| /* |
| * 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.tuple.adouble; |
| |
| import java.util.Random; |
| |
| import org.apache.datasketches.tuple.Filter; |
| import org.apache.datasketches.tuple.Sketch; |
| import org.apache.datasketches.tuple.Sketches; |
| import org.apache.datasketches.tuple.UpdatableSketch; |
| import org.apache.datasketches.tuple.UpdatableSketchBuilder; |
| import org.apache.datasketches.tuple.adouble.DoubleSummary.Mode; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| |
| @SuppressWarnings("javadoc") |
| public class FilterTest { |
| private static final int numberOfElements = 100; |
| private static final Random random = new Random(1);//deterministic for this class |
| private final DoubleSummary.Mode mode = Mode.Sum; |
| |
| @Test |
| public void emptySketch() { |
| final Sketch<DoubleSummary> sketch = Sketches.createEmptySketch(); |
| |
| final Filter<DoubleSummary> filter = new Filter<>(o -> true); |
| |
| final Sketch<DoubleSummary> filteredSketch = filter.filter(sketch); |
| |
| Assert.assertEquals(filteredSketch.getEstimate(), 0.0); |
| Assert.assertEquals(filteredSketch.getThetaLong(), sketch.getThetaLong()); |
| Assert.assertTrue(filteredSketch.isEmpty()); |
| Assert.assertEquals(filteredSketch.getLowerBound(1), 0.0); |
| Assert.assertEquals(filteredSketch.getUpperBound(1), 0.0); |
| } |
| |
| @Test |
| public void nullSketch() { |
| final Filter<DoubleSummary> filter = new Filter<>(o -> true); |
| |
| final Sketch<DoubleSummary> filteredSketch = filter.filter(null); |
| |
| Assert.assertEquals(filteredSketch.getEstimate(), 0.0); |
| Assert.assertEquals(filteredSketch.getThetaLong(), Long.MAX_VALUE); |
| Assert.assertTrue(filteredSketch.isEmpty()); |
| Assert.assertEquals(filteredSketch.getLowerBound(1), 0.0); |
| Assert.assertEquals(filteredSketch.getUpperBound(1), 0.0); |
| } |
| |
| @Test |
| public void filledSketchShouldBehaveTheSame() { |
| final UpdatableSketch<Double, DoubleSummary> sketch = |
| new UpdatableSketchBuilder<>(new DoubleSummaryFactory(mode)).build(); |
| |
| fillSketch(sketch, numberOfElements, 0.0); |
| |
| final Filter<DoubleSummary> filter = new Filter<>(o -> true); |
| |
| final Sketch<DoubleSummary> filteredSketch = filter.filter(sketch); |
| |
| Assert.assertEquals(filteredSketch.getEstimate(), sketch.getEstimate()); |
| Assert.assertEquals(filteredSketch.getThetaLong(), sketch.getThetaLong()); |
| Assert.assertFalse(filteredSketch.isEmpty()); |
| Assert.assertEquals(filteredSketch.getLowerBound(1), sketch.getLowerBound(1)); |
| Assert.assertEquals(filteredSketch.getUpperBound(1), sketch.getUpperBound(1)); |
| } |
| |
| @Test |
| public void filledSketchShouldFilterOutElements() { |
| final UpdatableSketch<Double, DoubleSummary> sketch = |
| new UpdatableSketchBuilder<>(new DoubleSummaryFactory(mode)).build(); |
| |
| fillSketch(sketch, numberOfElements, 0.0); |
| fillSketch(sketch, 2 * numberOfElements, 1.0); |
| |
| final Filter<DoubleSummary> filter = new Filter<>(o -> o.getValue() < 0.5); |
| |
| final Sketch<DoubleSummary> filteredSketch = filter.filter(sketch); |
| |
| Assert.assertEquals(filteredSketch.getEstimate(), numberOfElements); |
| Assert.assertEquals(filteredSketch.getThetaLong(), sketch.getThetaLong()); |
| Assert.assertFalse(filteredSketch.isEmpty()); |
| Assert.assertTrue(filteredSketch.getLowerBound(1) <= filteredSketch.getEstimate()); |
| Assert.assertTrue(filteredSketch.getUpperBound(1) >= filteredSketch.getEstimate()); |
| } |
| |
| @Test |
| public void filteringInEstimationMode() { |
| final UpdatableSketch<Double, DoubleSummary> sketch = |
| new UpdatableSketchBuilder<>(new DoubleSummaryFactory(mode)).build(); |
| |
| final int n = 10000; |
| fillSketch(sketch, n, 0.0); |
| fillSketch(sketch, 2 * n, 1.0); |
| |
| final Filter<DoubleSummary> filter = new Filter<>(o -> o.getValue() < 0.5); |
| |
| final Sketch<DoubleSummary> filteredSketch = filter.filter(sketch); |
| |
| Assert.assertEquals(filteredSketch.getEstimate(), n, n * 0.05); |
| Assert.assertEquals(filteredSketch.getThetaLong(), sketch.getThetaLong()); |
| Assert.assertFalse(filteredSketch.isEmpty()); |
| Assert.assertTrue(filteredSketch.getLowerBound(1) <= filteredSketch.getEstimate()); |
| Assert.assertTrue(filteredSketch.getUpperBound(1) >= filteredSketch.getEstimate()); |
| } |
| |
| @Test |
| public void nonEmptySketchWithNoEntries() { |
| final UpdatableSketch<Double, DoubleSummary> sketch = |
| new UpdatableSketchBuilder<>( |
| new DoubleSummaryFactory(mode)).setSamplingProbability(0.0001f).build(); |
| sketch.update(0, 0.0); |
| |
| Assert.assertFalse(sketch.isEmpty()); |
| Assert.assertEquals(sketch.getRetainedEntries(), 0); |
| |
| final Filter<DoubleSummary> filter = new Filter<>(o -> true); |
| |
| final Sketch<DoubleSummary> filteredSketch = filter.filter(sketch); |
| |
| Assert.assertFalse(filteredSketch.isEmpty()); |
| Assert.assertEquals(filteredSketch.getEstimate(), sketch.getEstimate()); |
| Assert.assertEquals(filteredSketch.getThetaLong(), sketch.getThetaLong()); |
| Assert.assertEquals(filteredSketch.getLowerBound(1), sketch.getLowerBound(1)); |
| Assert.assertEquals(filteredSketch.getUpperBound(1), sketch.getUpperBound(1)); |
| } |
| |
| private static void fillSketch(final UpdatableSketch<Double, DoubleSummary> sketch, |
| final int numberOfElements, final Double sketchValue) { |
| |
| |
| for (int cont = 0; cont < numberOfElements; cont++) { |
| sketch.update(random.nextLong(), sketchValue); |
| } |
| } |
| } |