1 /*
2  * Copyright (c) 2018, 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 package test.java.io.ByteArrayInputStream;
24 
25 import java.io.ByteArrayInputStream;
26 import java.io.ByteArrayOutputStream;
27 import java.io.IOException;
28 import java.util.Arrays;
29 import java.util.Objects;
30 import java.util.Random;
31 
32 import org.testng.annotations.Test;
33 
34 /* @test
35  * @library /test/lib
36  * @build jdk.test.lib.RandomFactory
37  * @run main ReadAllReadNTransferTo
38  * @bug 8180451
39  * @summary Verify ByteArrayInputStream readAllBytes, readNBytes, and transferTo
40  * @key randomness
41  */
42 public class ReadAllReadNTransferTo {
43     private static final int SIZE = 0x4d4d;
44 
45     private static Random random = new Random();
46 
47     @Test
testRead()48     public void testRead() throws IOException {
49         byte[] buf = new byte[SIZE];
50         random.nextBytes(buf);
51         int position = random.nextInt(SIZE/2);
52         int size = random.nextInt(SIZE - position);
53 
54         ByteArrayInputStream bais =
55                 new ByteArrayInputStream(buf, position, size);
56         int off = size < 2 ? 0 : random.nextInt(size / 2);
57         int len = size - off < 1 ? 0 : random.nextInt(size - off);
58 
59         byte[] bN = new byte[off + len];
60         if (bais.readNBytes(bN, off, len) != len) {
61             throw new RuntimeException("readNBytes return value");
62         }
63 
64         if (!Arrays.equals(Arrays.copyOfRange(bN, off, off+len),
65                 Arrays.copyOfRange(buf, position, position+len))) {
66             throw new RuntimeException("readNBytes content");
67         }
68 
69         byte[] bAll = bais.readAllBytes();
70         Objects.requireNonNull(bAll, "readAllBytes return value");
71         if (bAll.length != size - len) {
72             throw new RuntimeException("readAllBytes return value length");
73         }
74         if (!Arrays.equals(bAll,
75                Arrays.copyOfRange( buf, position + len, position + len + bAll.length))) {
76             throw new RuntimeException("readAllBytes content");
77         }
78 
79         // XXX transferTo()
80         bais = new ByteArrayInputStream(buf);
81         ByteArrayOutputStream baos = new ByteArrayOutputStream(buf.length);
82         if (bais.transferTo(baos) != buf.length) {
83             throw new RuntimeException("transferTo return value length");
84         }
85         if (!Arrays.equals(buf, baos.toByteArray())) {
86             throw new RuntimeException("transferTo content");
87         }
88     }
89 }