util/Collections/AddAll.java

/*
 * Copyright (c) 2003, 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     4822887
 * @summary Basic test for Collections.addAll
 * @author  Josh Bloch
 * @key randomness
 */

import java.util.*;

public class AddAll {
    static final int N = 100;
    public static void main(String[] args) {
        test(new ArrayList<Integer>());
        test(new LinkedList<Integer>());
        test(new HashSet<Integer>());
        test(new LinkedHashSet<Integer>());
    }

    private static Random rnd = new Random();

    static void test(Collection<Integer> c) {
        int x = 0;
        for (int i = 0; i < N; i++) {
            int rangeLen = rnd.nextInt(10);
            if (Collections.addAll(c, range(x, x + rangeLen)) !=
                (rangeLen != 0))
                throw new RuntimeException("" + rangeLen);
            x += rangeLen;
        }
        if (c instanceof List) {
            if (!c.equals(Arrays.asList(range(0, x))))
                throw new RuntimeException(x +": "+c);
        } else {
            if (!c.equals(new HashSet<Integer>(Arrays.asList(range(0, x)))))
                throw new RuntimeException(x +": "+c);
        }
    }

    private static Integer[] range(int from, int to) {
        Integer[] result = new Integer[to - from];
        for (int i = from, j=0; i < to; i++, j++)
            result[j] = new Integer(i);
        return result;
    }
}
Revision:	1.6
Committed:	Sun Oct 22 02:59:17 2017 UTC (6 years, 7 months ago) by jsr166
Branch:	MAIN
Changes since 1.5:	+1 -1 lines
Log Message:	fix errorprone [MixedArrayDimensions] warnings
#	User	Rev	Content
1	jsr166	1.1	/*
2	jsr166	1.2	* Copyright (c) 2003, 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 4822887
27			* @summary Basic test for Collections.addAll
28			* @author Josh Bloch
29	jsr166	1.5	* @key randomness
30	jsr166	1.1	*/
31
32			import java.util.*;
33
34			public class AddAll {
35	jsr166	1.3	static final int N = 100;
36	jsr166	1.6	public static void main(String[] args) {
37	jsr166	1.1	test(new ArrayList<Integer>());
38			test(new LinkedList<Integer>());
39			test(new HashSet<Integer>());
40			test(new LinkedHashSet<Integer>());
41			}
42
43			private static Random rnd = new Random();
44
45			static void test(Collection<Integer> c) {
46			int x = 0;
47			for (int i = 0; i < N; i++) {
48			int rangeLen = rnd.nextInt(10);
49			if (Collections.addAll(c, range(x, x + rangeLen)) !=
50			(rangeLen != 0))
51			throw new RuntimeException("" + rangeLen);
52			x += rangeLen;
53			}
54			if (c instanceof List) {
55			if (!c.equals(Arrays.asList(range(0, x))))
56			throw new RuntimeException(x +": "+c);
57			} else {
58			if (!c.equals(new HashSet<Integer>(Arrays.asList(range(0, x)))))
59			throw new RuntimeException(x +": "+c);
60			}
61			}
62
63			private static Integer[] range(int from, int to) {
64			Integer[] result = new Integer[to - from];
65			for (int i = from, j=0; i < to; i++, j++)
66			result[j] = new Integer(i);
67			return result;
68			}
69			}