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 }