util/Collections/NCopies.java

/*
 * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @test
 * @bug     6267846 6275009
 * @summary Test Collections.nCopies
 * @author  Martin Buchholz
 */

import java.util.*;
import java.util.concurrent.*;

public class NCopies {
    static volatile int passed = 0, failed = 0;

    static void fail(String msg) {
        failed++;
        new AssertionError(msg).printStackTrace();
    }

    static void pass() {
        passed++;
    }

    static void unexpected(Throwable t) {
        failed++;
        t.printStackTrace();
    }

    static void check(boolean condition, String msg) {
        if (condition)
            passed++;
        else
            fail(msg);
    }

    static void check(boolean condition) {
        check(condition, "Assertion failure");
    }

    private static void checkEmpty(List<String> x) {
            check(x.isEmpty());
            check(x.size() == 0);
            check(x.indexOf("foo") == -1);
            check(x.lastIndexOf("foo") == -1);
            check(x.toArray().length == 0);
            check(x.toArray().getClass() == Object[].class);
    }

    private static void checkFoos(List<String> x) {
            check(! x.isEmpty());
            check(x.indexOf(new String("foo")) == 0);
            check(x.lastIndexOf(new String("foo")) == x.size()-1);
            check(x.toArray().length == x.size());
            check(x.toArray().getClass() == Object[].class);
            String[] sa = x.toArray(new String[x.size()]);
            check(sa.getClass() == String[].class);
            check(sa[0].equals("foo"));
            check(sa[sa.length-1].equals("foo"));
            check(x.get(x.size()/2).equals("foo"));
            checkEmpty(x.subList(x.size()/2, x.size()/2));
    }

    public static void main(String[] args) {
        try {
            List<String> empty = Collections.nCopies(0, "foo");
            checkEmpty(empty);
            checkEmpty(empty.subList(0,0));

            List<String> foos = Collections.nCopies(42, "foo");
            check(foos.size() == 42);
            checkFoos(foos.subList(foos.size()/2, foos.size()-1));

        } catch (Throwable t) { unexpected(t); }

        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
        if (failed > 0) throw new Error("Some tests failed");
    }
}
Revision:	1.2
Committed:	Sun Sep 5 21:32:19 2010 UTC (13 years, 8 months ago) by jsr166
Branch:	MAIN
CVS Tags:	release-1_7_0
Changes since 1.1:	+4 -4 lines
Log Message:	Update legal notices to Oracle wording
#	User	Rev	Content
1	jsr166	1.1	/*
2	jsr166	1.2	* Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
3	jsr166	1.1	* 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	jsr166	1.2	* 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	jsr166	1.1	*/
23
24			/*
25			* @test
26			* @bug 6267846 6275009
27			* @summary Test Collections.nCopies
28			* @author Martin Buchholz
29			*/
30
31			import java.util.*;
32			import java.util.concurrent.*;
33
34			public 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			}