValues();
    Assert.assertEquals(values.length, 4);
    for (double[] array: values) {
      Assert.assertEquals(array.length, 2);
      Assert.assertEquals(array[0], 2.0);
      Assert.assertEquals(array[1], 4.0);
    }
  }
}