1 /*
2 * Copyright (c) 2012, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package org.openjdk.tests.java.util.stream;
26
27 import java.util.*;
28 import java.util.function.BiConsumer;
29 import java.util.stream.*;
30
31 import org.testng.annotations.Test;
32
33 import java.util.function.Function;
34
35 import static java.util.stream.LambdaTestHelpers.*;
36
37
38 /**
39 * FindAnyOpTest
40 */
41 @Test
42 public class FindAnyOpTest extends OpTestCase {
43
44 public void testFindAny() {
45 assertFalse(Collections.emptySet().stream().findAny().isPresent(), "no result");
46 assertFalse(countTo(10).stream().filter(x -> x > 10).findAny().isPresent(), "no result");
47 assertTrue(countTo(10).stream().filter(pEven).findAny().isPresent(), "with result");
48 }
49
50 public void testFindAnyParallel() {
51 assertFalse(Collections.emptySet().parallelStream().findAny().isPresent(), "no result");
52 assertFalse(countTo(1000).parallelStream().filter(x -> x > 1000).findAny().isPresent(), "no result");
53 assertTrue(countTo(1000).parallelStream().filter(pEven).findAny().isPresent(), "with result");
54 }
55
56 @Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class)
57 public void testStream(String name, TestData.OfRef<Integer> data) {
58 exerciseStream(data, s -> s);
59 exerciseStream(data, s -> s.filter(pTrue));
60 exerciseStream(data, s -> s.filter(pFalse));
61 exerciseStream(data, s -> s.filter(pEven));
62 }
63
64 void exerciseStream(TestData.OfRef<Integer> data, Function<Stream<Integer>, Stream<Integer>> fs) {
65 Optional<Integer> or = withData(data).terminal(fs, s -> s.findAny()).equalator(VALID_ANSWER).exercise();
66 if (or.isPresent()) {
67 Integer r = or.get();
68 Iterator<Integer> it = fs.apply(data.stream()).iterator();
69 boolean contained = false;
70 while (!contained && it.hasNext()) {
71 contained = Objects.equals(r, it.next());
72 }
73 assertTrue(contained);
74 }
75 else {
76 assertFalse(fs.apply(data.stream()).iterator().hasNext());
77 }
78 }
79
80 @Test(dataProvider = "IntStreamTestData", dataProviderClass = IntStreamTestDataProvider.class)
81 public void testIntStream(String name, TestData.OfInt data) {
82 exerciseIntStream(data, s -> s);
83 exerciseIntStream(data, s -> s.filter(ipTrue));
84 exerciseIntStream(data, s -> s.filter(ipFalse));
85 exerciseIntStream(data, s -> s.filter(ipEven));
86 }
87
88 void exerciseIntStream(TestData.OfInt data, Function<IntStream, IntStream> fs) {
89 OptionalInt or = withData(data).terminal(fs, s -> s.findAny()).equalator(INT_VALID_ANSWER).exercise();
90 if (or.isPresent()) {
91 int r = or.getAsInt();
92 PrimitiveIterator.OfInt it = fs.apply(data.stream()).iterator();
93 boolean contained = false;
94 while (!contained && it.hasNext()) {
95 contained = r == it.nextInt();
96 }
97 assertTrue(contained);
98 }
99 else {
100 assertFalse(fs.apply(data.stream()).iterator().hasNext());
101 }
102 }
103
104 @Test(dataProvider = "LongStreamTestData", dataProviderClass = LongStreamTestDataProvider.class)
105 public void testLongStream(String name, TestData.OfLong data) {
106 exerciseLongStream(data, s -> s);
107 exerciseLongStream(data, s -> s.filter(lpTrue));
108 exerciseLongStream(data, s -> s.filter(lpFalse));
109 exerciseLongStream(data, s -> s.filter(lpEven));
110 }
111
112 void exerciseLongStream(TestData.OfLong data, Function<LongStream, LongStream> fs) {
113 OptionalLong or = withData(data).terminal(fs, s -> s.findAny()).equalator(LONG_VALID_ANSWER).exercise();
114 if (or.isPresent()) {
115 long r = or.getAsLong();
116 PrimitiveIterator.OfLong it = fs.apply(data.stream()).iterator();
117 boolean contained = false;
118 while (!contained && it.hasNext()) {
119 contained = r == it.nextLong();
120 }
121 assertTrue(contained);
122 }
123 else {
124 assertFalse(fs.apply(data.stream()).iterator().hasNext());
125 }
126 }
127
128 @Test(dataProvider = "DoubleStreamTestData", dataProviderClass = DoubleStreamTestDataProvider.class)
129 public void testDoubleStream(String name, TestData.OfDouble data) {
130 exerciseDoubleStream(data, s -> s);
131 exerciseDoubleStream(data, s -> s.filter(dpTrue));
132 exerciseDoubleStream(data, s -> s.filter(dpEven));
133 exerciseDoubleStream(data, s -> s.filter(dpFalse));
134 }
135
136 void exerciseDoubleStream(TestData.OfDouble data, Function<DoubleStream, DoubleStream> fs) {
137 OptionalDouble or = withData(data).terminal(fs, s -> s.findAny()).equalator(DOUBLE_VALID_ANSWER).exercise();
138 if (or.isPresent()) {
139 double r = or.getAsDouble();
140 PrimitiveIterator.OfDouble it = fs.apply(data.stream()).iterator();
141 boolean contained = false;
142 while (!contained && it.hasNext()) {
143 contained = r == it.nextDouble();
144 }
145 assertTrue(contained);
146 }
147 else {
148 assertFalse(fs.apply(data.stream()).iterator().hasNext());
149 }
150 }
151
152 static final BiConsumer<Optional<Integer>, Optional<Integer>> VALID_ANSWER = (a, b) -> assertEquals(a.isPresent(), b.isPresent());
153
154 static final BiConsumer<OptionalInt, OptionalInt> INT_VALID_ANSWER = (a, b) -> assertEquals(a.isPresent(), b.isPresent());
155
156 static final BiConsumer<OptionalLong, OptionalLong> LONG_VALID_ANSWER = (a, b) -> assertEquals(a.isPresent(), b.isPresent());
157
158 static final BiConsumer<OptionalDouble, OptionalDouble> DOUBLE_VALID_ANSWER = (a, b) -> assertEquals(a.isPresent(), b.isPresent());
159 }