| /******************************************************************************* |
| * Copyright 2015, 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.theta; |
| |
| import org.apache.hadoop.io.BytesWritable; |
| import org.testng.annotations.Test; |
| |
| import com.yahoo.sketches.hive.theta.EstimateSketchUDF; |
| |
| import com.yahoo.sketches.theta.CompactSketch; |
| import com.yahoo.sketches.theta.UpdateSketch; |
| import com.yahoo.sketches.theta.Sketches; |
| import static org.testng.AssertJUnit.assertEquals; |
| |
| @SuppressWarnings("javadoc") |
| public class EstimateSketchUDFTest { |
| |
| @Test |
| public void evaluateNull() { |
| EstimateSketchUDF testObject = new EstimateSketchUDF(); |
| |
| Double testResult = testObject.evaluate(null); |
| |
| assertEquals(testResult, 0.0); |
| } |
| |
| @Test |
| public void evaluateEmptyInput() { |
| EstimateSketchUDF testObject = new EstimateSketchUDF(); |
| |
| BytesWritable testInput = new BytesWritable(); |
| |
| Double testResult = testObject.evaluate(testInput); |
| |
| assertEquals(testResult, 0.0); |
| } |
| |
| @Test |
| public void evaluateValid() { |
| EstimateSketchUDF testObject = new EstimateSketchUDF(); |
| |
| UpdateSketch sketch = Sketches.updateSketchBuilder().setNominalEntries(1024).build(); |
| for (int i = 0; i<128; i++) { |
| sketch.update(i); |
| } |
| |
| BytesWritable input = new BytesWritable(sketch.toByteArray()); |
| |
| Double testResult = testObject.evaluate(input); |
| |
| assertEquals(128.0, testResult); |
| |
| CompactSketch compactSketch = sketch.compact(false, null); |
| input = new BytesWritable(compactSketch.toByteArray()); |
| |
| testResult = testObject.evaluate(input); |
| |
| assertEquals(128.0, testResult); |
| } |
| |
| @Test |
| public void evaluateValidExplicitSeed() { |
| EstimateSketchUDF testObject = new EstimateSketchUDF(); |
| |
| final long seed = 1; |
| UpdateSketch sketch = Sketches.updateSketchBuilder().setSeed(seed).setNominalEntries(1024).build(); |
| for (int i = 0; i<128; i++) { |
| sketch.update(i); |
| } |
| |
| BytesWritable input = new BytesWritable(sketch.toByteArray()); |
| |
| Double testResult = testObject.evaluate(input, seed); |
| |
| assertEquals(128.0, testResult); |
| |
| CompactSketch compactSketch = sketch.compact(false, null); |
| input = new BytesWritable(compactSketch.toByteArray()); |
| |
| testResult = testObject.evaluate(input, seed); |
| |
| assertEquals(128.0, testResult); |
| } |
| |
| } |