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/* |
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* Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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|
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/* |
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* @test |
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* @bug 4822887 |
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* @summary Basic test for Collections.addAll |
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* @author Josh Bloch |
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* @key randomness |
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*/ |
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|
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.Collections; |
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import java.util.HashSet; |
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import java.util.LinkedHashSet; |
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import java.util.LinkedList; |
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import java.util.List; |
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import java.util.Random; |
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|
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public class AddAll { |
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static final int N = 100; |
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public static void main(String[] args) { |
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test(new ArrayList<Integer>()); |
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test(new LinkedList<Integer>()); |
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test(new HashSet<Integer>()); |
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test(new LinkedHashSet<Integer>()); |
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} |
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|
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private static Random rnd = new Random(); |
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|
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static void test(Collection<Integer> c) { |
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int x = 0; |
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for (int i = 0; i < N; i++) { |
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int rangeLen = rnd.nextInt(10); |
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if (Collections.addAll(c, range(x, x + rangeLen)) != |
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(rangeLen != 0)) |
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throw new RuntimeException("" + rangeLen); |
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x += rangeLen; |
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} |
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if (c instanceof List) { |
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if (!c.equals(Arrays.asList(range(0, x)))) |
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throw new RuntimeException(x +": "+c); |
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} else { |
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if (!c.equals(new HashSet<Integer>(Arrays.asList(range(0, x))))) |
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throw new RuntimeException(x +": "+c); |
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} |
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} |
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|
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private static Integer[] range(int from, int to) { |
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Integer[] result = new Integer[to - from]; |
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for (int i = from, j=0; i < to; i++, j++) |
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result[j] = new Integer(i); |
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return result; |
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} |
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} |
