src/test/java/com/yahoo/sketches/hive/tuple/ArrayOfDoublesSketchToNumberOfRetainedEntriesUDFTest.java

/*
 * Copyright 2016, Yahoo! Inc.
 * Licensed under the terms of the Apache License 2.0. See LICENSE file at the project root for terms.
 */

package com.yahoo.sketches.hive.tuple;

import org.apache.hadoop.io.BytesWritable;
import org.testng.Assert;
import org.testng.annotations.Test;

import com.yahoo.sketches.tuple.ArrayOfDoublesUpdatableSketch;
import com.yahoo.sketches.tuple.ArrayOfDoublesUpdatableSketchBuilder;

@SuppressWarnings("javadoc")
public class ArrayOfDoublesSketchToNumberOfRetainedEntriesUDFTest {

  @Test
  public void nullSketch() {
    Integer result = new ArrayOfDoublesSketchToNumberOfRetainedEntriesUDF().evaluate(null);
    Assert.assertNull(result);
  }

  @Test
  public void emptySketch() {
    ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().build();
    Integer result = new ArrayOfDoublesSketchToNumberOfRetainedEntriesUDF().evaluate(new BytesWritable(sketch.compact().toByteArray()));
    Assert.assertNotNull(result);
    Assert.assertEquals((int) result, 0);
  }

  @Test
  public void normalCase() {
    ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().build();
    sketch.update(1, new double[] {0});
    Integer result = new ArrayOfDoublesSketchToNumberOfRetainedEntriesUDF().evaluate(new BytesWritable(sketch.compact().toByteArray()));
    Assert.assertNotNull(result);
    Assert.assertEquals((int) result, 1);
  }

}