J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2004 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 | /** |
| 25 | * @test |
| 26 | * @bug 5030063 |
| 27 | * @summary Basic tests for flush(). |
| 28 | */ |
| 29 | |
| 30 | import java.io.Closeable; |
| 31 | import java.io.Flushable; |
| 32 | import java.util.Formatter; |
| 33 | import java.util.FormatterClosedException; |
| 34 | |
| 35 | public class Flush { |
| 36 | |
| 37 | private static class ExpectedException extends RuntimeException {} |
| 38 | |
| 39 | private static class F implements Appendable, Closeable, Flushable { |
| 40 | public Appendable append(CharSequence csq) { return null; } |
| 41 | public Appendable append(char c) { return null; } |
| 42 | public Appendable append(CharSequence csq, int s, int e) { |
| 43 | return null; |
| 44 | } |
| 45 | public void close() {} |
| 46 | |
| 47 | public void flush() { |
| 48 | throw new ExpectedException(); |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | private static class NF implements Appendable, Closeable { |
| 53 | public Appendable append(CharSequence csq) { return null; } |
| 54 | public Appendable append(char c) { return null; } |
| 55 | public Appendable append(CharSequence csq, int s, int e) { |
| 56 | return null; |
| 57 | } |
| 58 | public void close() {} |
| 59 | |
| 60 | // method coincidentally called flush() |
| 61 | public void flush() { |
| 62 | throw new RuntimeException("NF.flush should not be called"); |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | private static void test(Formatter f) { |
| 67 | if (f.out() instanceof F) { |
| 68 | // F.flush() called since F implements Flushable |
| 69 | try { |
| 70 | f.flush(); |
| 71 | throw new RuntimeException("F.flush not called"); |
| 72 | } catch (ExpectedException x) { |
| 73 | System.out.println(" F.flush called"); |
| 74 | } |
| 75 | } else { |
| 76 | // NF.flush() not called since NF does not implement Flushable |
| 77 | f.flush(); |
| 78 | } |
| 79 | |
| 80 | // Formatter is a Flushable |
| 81 | if (!(f instanceof Flushable)) |
| 82 | throw new RuntimeException("Formatter is not a Flushable"); |
| 83 | |
| 84 | // flush() after close() throws a FormatterClosedException |
| 85 | f.close(); |
| 86 | try { |
| 87 | f.flush(); |
| 88 | throw new RuntimeException("FormatterClosedException not thrown"); |
| 89 | } catch (FormatterClosedException x) { |
| 90 | System.out.println(" FormatterClosedException thrown"); |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | public static void main(String [] args) { |
| 95 | System.out.println("testing Flushable"); |
| 96 | test(new Formatter(new F())); |
| 97 | System.out.println("testing non-Flushable"); |
| 98 | test(new Formatter(new NF())); |
| 99 | } |
| 100 | } |