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 * @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 test(createRandomBytes((1 << 13) - 1));
51 test(createRandomBytes((1 << 13)));
52 test(createRandomBytes((1 << 13) + 1));
53 test(createRandomBytes((1 << 15) - 1));
54 test(createRandomBytes((1 << 15)));
55 test(createRandomBytes((1 << 15) + 1));
56 test(createRandomBytes((1 << 17) - 1));
57 test(createRandomBytes((1 << 17)));
58 test(createRandomBytes((1 << 17) + 1));
59 }
60
61 static void test(byte[] expectedBytes) throws IOException {
62 int expectedLength = expectedBytes.length;
63 WrapperInputStream in = new WrapperInputStream(new ByteArrayInputStream(expectedBytes));
64 byte[] readBytes = in.readAllBytes();
65
66 int x;
67 byte[] tmp = new byte[10];
68 check((x = in.read()) == -1,
69 "Expected end of stream from read(), got " + x);
70 check((x = in.read(tmp)) == -1,
71 "Expected end of stream from read(byte[]), got " + x);
72 check((x = in.read(tmp, 0, tmp.length)) == -1,
73 "Expected end of stream from read(byte[], int, int), got " + x);
74 check(in.readAllBytes().length == 0,
75 "Expected readAllBytes to return empty byte array");
76 check(expectedLength == readBytes.length,
77 "Expected length " + expectedLength + ", got " + readBytes.length);
78 check(Arrays.equals(expectedBytes, readBytes),
79 "Expected[" + expectedBytes + "], got:[" + readBytes + "]");
80 check(!in.isClosed(), "Stream unexpectedly closed");
81 }
82
83 static byte[] createRandomBytes(int size) {
84 byte[] bytes = new byte[size];
85 generator.nextBytes(bytes);
86 return bytes;
87 }
88
89 static void check(boolean cond, Object ... failedArgs) {
90 if (cond)
91 return;
92 StringBuilder sb = new StringBuilder();
93 for (Object o : failedArgs)
94 sb.append(o);
95 throw new RuntimeException(sb.toString());
96 }
97
98 static class WrapperInputStream extends FilterInputStream {
99 private boolean closed;
100 WrapperInputStream(InputStream in) { super(in); }
101 @Override public void close() throws IOException { closed = true; in.close(); }
102 boolean isClosed() { return closed; }
103 }
104 }