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
35 * @library /test/lib
36 * @run main ReadAllBytes
37 * @summary Basic test for InputStream.readAllBytes
38 * @key randomness
39 */
40
41 public class ReadAllBytes {
42
43 private static Random generator = RandomFactory.getRandom();
44
45 public static void main(String[] args) throws IOException {
46 test(new byte[]{});
47 test(new byte[]{1, 2, 3});
48 test(createRandomBytes(1024));
49 test(createRandomBytes((1 << 13) - 1));
50 test(createRandomBytes((1 << 13)));
51 test(createRandomBytes((1 << 13) + 1));
52 test(createRandomBytes((1 << 15) - 1));
53 test(createRandomBytes((1 << 15)));
54 test(createRandomBytes((1 << 15) + 1));
55 test(createRandomBytes((1 << 17) - 1));
56 test(createRandomBytes((1 << 17)));
57 test(createRandomBytes((1 << 17) + 1));
58 }
59
60 static void test(byte[] expectedBytes) throws IOException {
61 int expectedLength = expectedBytes.length;
62 WrapperInputStream in = new WrapperInputStream(new ByteArrayInputStream(expectedBytes));
63 byte[] readBytes = in.readAllBytes();
64
65 int x;
66 byte[] tmp = new byte[10];
67 check((x = in.read()) == -1,
68 "Expected end of stream from read(), got " + x);
69 check((x = in.read(tmp)) == -1,
70 "Expected end of stream from read(byte[]), got " + x);
71 check((x = in.read(tmp, 0, tmp.length)) == -1,
72 "Expected end of stream from read(byte[], int, int), got " + x);
73 check(in.readAllBytes().length == 0,
74 "Expected readAllBytes to return empty byte array");
75 check(expectedLength == readBytes.length,
76 "Expected length " + expectedLength + ", got " + readBytes.length);
77 check(Arrays.equals(expectedBytes, readBytes),
78 "Expected[" + expectedBytes + "], got:[" + readBytes + "]");
79 check(!in.isClosed(), "Stream unexpectedly closed");
80 }
81
82 static byte[] createRandomBytes(int size) {
83 byte[] bytes = new byte[size];
84 generator.nextBytes(bytes);
85 return bytes;
86 }
87
88 static void check(boolean cond, Object ... failedArgs) {
89 if (cond)
90 return;
91 StringBuilder sb = new StringBuilder();
92 for (Object o : failedArgs)
93 sb.append(o);
94 throw new RuntimeException(sb.toString());
95 }
96
97 static class WrapperInputStream extends FilterInputStream {
98 private boolean closed;
99 WrapperInputStream(InputStream in) { super(in); }
100 @Override public void close() throws IOException { closed = true; in.close(); }
101 boolean isClosed() { return closed; }
102 }
103 }