1 /*
   2  * Copyright (c) 2011, 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 import java.io.*;
  25 
  26 /**
  27  * @test
  28  * @bug 7015589
  29  * @summary Test that buffering streams are considered closed even when the
  30  *    close or flush from the underlying stream fails.
  31  */
  32 
  33 public class FailingFlushAndClose {
  34 
  35     static int failed;
  36 
  37     static void fail(String msg) {
  38         System.err.println("FAIL: " + msg);
  39         failed++;
  40     }
  41 
  42     static void failWithIOE(String msg) throws IOException {
  43         fail(msg);
  44         throw new IOException(msg);
  45     }
  46 
  47     static class FailingCloseInputStream extends InputStream {
  48         boolean closed;
  49         @Override
  50         public int read()throws IOException {
  51             if (closed)
  52                 failWithIOE("input stream is closed");
  53             return 1;
  54         }
  55         @Override
  56         public void close() throws IOException {
  57             if (!closed) {
  58                 closed = true;
  59                 throw new IOException("close failed");
  60             }
  61         }
  62     }
  63 
  64     static class FailingCloseOutputStream extends OutputStream {
  65         boolean closed;
  66         @Override
  67         public void write(int b) throws IOException {
  68             if (closed)
  69                 failWithIOE("output stream is closed");
  70         }
  71         @Override
  72         public void flush() throws IOException {
  73             if (closed)
  74                 failWithIOE("output stream is closed");
  75         }
  76         @Override
  77         public void close() throws IOException {
  78             if (!closed) {
  79                 closed = true;
  80                 throw new IOException("close failed");
  81             }
  82         }
  83     }
  84 
  85     static class FailingFlushOutputStream extends OutputStream {
  86         boolean closed;
  87         @Override
  88         public void write(int b) throws IOException {
  89             if (closed)
  90                 failWithIOE("output stream is closed");
  91         }
  92         @Override
  93         public void flush() throws IOException {
  94             if (closed) {
  95                 failWithIOE("output stream is closed");
  96             } else {
  97                 throw new IOException("flush failed");
  98             }
  99         }
 100         @Override
 101         public void close() throws IOException {
 102             closed = true;
 103         }
 104     }
 105 
 106     static class FailingCloseReader extends Reader {
 107         boolean closed;
 108         @Override
 109         public int read(char[] cbuf, int off, int len) throws IOException {
 110             if (closed)
 111                 failWithIOE("reader is closed");
 112             return 1;
 113         }
 114         @Override
 115         public void close() throws IOException {
 116             if (!closed) {
 117                 closed = true;
 118                 throw new IOException("close failed");
 119             }
 120         }
 121     }
 122 
 123     static class FailingCloseWriter extends Writer {
 124         boolean closed;
 125         @Override
 126         public void write(char[] cbuf, int off, int len) throws IOException {
 127             if (closed)
 128                 failWithIOE("writer is closed");
 129         }
 130         @Override
 131         public void flush() throws IOException {
 132             if (closed)
 133                 failWithIOE("writer is closed");
 134         }
 135         @Override
 136         public void close() throws IOException {
 137             if (!closed) {
 138                 closed = true;
 139                 throw new IOException("close failed");
 140             }
 141         }
 142     }
 143 
 144     static class FailingFlushWriter extends Writer {
 145         boolean closed;
 146         @Override
 147         public void write(char[] cbuf, int off, int len) throws IOException {
 148             if (closed)
 149                 failWithIOE("writer is closed");
 150         }
 151         @Override
 152         public void flush() throws IOException {
 153             if (closed) {
 154                 failWithIOE("writer is closed");
 155             } else {
 156                 throw new IOException("flush failed");
 157             }
 158         }
 159         @Override
 160         public void close() throws IOException {
 161             if (!closed) {
 162                 closed = true;
 163                 throw new IOException("close failed");
 164             }
 165         }
 166     }
 167 
 168     static void testFailingClose(InputStream in) throws IOException {
 169         System.out.println(in.getClass());
 170         in.read(new byte[100]);
 171         try {
 172             in.close();
 173             fail("close did not fail");
 174         } catch (IOException expected) { }
 175         try {
 176             in.read(new byte[100]);
 177             fail("read did not fail");
 178         } catch (IOException expected) { }
 179     }
 180 
 181     static void testFailingClose(OutputStream out) throws IOException {
 182         System.out.println(out.getClass());
 183         out.write(1);
 184         try {
 185             out.close();
 186             fail("close did not fail");
 187         } catch (IOException expected) { }
 188         try {
 189             out.write(1);
 190             if (!(out instanceof BufferedOutputStream))
 191                 fail("write did not fail");
 192         } catch (IOException expected) { }
 193     }
 194 
 195     static void testFailingFlush(OutputStream out) throws IOException {
 196         System.out.println(out.getClass());
 197         out.write(1);
 198         try {
 199             out.flush();
 200             fail("flush did not fail");
 201         } catch (IOException expected) { }
 202         if (out instanceof BufferedOutputStream) {
 203             out.write(1);
 204             try {
 205                 out.close();
 206                 fail("close did not fail");
 207             } catch (IOException expected) { }
 208         }
 209     }
 210 
 211     static void testFailingClose(Reader r) throws IOException {
 212         System.out.println(r.getClass());
 213         r.read(new char[100]);
 214         try {
 215             r.close();
 216             fail("close did not fail");
 217         } catch (IOException expected) { }
 218         try {
 219             r.read(new char[100]);
 220             fail("read did not fail");
 221         } catch (IOException expected) { }
 222     }
 223 
 224     static void testFailingClose(Writer w) throws IOException {
 225         System.out.println(w.getClass());
 226         w.write("message");
 227         try {
 228             w.close();
 229             fail("close did not fail");
 230         } catch (IOException expected) { }
 231         try {
 232             w.write("another message");
 233             fail("write did not fail");
 234         } catch (IOException expected) { }
 235     }
 236 
 237     static void testFailingFlush(Writer w) throws IOException {
 238         System.out.println(w.getClass());
 239         w.write("message");
 240         try {
 241             w.flush();
 242             fail("flush did not fail");
 243         } catch (IOException expected) { }
 244         if (w instanceof BufferedWriter) {
 245             // assume this message will be buffered
 246             w.write("another message");
 247             try {
 248                 w.close();
 249                 fail("close did not fail");
 250             } catch (IOException expected) { }
 251         }
 252     }
 253 
 254     public static void main(String[] args) throws IOException {
 255 
 256         testFailingClose(new BufferedInputStream(new FailingCloseInputStream()));
 257         testFailingClose(new BufferedOutputStream(new FailingCloseOutputStream()));
 258 
 259         testFailingClose(new BufferedReader(new FailingCloseReader()));
 260         testFailingClose(new BufferedWriter(new FailingCloseWriter()));
 261 
 262         testFailingFlush(new BufferedOutputStream(new FailingFlushOutputStream()));
 263         testFailingFlush(new BufferedWriter(new FailingFlushWriter()));
 264 
 265         if (failed > 0)
 266             throw new RuntimeException(failed + " test(s) failed - see log for details");
 267     }
 268 }