1 /*
   2  * Copyright (c) 1999, 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 /* @test
  25    @bug 4260284
  26    @summary Test if DataOutputStream will overcount written field.
  27 */






  28 
  29 import java.io.*;
  30 
  31 public class WriteUTF {
  32     public static void main(String[] args) throws Exception {

  33         ByteArrayOutputStream baos = new ByteArrayOutputStream();
  34         DataOutputStream dos = new DataOutputStream(baos);
  35         dos.writeUTF("Hello, World!");  // 15
  36         dos.flush();
  37         if  (baos.size() != dos.size())
  38             throw new RuntimeException("Miscounted bytes in DataOutputStream.");
  39     }




























  40 }

   1 /*
   2  * Copyright (c) 1999, 2019, 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 /* @test
  25  * @bug 4260284 8219196
  26  * @summary Test if DataOutputStream will overcount written field.
  27  * @run testng WriteUTF
  28  */
  29 
  30 import java.io.ByteArrayOutputStream;
  31 import java.io.DataOutputStream;
  32 import java.io.IOException;
  33 import java.io.UTFDataFormatException;
  34 
  35 import org.testng.annotations.Test;
  36 
  37 public class WriteUTF {
  38     @Test
  39     public static void overcountWrittenField() throws IOException {
  40         ByteArrayOutputStream baos = new ByteArrayOutputStream();
  41         DataOutputStream dos = new DataOutputStream(baos);
  42         dos.writeUTF("Hello, World!");  // 15
  43         dos.flush();
  44         if  (baos.size() != dos.size())
  45             throw new RuntimeException("Miscounted bytes in DataOutputStream.");
  46     }
  47 
  48     private static void writeUTF(int size) throws IOException {
  49         StringBuilder sb = new StringBuilder(size);
  50         // this character gives 3 bytes when encoded using UTF-8
  51         char c = 0x0800;
  52         for (int i = 0; i < size; ++i) {
  53             sb.append(c);
  54         }
  55         ByteArrayOutputStream bos = new ByteArrayOutputStream();
  56         DataOutputStream dos = new DataOutputStream(bos);
  57         String s = sb.toString();
  58         // throws ArrayIndexOutOfBoundsException instead of expected
  59         // UTFDataFormatException
  60         dos.writeUTF(s);
  61     }
  62 
  63     @Test(expectedExceptions = UTFDataFormatException.class)
  64     public void utfDataFormatException() throws IOException {
  65         writeUTF(1 << 16);
  66     }
  67 
  68     // Without 8219196 fix, throws ArrayIndexOutOfBoundsException instead of
  69     // expected UTFDataFormatException. Disabled because it requires 4GB of
  70     // heap (-Xmx4g) to run without throwing an OutOfMemoryError.
  71     @Test(expectedExceptions = UTFDataFormatException.class, enabled = false)
  72     public void arrayIndexOutOfBoundsException() throws IOException {
  73         writeUTF(Integer.MAX_VALUE / 3 + 1);
  74     }
  75 }