1 /* 2 * Copyright (c) 2015, 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.IOException; 26 import java.io.InputStream; 27 import java.util.Arrays; 28 import java.util.Random; 29 30 /* 31 * @test 32 * @bug 8765432 33 * @library /lib/testlibrary 34 * @build jdk.testlibrary.* 35 * @key randomness 36 * @summary Basic test for InputStream.readAllBytes 37 */ 38 public class ReadAllBytes { 39 40 // TODO: Improve test coverage... 41 42 private static Random generator = RandomFactory.getRandom(); 43 44 public static void main(String[] args) throws IOException { 45 test(new byte[]{}); 46 test(new byte[]{1, 2, 3}); 47 test(createRandomBytes(1024)); 48 test(createRandomBytes((1 << 13) - 1)); 49 test(createRandomBytes((1 << 13))); 50 test(createRandomBytes((1 << 13) + 1)); 51 test(createRandomBytes((1 << 15) - 1)); 52 test(createRandomBytes((1 << 15))); 53 test(createRandomBytes((1 << 15) + 1)); 54 test(createRandomBytes((1 << 17) - 1)); 55 test(createRandomBytes((1 << 17))); 56 test(createRandomBytes((1 << 17) + 1)); 57 } 58 59 static void test(byte[] expectedBytes) throws IOException { 60 int expectedLength = expectedBytes.length; 61 InputStream in = 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 } 79 80 static byte[] createRandomBytes(int size) { 81 byte[] bytes = new byte[size]; 82 generator.nextBytes(bytes); 83 return bytes; 84 } 85 86 static void check(boolean cond, Object ... failedArgs) { 87 if (cond) 88 return; 89 StringBuilder sb = new StringBuilder(); 90 for (Object o : failedArgs) 91 sb.append(o); 92 throw new RuntimeException(sb.toString()); 93 } 94 }