| /* |
| * Copyright 2019, Verizon Media. |
| * Licensed under the terms of the Apache License 2.0. See LICENSE file at the project root for terms. |
| */ |
| |
| package com.yahoo.sketches.hive.quantiles; |
| |
| import java.util.Comparator; |
| import java.util.List; |
| |
| import org.apache.hadoop.io.BytesWritable; |
| |
| import org.testng.annotations.Test; |
| import org.testng.Assert; |
| |
| import com.yahoo.sketches.ArrayOfItemsSerDe; |
| import com.yahoo.sketches.ArrayOfStringsSerDe; |
| import com.yahoo.sketches.quantiles.ItemsSketch; |
| |
| @SuppressWarnings("javadoc") |
| public class GetCdfFromStringsSketchUDFTest { |
| |
| static final Comparator<String> comparator = Comparator.naturalOrder(); |
| static final ArrayOfItemsSerDe<String> serDe = new ArrayOfStringsSerDe(); |
| |
| @Test |
| public void nullSketch() { |
| List<Double> result = new GetCdfFromStringsSketchUDF().evaluate(null, ""); |
| Assert.assertNull(result); |
| } |
| |
| @Test |
| public void emptyListOfSplitPoints() { |
| ItemsSketch<String> sketch = ItemsSketch.getInstance(comparator); |
| sketch.update("a"); |
| sketch.update("b"); |
| sketch.update("c"); |
| List<Double> result = new GetCdfFromStringsSketchUDF().evaluate(new BytesWritable(sketch.toByteArray(serDe))); |
| Assert.assertNotNull(result); |
| Assert.assertEquals(result.size(), 1); |
| Assert.assertEquals(result.get(0), 1.0); |
| } |
| |
| @Test |
| public void emptySketch() { |
| ItemsSketch<String> sketch = ItemsSketch.getInstance(comparator); |
| List<Double> result = new GetCdfFromStringsSketchUDF().evaluate(new BytesWritable(sketch.toByteArray(serDe)), "a"); |
| Assert.assertNull(result); |
| } |
| |
| @Test |
| public void normalCase() { |
| ItemsSketch<String> sketch = ItemsSketch.getInstance(comparator); |
| sketch.update("a"); |
| sketch.update("b"); |
| sketch.update("c"); |
| sketch.update("d"); |
| List<Double> result = new GetCdfFromStringsSketchUDF().evaluate(new BytesWritable(sketch.toByteArray(serDe)), "a", "c", "d"); |
| Assert.assertNotNull(result); |
| Assert.assertEquals(result.size(), 4); |
| Assert.assertEquals(result.get(0), 0.0); |
| Assert.assertEquals(result.get(1), 0.5); |
| Assert.assertEquals(result.get(2), 0.75); |
| Assert.assertEquals(result.get(3), 1.0); |
| } |
| |
| } |