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.Spliterator;
31 import java.util.stream.DoubleStream;
32 import java.util.stream.LongStream;
33
34 import static org.testng.Assert.assertEquals;
35 import static org.testng.Assert.assertFalse;
36 import static org.testng.Assert.assertTrue;
37
38 /**
39 * @test
40 * @bug 8153293
41 */
42 @Test
43 public class DoublePrimitiveOpsTests {
44
45 // @@@ tests for double are fragile if relying on equality when accumulating and multiplying values
46
47 public void testUnBox() {
48 double sum = Arrays.asList(1.0, 2.0, 3.0, 4.0, 5.0).stream().mapToDouble(i -> i).reduce(0.0, Double::sum);
49 assertEquals(sum, 1.0 + 2.0 + 3.0 + 4.0 + 5.0);
50 }
51
52 public void testFlags() {
53 assertTrue(LongStream.range(1, 10).asDoubleStream().boxed().spliterator()
54 .hasCharacteristics(Spliterator.SORTED));
55 assertFalse(DoubleStream.of(1, 10).boxed().spliterator()
56 .hasCharacteristics(Spliterator.SORTED));
57 }
58
59 public void testToArray() {
60 {
61 double[] array = LongStream.range(1, 10).asDoubleStream().map(i -> i * 2).toArray();
62 assertEquals(array, new double[]{2, 4, 6, 8, 10, 12, 14, 16, 18});
63 }
64
65 {
66 double[] array = LongStream.range(1, 10).parallel().asDoubleStream().map(i -> i * 2).toArray();
67 assertEquals(array, new double[]{2, 4, 6, 8, 10, 12, 14, 16, 18});
68 }
69 }
70
71 public void testSort() {
72 Random r = new Random();
73
74 double[] content = DoubleStream.generate(() -> r.nextDouble()).limit(10).toArray();
75 double[] sortedContent = content.clone();
76 Arrays.sort(sortedContent);
77
78 {
79 double[] array = Arrays.stream(content).sorted().toArray();
80 assertEquals(array, sortedContent);
81 }
82
83 {
84 double[] array = Arrays.stream(content).parallel().sorted().toArray();
85 assertEquals(array, sortedContent);
86 }
87 }
88
89 public void testSortDistinct() {
90 {
91 double[] range = LongStream.range(0, 10).asDoubleStream().toArray();
92
93 assertEquals(LongStream.range(0, 10).asDoubleStream().sorted().distinct().toArray(), range);
94 assertEquals(LongStream.range(0, 10).asDoubleStream().parallel().sorted().distinct().toArray(), range);
95
96 double[] data = {5, 3, 1, 1, 5, Double.NaN, 3, 9, Double.POSITIVE_INFINITY,
97 Double.NEGATIVE_INFINITY, 2, 9, 1, 0, 8, Double.NaN, -0.0};
98 double[] expected = {Double.NEGATIVE_INFINITY, -0.0, 0, 1, 2, 3, 5, 8, 9,
99 Double.POSITIVE_INFINITY, Double.NaN};
100 assertEquals(DoubleStream.of(data).sorted().distinct().toArray(), expected);
101 assertEquals(DoubleStream.of(data).parallel().sorted().distinct().toArray(), expected);
102 }
103 }
104
105 public void testSortSort() {
106 Random r = new Random();
107
108 double[] content = DoubleStream.generate(() -> r.nextDouble()).limit(10).toArray();
109 double[] sortedContent = content.clone();
110 Arrays.sort(sortedContent);
111
112 {
113 double[] array = Arrays.stream(content).sorted().sorted().toArray();
114 assertEquals(array, sortedContent);
115 }
116
117 {
118 double[] array = Arrays.stream(content).parallel().sorted().sorted().toArray();
119 assertEquals(array, sortedContent);
120 }
121 }
122
123 public void testLimit() {
124 double[] expected = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
125
126 {
127 double[] actual = DoubleStream.iterate(1.0, i -> i + 1.0).limit(9).toArray();
128 Assert.assertTrue(Arrays.equals(expected, actual));
129 }
130
131 {
132 double[] actual = LongStream.range(1, 100).parallel().asDoubleStream().limit(9).toArray();
133 Assert.assertTrue(Arrays.equals(expected, actual));
134 }
135 }
136 }