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 package test.java.io.InputStream;
24 
25 import java.io.ByteArrayInputStream;
26 import java.io.FilterInputStream;
27 import java.io.IOException;
28 import java.io.InputStream;
29 import java.util.Arrays;
30 import java.util.Random;
31 import org.testng.annotations.Test;
32 
33 /*
34  * @test
35  * @bug 8080835 8193832
36  * @library /test/lib
37  * @build jdk.test.lib.RandomFactory
38  * @run main ReadAllBytes
39  * @summary Basic test for InputStream.readAllBytes
40  * @key randomness
41  */
42 
43 public class ReadAllBytes {
44 
45     private static Random generator = new Random();
46 
47     @Test
testReadAllBytes()48     public void testReadAllBytes() throws IOException {
49         test(new byte[]{});
50         test(new byte[]{1, 2, 3});
51         test(createRandomBytes(1024));
52         for (int shift : new int[] {13, 14, 15, 17}) {
53             for (int offset : new int[] {-1, 0, 1}) {
54                 test(createRandomBytes((1 << shift) + offset));
55             }
56         }
57     }
58 
test(byte[] expectedBytes)59     static void test(byte[] expectedBytes) throws IOException {
60         int expectedLength = expectedBytes.length;
61         WrapperInputStream in = new WrapperInputStream(new ByteArrayInputStream(expectedBytes));
62         byte[] readBytes = in.readAllBytes();
63 
64         int x;
65         byte[] tmp = new byte[10];
66         check((x = in.read()) == -1,
67                 "Expected end of stream from read(), got " + x);
68         check((x = in.read(tmp)) == -1,
69                 "Expected end of stream from read(byte[]), got " + x);
70         check((x = in.read(tmp, 0, tmp.length)) == -1,
71                 "Expected end of stream from read(byte[], int, int), got " + x);
72         check(in.readAllBytes().length == 0,
73                 "Expected readAllBytes to return empty byte array");
74         check(expectedLength == readBytes.length,
75                 "Expected length " + expectedLength + ", got " + readBytes.length);
76         check(Arrays.equals(expectedBytes, readBytes),
77                 "Expected[" + expectedBytes + "], got:[" + readBytes + "]");
78         check(!in.isClosed(), "Stream unexpectedly closed");
79     }
80 
createRandomBytes(int size)81     static byte[] createRandomBytes(int size) {
82         byte[] bytes = new byte[size];
83         generator.nextBytes(bytes);
84         return bytes;
85     }
86 
check(boolean cond, Object ... failedArgs)87     static void check(boolean cond, Object ... failedArgs) {
88         if (cond)
89             return;
90         StringBuilder sb = new StringBuilder();
91         for (Object o : failedArgs)
92             sb.append(o);
93         throw new RuntimeException(sb.toString());
94     }
95 
96     static class WrapperInputStream extends FilterInputStream {
97         private boolean closed;
WrapperInputStream(InputStream in)98         WrapperInputStream(InputStream in) { super(in); }
close()99         @Override public void close() throws IOException { closed = true; in.close(); }
isClosed()100         boolean isClosed() { return closed; }
101     }
102 }