| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.datasketches.pig.tuple; |
| |
| import java.util.Random; |
| |
| import org.apache.pig.EvalFunc; |
| import org.apache.pig.data.DataByteArray; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.data.TupleFactory; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| |
| import org.apache.datasketches.tuple.ArrayOfDoublesUpdatableSketch; |
| import org.apache.datasketches.tuple.ArrayOfDoublesUpdatableSketchBuilder; |
| |
| @SuppressWarnings("javadoc") |
| public class ArrayOfDoublesSketchToMeansTest { |
| |
| @Test |
| public void nullInput() throws Exception { |
| EvalFunc<Tuple> func = new ArrayOfDoublesSketchToMeans(); |
| Tuple resultTuple = func.exec(null); |
| Assert.assertNull(resultTuple); |
| } |
| |
| @Test |
| public void emptyInputTuple() throws Exception { |
| EvalFunc<Tuple> func = new ArrayOfDoublesSketchToMeans(); |
| Tuple resultTuple = func.exec(TupleFactory.getInstance().newTuple()); |
| Assert.assertNull(resultTuple); |
| } |
| |
| @Test |
| public void emptyInputSketch() throws Exception { |
| EvalFunc<Tuple> func = new ArrayOfDoublesSketchToMeans(); |
| ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().build(); |
| Tuple inputTuple = PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray())); |
| Tuple resultTuple = func.exec(inputTuple); |
| Assert.assertNull(resultTuple); |
| } |
| |
| @Test |
| public void oneEntryInputSketch() throws Exception { |
| EvalFunc<Tuple> func = new ArrayOfDoublesSketchToMeans(); |
| ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().build(); |
| sketch.update(1, new double[] {1}); |
| Tuple inputTuple = PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray())); |
| Tuple resultTuple = func.exec(inputTuple); |
| Assert.assertNotNull(resultTuple); |
| Assert.assertEquals(resultTuple.size(), 1); |
| Assert.assertEquals(resultTuple.get(0), 1.0); |
| } |
| |
| @Test |
| public void manyEntriesTwoValuesInputSketch() throws Exception { |
| EvalFunc<Tuple> func = new ArrayOfDoublesSketchToMeans(); |
| ArrayOfDoublesUpdatableSketch sketch = new ArrayOfDoublesUpdatableSketchBuilder().setNumberOfValues(2).build(); |
| Random rand = new Random(0); |
| int numKeys = 10000; // to saturate the sketch with default number of nominal entries (4K) |
| for (int i = 0; i < numKeys; i++ ) { |
| // two random values normally distributed with means of 0 and 1 |
| sketch.update(i, new double[] {rand.nextGaussian(), rand.nextGaussian() + 1.0}); |
| } |
| Assert.assertTrue(sketch.getRetainedEntries() >= 4096); |
| 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), 0.0, 0.04); |
| Assert.assertEquals((double) resultTuple.get(1), 1.0, 0.04); |
| } |
| |
| } |