| /* |
| * 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.quantiles; |
| |
| import static org.apache.datasketches.quantiles.PreambleUtil.COMBINED_BUFFER; |
| import static org.apache.datasketches.quantiles.Util.LS; |
| import static org.testng.Assert.assertEquals; |
| import static org.testng.Assert.assertNull; |
| import static org.testng.Assert.assertTrue; |
| |
| import org.testng.annotations.BeforeMethod; |
| import org.testng.annotations.Test; |
| |
| import org.apache.datasketches.memory.Memory; |
| import org.apache.datasketches.memory.WritableMemory; |
| import org.apache.datasketches.SketchesArgumentException; |
| |
| @SuppressWarnings("javadoc") |
| public class HeapCompactDoublesSketchTest { |
| |
| @BeforeMethod |
| public void setUp() { |
| DoublesSketch.rand.setSeed(32749); // make sketches deterministic for testing |
| } |
| |
| @Test |
| public void heapifyFromUpdateSketch() { |
| final int k = 4; |
| final int n = 45; |
| final UpdateDoublesSketch qs = buildAndLoadQS(k, n); |
| final byte[] qsBytes = qs.toByteArray(); |
| final Memory qsMem = Memory.wrap(qsBytes); |
| |
| final HeapCompactDoublesSketch compactQs = HeapCompactDoublesSketch.heapifyInstance(qsMem); |
| DoublesSketchTest.testSketchEquality(qs, compactQs); |
| |
| assertNull(compactQs.getMemory()); |
| } |
| |
| @Test |
| public void createFromUnsortedUpdateSketch() { |
| final int k = 4; |
| final int n = 13; |
| final UpdateDoublesSketch qs = DoublesSketch.builder().setK(k).build(); |
| for (int i = n; i > 0; --i) { |
| qs.update(i); |
| } |
| final HeapCompactDoublesSketch compactQs = HeapCompactDoublesSketch.createFromUpdateSketch(qs); |
| |
| // don't expect equal but new base buffer should be sorted |
| checkBaseBufferIsSorted(compactQs); |
| } |
| |
| @Test |
| public void heapifyFromCompactSketch() { |
| final int k = 8; |
| final int n = 177; |
| final UpdateDoublesSketch qs = buildAndLoadQS(k, n); // assuming reverse ordered inserts |
| |
| final byte[] qsBytes = qs.compact().toByteArray(); |
| final Memory qsMem = Memory.wrap(qsBytes); |
| |
| final HeapCompactDoublesSketch compactQs = HeapCompactDoublesSketch.heapifyInstance(qsMem); |
| DoublesSketchTest.testSketchEquality(qs, compactQs); |
| } |
| |
| @Test |
| public void checkHeapifyUnsortedCompactV2() { |
| final int k = 64; |
| final UpdateDoublesSketch qs = DoublesSketch.builder().setK(64).build(); |
| for (int i = 0; i < (3 * k); ++i) { |
| qs.update(i); |
| } |
| assertEquals(qs.getBaseBufferCount(), k); |
| final byte[] sketchBytes = qs.toByteArray(true); |
| final WritableMemory mem = WritableMemory.writableWrap(sketchBytes); |
| |
| // modify to make v2, clear compact flag, and insert a -1 in the middle of the base buffer |
| PreambleUtil.insertSerVer(mem, 2); |
| PreambleUtil.insertFlags(mem, 0); |
| final long tgtAddr = COMBINED_BUFFER + ((Double.BYTES * k) / 2); |
| mem.putDouble(tgtAddr, -1.0); |
| assert mem.getDouble(tgtAddr - Double.BYTES) > mem.getDouble(tgtAddr); |
| |
| // ensure the heapified base buffer is sorted |
| final HeapCompactDoublesSketch qs2 = HeapCompactDoublesSketch.heapifyInstance(mem); |
| checkBaseBufferIsSorted(qs2); |
| } |
| |
| @Test |
| public void checkEmpty() { |
| final int k = PreambleUtil.DEFAULT_K; |
| final UpdateDoublesSketch qs1 = buildAndLoadQS(k, 0); |
| final byte[] byteArr = qs1.compact().toByteArray(); |
| final byte[] byteArr2 = qs1.toByteArray(true); |
| final Memory mem = Memory.wrap(byteArr); |
| final HeapCompactDoublesSketch qs2 = HeapCompactDoublesSketch.heapifyInstance(mem); |
| assertTrue(qs2.isEmpty()); |
| assertEquals(byteArr.length, qs1.getStorageBytes()); |
| assertEquals(byteArr, byteArr2); |
| assertTrue(Double.isNaN(qs2.getQuantile(0.0))); |
| assertTrue(Double.isNaN(qs2.getQuantile(1.0))); |
| assertTrue(Double.isNaN(qs2.getQuantile(0.5))); |
| final double[] quantiles = qs2.getQuantiles(new double[] {0.0, 0.5, 1.0}); |
| assertNull(quantiles); |
| //println(qs1.toString(true, true)); |
| } |
| |
| @Test(expectedExceptions = SketchesArgumentException.class) |
| public void checkMemTooSmall1() { |
| final Memory mem = Memory.wrap(new byte[7]); |
| HeapCompactDoublesSketch.heapifyInstance(mem); |
| } |
| |
| static void checkBaseBufferIsSorted(HeapCompactDoublesSketch qs) { |
| final double[] combinedBuffer = qs.getCombinedBuffer(); |
| final int bbCount = qs.getBaseBufferCount(); |
| |
| for (int i = 1; i < bbCount; ++i) { |
| assert combinedBuffer[i - 1] <= combinedBuffer[i]; |
| } |
| } |
| |
| static UpdateDoublesSketch buildAndLoadQS(final int k, final int n) { |
| return buildAndLoadQS(k, n, 0); |
| } |
| |
| static UpdateDoublesSketch buildAndLoadQS(final int k, final int n, final int startV) { |
| final UpdateDoublesSketch qs = DoublesSketch.builder().setK(k).build(); |
| for (int i = 1; i <= n; i++) { |
| qs.update(startV + i); |
| } |
| return qs; |
| } |
| |
| @Test |
| public void printlnTest() { |
| println("PRINTING: " + this.getClass().getName()); |
| print("PRINTING: " + this.getClass().getName() + LS); |
| } |
| |
| /** |
| * @param s value to print |
| */ |
| static void println(final String s) { |
| print(s + LS); |
| } |
| |
| /** |
| * @param s value to print |
| */ |
| static void print(final String s) { |
| //System.err.print(s); //disable here |
| } |
| |
| } |