| /* |
| * 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.pig.tuple; |
| |
| import org.testng.annotations.Test; |
| import org.testng.Assert; |
| import org.apache.pig.EvalFunc; |
| import org.apache.pig.data.DataByteArray; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.data.TupleFactory; |
| |
| import com.yahoo.sketches.tuple.UpdatableSketch; |
| import com.yahoo.sketches.tuple.UpdatableSketchBuilder; |
| import com.yahoo.sketches.tuple.adouble.DoubleSummary; |
| import com.yahoo.sketches.tuple.adouble.DoubleSummaryFactory; |
| |
| public class DoubleSummarySketchToEstimatesTest { |
| @Test |
| public void nullInput() throws Exception { |
| EvalFunc<Tuple> func = new DoubleSummarySketchToEstimates(); |
| Tuple resultTuple = func.exec(null); |
| Assert.assertNull(resultTuple); |
| } |
| |
| @Test |
| public void emptyInput() throws Exception { |
| EvalFunc<Tuple> func = new DoubleSummarySketchToEstimates(); |
| Tuple resultTuple = func.exec(TupleFactory.getInstance().newTuple()); |
| Assert.assertNull(resultTuple); |
| } |
| |
| @Test |
| public void emptySketch() throws Exception { |
| EvalFunc<Tuple> func = new DoubleSummarySketchToEstimates(); |
| UpdatableSketch<Double, DoubleSummary> sketch = new UpdatableSketchBuilder<Double, DoubleSummary>(new DoubleSummaryFactory()).build(); |
| Tuple inputTuple = PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray())); |
| Tuple resultTuple = func.exec(inputTuple); |
| Assert.assertNotNull(resultTuple); |
| Assert.assertEquals(resultTuple.size(), 2); |
| Assert.assertEquals(resultTuple.get(0), 0.0); |
| Assert.assertEquals(resultTuple.get(0), 0.0); |
| } |
| |
| @Test |
| public void normalCase() throws Exception { |
| EvalFunc<Tuple> func = new DoubleSummarySketchToEstimates(); |
| UpdatableSketch<Double, DoubleSummary> sketch = new UpdatableSketchBuilder<Double, DoubleSummary>(new DoubleSummaryFactory()).build(); |
| int iterations = 100000; |
| for (int i = 0; i < iterations; i++) sketch.update(i, 1.0); |
| for (int i = 0; i < iterations; i++) sketch.update(i, 1.0); |
| Tuple inputTuple = PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray())); |
| Tuple resultTuple = func.exec(inputTuple); |
| Assert.assertNotNull(resultTuple); |
| Assert.assertEquals(resultTuple.size(), 2); |
| Assert.assertEquals((double) resultTuple.get(0), iterations, iterations * 0.03); |
| Assert.assertEquals((double) resultTuple.get(1), 2 * iterations, 2 * iterations * 0.03); |
| } |
| } |