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.
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 java.util.*;
26 import java.util.stream.*;
27
28 import org.testng.annotations.Test;
29
30 import java.util.function.Function;
31
32 import static java.util.stream.LambdaTestHelpers.*;
33
34
35 /**
36 * FindFirstOpTest
37 */
38 @Test
39 public class FindFirstOpTest extends OpTestCase {
40
41 public void testFindFirst() {
42 assertFalse(Collections.emptySet().stream().findFirst().isPresent(), "no result");
43 assertFalse(countTo(10).stream().filter(x -> x > 10).findFirst().isPresent(), "no result");
44
45 exerciseOps(countTo(1000), s -> Arrays.asList(new Integer[]{s.filter(pEven).findFirst().get()}).stream(), Arrays.asList(2));
46 exerciseOps(countTo(1000), s -> Arrays.asList(new Integer[]{s.findFirst().get()}).stream(), Arrays.asList(1));
47 exerciseOps(countTo(1000), s -> Arrays.asList(new Integer[]{s.filter(e -> e == 499).findFirst().get()}).stream(), Arrays.asList(499));
48 exerciseOps(countTo(1000), s -> Arrays.asList(new Integer[]{s.filter(e -> e == 999).findFirst().get()}).stream(), Arrays.asList(999));
49 exerciseOps(countTo(0), s -> Arrays.asList(new Integer[]{s.findFirst().orElse(-1)}).stream(), Arrays.asList(-1));
50 exerciseOps(countTo(1000), s -> Arrays.asList(new Integer[]{s.filter(e -> e == 1499).findFirst().orElse(-1)}).stream(), Arrays.asList(-1));
51 }
52
53 @Test(dataProvider = "StreamTestData<Integer>", dataProviderClass = StreamTestDataProvider.class)
54 public void testStream(String name, TestData.OfRef<Integer> data) {
55 exerciseStream(data, s -> s);
56 exerciseStream(data, s -> s.filter(pTrue));
57 exerciseStream(data, s -> s.filter(pFalse));
58 exerciseStream(data, s -> s.filter(pEven));
59 }
60
61 void exerciseStream(TestData.OfRef<Integer> data, Function<Stream<Integer>, Stream<Integer>> fs) {
62 Optional<Integer> r = exerciseTerminalOps(data, fs, s -> s.findFirst());
63 if (r.isPresent()) {
64 Iterator<Integer> i = fs.apply(data.stream()).iterator();
65 assertTrue(i.hasNext());
66 assertEquals(i.next(), r.get());
67 }
68 else {
69 assertFalse(fs.apply(data.stream()).iterator().hasNext());
70 }
71 }
72
73 @Test(dataProvider = "IntStreamTestData", dataProviderClass = IntStreamTestDataProvider.class)
74 public void testIntStream(String name, TestData.OfInt data) {
75 exerciseIntStream(data, s -> s);
76 exerciseIntStream(data, s -> s.filter(ipTrue));
77 exerciseIntStream(data, s -> s.filter(ipFalse));
78 exerciseIntStream(data, s -> s.filter(ipEven));
79 }
80
81 void exerciseIntStream(TestData.OfInt data, Function<IntStream, IntStream> fs) {
82 OptionalInt r = exerciseTerminalOps(data, fs, s -> s.findFirst());
83 if (r.isPresent()) {
84 PrimitiveIterator.OfInt i = fs.apply(data.stream()).iterator();
85 assertTrue(i.hasNext());
86 assertEquals(i.nextInt(), r.getAsInt());
87 }
88 else {
89 assertFalse(fs.apply(data.stream()).iterator().hasNext());
90 }
91 }
92
93 @Test(dataProvider = "LongStreamTestData", dataProviderClass = LongStreamTestDataProvider.class)
94 public void testLongStream(String name, TestData.OfLong data) {
95 exerciseLongStream(data, s -> s);
96 exerciseLongStream(data, s -> s.filter(lpTrue));
97 exerciseLongStream(data, s -> s.filter(lpFalse));
98 exerciseLongStream(data, s -> s.filter(lpEven));
99 }
100
101 void exerciseLongStream(TestData.OfLong data, Function<LongStream, LongStream> fs) {
102 OptionalLong r = exerciseTerminalOps(data, fs, s -> s.findFirst());
103 if (r.isPresent()) {
104 PrimitiveIterator.OfLong i = fs.apply(data.stream()).iterator();
105 assertTrue(i.hasNext());
106 assertEquals(i.nextLong(), r.getAsLong());
107 }
108 else {
109 assertFalse(fs.apply(data.stream()).iterator().hasNext());
110 }
111 }
112
113 @Test(dataProvider = "DoubleStreamTestData", dataProviderClass = DoubleStreamTestDataProvider.class)
114 public void testDoubleStream(String name, TestData.OfDouble data) {
115 exerciseDoubleStream(data, s -> s);
116 exerciseDoubleStream(data, s -> s.filter(dpTrue));
117 exerciseDoubleStream(data, s -> s.filter(dpFalse));
118 exerciseDoubleStream(data, s -> s.filter(dpEven));
119 }
120
121 void exerciseDoubleStream(TestData.OfDouble data, Function<DoubleStream, DoubleStream> fs) {
122 OptionalDouble r = exerciseTerminalOps(data, fs, s -> s.findFirst());
123 if (r.isPresent()) {
124 PrimitiveIterator.OfDouble i = fs.apply(data.stream()).iterator();
125 assertTrue(i.hasNext());
126 assertEquals(i.nextDouble(), r.getAsDouble());
127 }
128 else {
129 assertFalse(fs.apply(data.stream()).iterator().hasNext());
130 }
131 }
132 }