1 /* 2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.openjdk.tests.java.util.stream; 24 25 import org.testng.Assert; 26 import org.testng.annotations.Test; 27 28 import java.util.Arrays; 29 import java.util.Random; 30 import java.util.stream.DoubleStream; 31 import java.util.stream.LongStream; 32 33 import static org.testng.Assert.assertEquals; 34 35 @Test 36 public class DoublePrimitiveOpsTests { 37 38 // @@@ tests for double are fragile if relying on equality when accumulating and multiplying values 39 testUnBox()40 public void testUnBox() { 41 double sum = Arrays.asList(1.0, 2.0, 3.0, 4.0, 5.0).stream().mapToDouble(i -> i).reduce(0.0, Double::sum); 42 assertEquals(sum, 1.0 + 2.0 + 3.0 + 4.0 + 5.0); 43 } 44 testToArray()45 public void testToArray() { 46 { 47 double[] array = LongStream.range(1, 10).asDoubleStream().map(i -> i * 2).toArray(); 48 assertEquals(array, new double[]{2, 4, 6, 8, 10, 12, 14, 16, 18}); 49 } 50 51 { 52 double[] array = LongStream.range(1, 10).parallel().asDoubleStream().map(i -> i * 2).toArray(); 53 assertEquals(array, new double[]{2, 4, 6, 8, 10, 12, 14, 16, 18}); 54 } 55 } 56 testSort()57 public void testSort() { 58 Random r = new Random(); 59 60 double[] content = DoubleStream.generate(() -> r.nextDouble()).limit(10).toArray(); 61 double[] sortedContent = content.clone(); 62 Arrays.sort(sortedContent); 63 64 { 65 double[] array = Arrays.stream(content).sorted().toArray(); 66 assertEquals(array, sortedContent); 67 } 68 69 { 70 double[] array = Arrays.stream(content).parallel().sorted().toArray(); 71 assertEquals(array, sortedContent); 72 } 73 } 74 testSortSort()75 public void testSortSort() { 76 Random r = new Random(); 77 78 double[] content = DoubleStream.generate(() -> r.nextDouble()).limit(10).toArray(); 79 double[] sortedContent = content.clone(); 80 Arrays.sort(sortedContent); 81 82 { 83 double[] array = Arrays.stream(content).sorted().sorted().toArray(); 84 assertEquals(array, sortedContent); 85 } 86 87 { 88 double[] array = Arrays.stream(content).parallel().sorted().sorted().toArray(); 89 assertEquals(array, sortedContent); 90 } 91 } 92 testLimit()93 public void testLimit() { 94 double[] expected = { 1, 2, 3, 4, 5, 6, 7, 8, 9 }; 95 96 { 97 double[] actual = DoubleStream.iterate(1.0, i -> i + 1.0).limit(9).toArray(); 98 Assert.assertTrue(Arrays.equals(expected, actual)); 99 } 100 101 { 102 double[] actual = LongStream.range(1, 100).parallel().asDoubleStream().limit(9).toArray(); 103 Assert.assertTrue(Arrays.equals(expected, actual)); 104 } 105 } 106 } 107