J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* @test |
| 25 | * @bug 4175312 |
| 26 | * @summary Test StringReader.skip with negative param |
| 27 | */ |
| 28 | |
| 29 | import java.io.*; |
| 30 | |
| 31 | public class Skip { |
| 32 | public static void main( String argv[] ) throws Exception { |
| 33 | StringReader in = new StringReader("1234567"); |
| 34 | |
| 35 | // Skip forward and read |
| 36 | if (in.skip(3) != 3) |
| 37 | throw new RuntimeException("skip(3) failed"); |
| 38 | if (in.read() != '4') |
| 39 | throw new RuntimeException("post skip read failure"); |
| 40 | |
| 41 | // Skip backward and read |
| 42 | if (in.skip(-2) != -2) |
| 43 | throw new RuntimeException("skip(-2) failed"); |
| 44 | if (in.read() != '3') |
| 45 | throw new RuntimeException("read failed after negative skip"); |
| 46 | |
| 47 | // Attempt to skip backward past the beginning and read |
| 48 | if (in.skip(-6) != -3) |
| 49 | throw new RuntimeException("skip(-6) failed"); |
| 50 | if (in.read() != '1') |
| 51 | throw new RuntimeException("read after skip past beginning failed"); |
| 52 | |
| 53 | // Skip beyond the end |
| 54 | if (in.skip(30) != 6) |
| 55 | throw new RuntimeException("skip(30) failed"); |
| 56 | if (in.read() != -1) |
| 57 | throw new RuntimeException("read at EOF failed"); |
| 58 | |
| 59 | // Test after reaching end of string |
| 60 | if (in.skip(30) != 0) |
| 61 | throw new RuntimeException("skip(30) failed"); |
| 62 | if (in.skip(-30) != 0) |
| 63 | throw new RuntimeException("skip(30) failed"); |
| 64 | } |
| 65 | } |