1/*
2 * Copyright (c) 2005, 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
24/*
25 * @test
26 * @bug     6267846 6275009
27 * @summary Test Collections.nCopies
28 * @author  Martin Buchholz
29 */
30
31import java.util.*;
32import java.util.concurrent.*;
33
34public class NCopies {
35    static volatile int passed = 0, failed = 0;
36
37    static void fail(String msg) {
38        failed++;
39        new AssertionError(msg).printStackTrace();
40    }
41
42    static void pass() {
43        passed++;
44    }
45
46    static void unexpected(Throwable t) {
47        failed++;
48        t.printStackTrace();
49    }
50
51    static void check(boolean condition, String msg) {
52        if (condition)
53            passed++;
54        else
55            fail(msg);
56    }
57
58    static void check(boolean condition) {
59        check(condition, "Assertion failure");
60    }
61
62    private static void checkEmpty(List<String> x) {
63            check(x.isEmpty());
64            check(x.size() == 0);
65            check(x.indexOf("foo") == -1);
66            check(x.lastIndexOf("foo") == -1);
67            check(x.toArray().length == 0);
68            check(x.toArray().getClass() == Object[].class);
69    }
70
71    private static void checkFoos(List<String> x) {
72            check(! x.isEmpty());
73            check(x.indexOf(new String("foo")) == 0);
74            check(x.lastIndexOf(new String("foo")) == x.size()-1);
75            check(x.toArray().length == x.size());
76            check(x.toArray().getClass() == Object[].class);
77            String[] sa = x.toArray(new String[x.size()]);
78            check(sa.getClass() == String[].class);
79            check(sa[0].equals("foo"));
80            check(sa[sa.length-1].equals("foo"));
81            check(x.get(x.size()/2).equals("foo"));
82            checkEmpty(x.subList(x.size()/2, x.size()/2));
83    }
84
85    public static void main(String[] args) {
86        try {
87            List<String> empty = Collections.nCopies(0, "foo");
88            checkEmpty(empty);
89            checkEmpty(empty.subList(0,0));
90
91            List<String> foos = Collections.nCopies(42, "foo");
92            check(foos.size() == 42);
93            checkFoos(foos.subList(foos.size()/2, foos.size()-1));
94
95        } catch (Throwable t) { unexpected(t); }
96
97        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
98        if (failed > 0) throw new Error("Some tests failed");
99    }
100}
101