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 8193832 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 for (int shift : new int[] {13, 14, 15, 17}) { 51 for (int offset : new int[] {-1, 0, 1}) { 52 test(createRandomBytes((1 << shift) + offset)); 53 } 54 } 55 } 56 57 static void test(byte[] expectedBytes) throws IOException { 58 int expectedLength = expectedBytes.length; 59 WrapperInputStream in = new WrapperInputStream(new ByteArrayInputStream(expectedBytes)); 60 byte[] readBytes = in.readAllBytes(); 61 62 int x; 63 byte[] tmp = new byte[10]; 64 check((x = in.read()) == -1, 65 "Expected end of stream from read(), got " + x); 66 check((x = in.read(tmp)) == -1, 67 "Expected end of stream from read(byte[]), got " + x); 68 check((x = in.read(tmp, 0, tmp.length)) == -1, 69 "Expected end of stream from read(byte[], int, int), got " + x); 70 check(in.readAllBytes().length == 0, 71 "Expected readAllBytes to return empty byte array"); 72 check(expectedLength == readBytes.length, 73 "Expected length " + expectedLength + ", got " + readBytes.length); 74 check(Arrays.equals(expectedBytes, readBytes), 75 "Expected[" + expectedBytes + "], got:[" + readBytes + "]"); 76 check(!in.isClosed(), "Stream unexpectedly closed"); 77 } 78 79 static byte[] createRandomBytes(int size) { 80 byte[] bytes = new byte[size]; 81 generator.nextBytes(bytes); 82 return bytes; 83 } 84 85 static void check(boolean cond, Object ... failedArgs) { 86 if (cond) 87 return; 88 StringBuilder sb = new StringBuilder(); 89 for (Object o : failedArgs) 90 sb.append(o); 91 throw new RuntimeException(sb.toString()); 92 } 93 94 static class WrapperInputStream extends FilterInputStream { 95 private boolean closed; 96 WrapperInputStream(InputStream in) { super(in); } 97 @Override public void close() throws IOException { closed = true; in.close(); } 98 boolean isClosed() { return closed; } 99 } 100 }