1 /*
   2  * Copyright (c) 2015, 2017, 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.ByteArrayInputStream;
  25 import java.io.FilterInputStream;
  26 import java.io.IOException;
  27 import java.io.InputStream;
  28 import java.util.Arrays;
  29 import java.util.Random;
  30 import jdk.test.lib.RandomFactory;
  31 
  32 /*
  33  * @test
  34  * @bug 8080835 8193832
  35  * @library /test/lib
  36  * @build jdk.test.lib.RandomFactory
  37  * @run main ReadAllBytes
  38  * @summary Basic test for InputStream.readAllBytes
  39  * @key randomness
  40  */
  41 
  42 public class ReadAllBytes {
  43 
  44     private static Random generator = RandomFactory.getRandom();
  45 
  46     public static void main(String[] args) throws IOException {
  47         test(new byte[]{});
  48         test(new byte[]{1, 2, 3});
  49         test(createRandomBytes(1024));
  50         for (int shift : new int[] {13, 14, 15, 17}) {
  51             for (int offset : new int[] {-1, 0, 1}) {
  52                 test(createRandomBytes((1 << shift) + offset));
  53             }
  54         }




  55     }
  56 
  57     static void test(byte[] expectedBytes) throws IOException {
  58         int expectedLength = expectedBytes.length;
  59         WrapperInputStream in = new WrapperInputStream(new ByteArrayInputStream(expectedBytes));
  60         byte[] readBytes = in.readAllBytes();
  61 
  62         int x;
  63         byte[] tmp = new byte[10];
  64         check((x = in.read()) == -1,
  65               "Expected end of stream from read(), got " + x);
  66         check((x = in.read(tmp)) == -1,
  67               "Expected end of stream from read(byte[]), got " + x);
  68         check((x = in.read(tmp, 0, tmp.length)) == -1,
  69               "Expected end of stream from read(byte[], int, int), got " + x);
  70         check(in.readAllBytes().length == 0,
  71               "Expected readAllBytes to return empty byte array");
  72         check(expectedLength == readBytes.length,
  73               "Expected length " + expectedLength + ", got " + readBytes.length);
  74         check(Arrays.equals(expectedBytes, readBytes),
  75               "Expected[" + expectedBytes + "], got:[" + readBytes + "]");
  76         check(!in.isClosed(), "Stream unexpectedly closed");
  77     }
  78 
  79     static byte[] createRandomBytes(int size) {
  80         byte[] bytes = new byte[size];
  81         generator.nextBytes(bytes);
  82         return bytes;
  83     }
  84 
  85     static void check(boolean cond, Object ... failedArgs) {
  86         if (cond)
  87             return;
  88         StringBuilder sb = new StringBuilder();
  89         for (Object o : failedArgs)
  90             sb.append(o);
  91         throw new RuntimeException(sb.toString());
  92     }
  93 
  94     static class WrapperInputStream extends FilterInputStream {
  95         private boolean closed;
  96         WrapperInputStream(InputStream in) { super(in); }
  97         @Override public void close() throws IOException { closed = true; in.close(); }
  98         boolean isClosed() { return closed; }
  99     }
 100 }
--- EOF ---