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 */
23package java.util.stream;
24
25import java.util.ArrayList;
26import java.util.Arrays;
27import java.util.List;
28import java.util.PrimitiveIterator;
29import java.util.Spliterators;
30import java.util.function.Function;
31
32import org.testng.annotations.DataProvider;
33import org.testng.annotations.Test;
34
35@Test
36public class LongNodeTest extends OpTestCase {
37
38    @DataProvider(name = "nodes")
39    public Object[][] createSizes() {
40        List<Object[]> params = new ArrayList<>();
41
42        for (int size : Arrays.asList(0, 1, 4, 15, 16, 17, 127, 128, 129, 1000)) {
43            long[] array = new long[size];
44            for (int i = 0; i < array.length; i++) {
45                array[i] = i;
46            }
47
48            List<Node<Long>> nodes = new ArrayList<>();
49
50            nodes.add(Nodes.node(array));
51            nodes.add(degenerateTree(Spliterators.iterator(Arrays.spliterator(array))));
52            nodes.add(tree(toList(array), l -> Nodes.node(toLongArray(l))));
53            nodes.add(fill(array, Nodes.longBuilder(array.length)));
54            nodes.add(fill(array, Nodes.longBuilder()));
55
56            for (Node<Long> node : nodes) {
57                params.add(new Object[]{array, node});
58            }
59
60        }
61
62        return params.toArray(new Object[0][]);
63    }
64
65    private static void assertEqualsListLongArray(List<Long> list, long[] array) {
66        assertEquals(list.size(), array.length);
67        for (int i = 0; i < array.length; i++)
68            assertEquals(array[i], (long) list.get(i));
69    }
70
71    private List<Long> toList(long[] a) {
72        List<Long> l = new ArrayList<>();
73        for (long i : a) {
74            l.add(i);
75        }
76
77        return l;
78    }
79
80    private long[] toLongArray(List<Long> l) {
81        long[] a = new long[l.size()];
82
83        int i = 0;
84        for (Long e : l) {
85            a[i++] = e;
86        }
87        return a;
88    }
89
90    private Node.OfLong fill(long[] array, Node.Builder.OfLong nb) {
91        nb.begin(array.length);
92        for (long i : array)
93            nb.accept(i);
94        nb.end();
95        return nb.build();
96    }
97
98    private Node.OfLong degenerateTree(PrimitiveIterator.OfLong it) {
99        if (!it.hasNext()) {
100            return Nodes.node(new long[0]);
101        }
102
103        long i = it.nextLong();
104        if (it.hasNext()) {
105            return new Nodes.ConcNode.OfLong(Nodes.node(new long[] {i}), degenerateTree(it));
106        }
107        else {
108            return Nodes.node(new long[] {i});
109        }
110    }
111
112    private Node.OfLong tree(List<Long> l, Function<List<Long>, Node.OfLong> m) {
113        if (l.size() < 3) {
114            return m.apply(l);
115        }
116        else {
117            return new Nodes.ConcNode.OfLong(
118                    tree(l.subList(0, l.size() / 2), m),
119                    tree(l.subList(l.size() / 2, l.size()), m));
120        }
121    }
122
123    @Test(dataProvider = "nodes")
124    public void testAsArray(long[] array, Node.OfLong n) {
125        assertEquals(n.asPrimitiveArray(), array);
126    }
127
128    @Test(dataProvider = "nodes")
129    public void testFlattenAsArray(long[] array, Node.OfLong n) {
130        assertEquals(Nodes.flattenLong(n).asPrimitiveArray(), array);
131    }
132
133    @Test(dataProvider = "nodes")
134    public void testCopyTo(long[] array, Node.OfLong n) {
135        long[] copy = new long[(int) n.count()];
136        n.copyInto(copy, 0);
137
138        assertEquals(copy, array);
139    }
140
141    @Test(dataProvider = "nodes", groups = { "serialization-hostile" })
142    public void testForEach(long[] array, Node.OfLong n) {
143        List<Long> l = new ArrayList<>((int) n.count());
144        n.forEach((long e) -> {
145            l.add(e);
146        });
147
148        assertEqualsListLongArray(l, array);
149    }
150
151    @Test(dataProvider = "nodes")
152    public void testStreams(long[] array, Node.OfLong n) {
153        TestData.OfLong data = TestData.Factory.ofNode("Node", n);
154
155        exerciseOps(data, s -> s);
156
157        exerciseTerminalOps(data, s -> s.toArray());
158    }
159
160    @Test(dataProvider = "nodes")
161    public void testSpliterator(long[] array, Node.OfLong n) {
162        SpliteratorTestHelper.testLongSpliterator(n::spliterator);
163    }
164
165    @Test(dataProvider = "nodes")
166    public void testTruncate(long[] array, Node.OfLong n) {
167        int[] nums = new int[] { 0, 1, array.length / 2, array.length - 1, array.length };
168        for (int start : nums)
169            for (int end : nums) {
170                if (start < 0 || end < 0 || end < start || end > array.length)
171                    continue;
172                Node.OfLong slice = n.truncate(start, end, Long[]::new);
173                long[] asArray = slice.asPrimitiveArray();
174                for (int k = start; k < end; k++)
175                    assertEquals(array[k], asArray[k - start]);
176            }
177    }
178}
179