| /* |
| * 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.hive.hll; |
| |
| import org.apache.datasketches.hive.common.BytesWritableHelper; |
| import org.apache.hadoop.io.BytesWritable; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| |
| import org.apache.datasketches.hll.HllSketch; |
| import org.apache.datasketches.hll.TgtHllType; |
| |
| @SuppressWarnings("javadoc") |
| public class UnionSketchUDFTest { |
| |
| @Test |
| public void nullInputs() { |
| UnionSketchUDF udf = new UnionSketchUDF(); |
| BytesWritable result = udf.evaluate(null, null); |
| HllSketch resultSketch = HllSketch.heapify(BytesWritableHelper.wrapAsMemory(result)); |
| Assert.assertTrue(resultSketch.isEmpty()); |
| Assert.assertEquals(resultSketch.getEstimate(), 0.0); |
| } |
| |
| @Test |
| public void validSketches() { |
| UnionSketchUDF udf = new UnionSketchUDF(); |
| |
| HllSketch sketch1 = new HllSketch(SketchEvaluator.DEFAULT_LG_K); |
| for (int i = 0; i < 128; i++) { |
| sketch1.update(i); |
| } |
| |
| HllSketch sketch2 = new HllSketch(SketchEvaluator.DEFAULT_LG_K); |
| for (int i = 100; i < 256; i++) { |
| sketch2.update(i); |
| } |
| |
| BytesWritable input1 = new BytesWritable(sketch1.toCompactByteArray()); |
| BytesWritable input2 = new BytesWritable(sketch2.toCompactByteArray()); |
| |
| BytesWritable result = udf.evaluate(input1, input2); |
| |
| HllSketch resultSketch = HllSketch.heapify(BytesWritableHelper.wrapAsMemory(result)); |
| |
| Assert.assertEquals(resultSketch.getEstimate(), 256.0, 256 * 0.01); |
| } |
| |
| @Test |
| public void validSketchesExplicitParams () { |
| UnionSketchUDF udf = new UnionSketchUDF(); |
| |
| final int lgK = 10; |
| final TgtHllType type = TgtHllType.HLL_6; |
| |
| HllSketch sketch1 = new HllSketch(10); |
| for (int i = 0; i < 128; i++) { |
| sketch1.update(i); |
| } |
| |
| HllSketch sketch2 = new HllSketch(10); |
| for (int i = 100; i < 256; i++) { |
| sketch2.update(i); |
| } |
| |
| BytesWritable input1 = new BytesWritable(sketch1.toCompactByteArray()); |
| BytesWritable input2 = new BytesWritable(sketch2.toCompactByteArray()); |
| |
| BytesWritable result = udf.evaluate(input1, input2, lgK, type.toString()); |
| |
| HllSketch resultSketch = HllSketch.heapify(BytesWritableHelper.wrapAsMemory(result)); |
| |
| Assert.assertEquals(resultSketch.getLgConfigK(), lgK); |
| Assert.assertEquals(resultSketch.getTgtHllType(), type); |
| Assert.assertEquals(resultSketch.getEstimate(), 256.0, 256 * 0.02); |
| } |
| |
| } |