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 31 import java.util.Collections; 32 import java.util.List; 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 }