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 */
23package java.util.stream;
24
25import org.testng.annotations.Test;
26
27import java.util.*;
28import java.util.stream.Stream;
29import java.util.stream.StreamOpFlag;
30import java.util.stream.Streams;
31
32import static java.util.stream.StreamOpFlag.*;
33import static org.testng.Assert.assertEquals;
34import static org.testng.Assert.assertTrue;
35
36/**
37 * StreamFlagsTest
38 *
39 * @author Brian Goetz
40 */
41@Test
42public class StreamFlagsTest {
43    Stream<String> arrayList = new ArrayList<String>().stream();
44    Stream<String> linkedList = new LinkedList<String>().stream();
45    Stream<String> hashSet = new HashSet<String>().stream();
46    Stream<String> treeSet = new TreeSet<String>().stream();
47    Stream<String> linkedHashSet = new LinkedHashSet<String>().stream();
48    Stream<String> repeat = Stream.generate(() -> "");
49
50    Stream<?>[] streams = { arrayList, linkedList, hashSet, treeSet, linkedHashSet, repeat };
51
52    private void assertFlags(int value, EnumSet<StreamOpFlag> setFlags, EnumSet<StreamOpFlag> clearFlags) {
53        for (StreamOpFlag flag : setFlags)
54            assertTrue(flag.isKnown(value));
55        for (StreamOpFlag flag : clearFlags)
56            assertTrue(!flag.isKnown(value));
57    }
58
59    public void testBaseStreams() {
60        Stream<String> arrayList = new ArrayList<String>().stream();
61        Stream<String> linkedList = new LinkedList<String>().stream();
62        Stream<String> hashSet = new HashSet<String>().stream();
63        Stream<String> treeSet = new TreeSet<String>().stream();
64        Stream<String> linkedHashSet = new LinkedHashSet<String>().stream();
65        Stream<String> repeat = Stream.generate(() -> "");
66
67        assertFlags(OpTestCase.getStreamFlags(arrayList),
68                    EnumSet.of(ORDERED, SIZED),
69                    EnumSet.of(DISTINCT, SORTED, SHORT_CIRCUIT));
70        assertFlags(OpTestCase.getStreamFlags(linkedList),
71                    EnumSet.of(ORDERED, SIZED),
72                    EnumSet.of(DISTINCT, SORTED, SHORT_CIRCUIT));
73        assertFlags(OpTestCase.getStreamFlags(hashSet),
74                    EnumSet.of(SIZED, DISTINCT),
75                    EnumSet.of(ORDERED, SORTED, SHORT_CIRCUIT));
76        assertFlags(OpTestCase.getStreamFlags(treeSet),
77                    EnumSet.of(ORDERED, SIZED, DISTINCT, SORTED),
78                    EnumSet.of(SHORT_CIRCUIT));
79        assertFlags(OpTestCase.getStreamFlags(linkedHashSet),
80                    EnumSet.of(ORDERED, DISTINCT, SIZED),
81                    EnumSet.of(SORTED, SHORT_CIRCUIT));
82        assertFlags(OpTestCase.getStreamFlags(repeat),
83                    EnumSet.noneOf(StreamOpFlag.class),
84                    EnumSet.of(DISTINCT, SORTED, SHORT_CIRCUIT));
85    }
86
87    public void testFilter() {
88        for (Stream<?> s : streams) {
89            int baseFlags = OpTestCase.getStreamFlags(s);
90            int filteredFlags = OpTestCase.getStreamFlags(s.filter((Object e) -> true));
91            int expectedFlags = baseFlags & ~SIZED.set();
92
93            assertEquals(filteredFlags, expectedFlags);
94        }
95    }
96}
97