1 /* 2 * Copyright (c) 1998, 2020, 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 /* @test 25 @bug 4074875 4063511 8235792 26 @summary Make sure LineNumberReader.read(char, int , int) will increase 27 the linenumber correctly. 28 */ 29 30 import java.io.IOException; 31 import java.io.LineNumberReader; 32 import java.io.StringReader; 33 import java.util.function.Consumer; 34 35 public class Read { 36 37 public static void main(String[] args) throws Exception { 38 testReadChars(); 39 testEofs(); 40 } 41 42 private static void testReadChars() throws Exception { 43 String s = "aaaa\nbbb\n"; 44 char[] buf = new char[5]; 45 int n = 0; 46 int line = 0; 47 48 LineNumberReader r = new LineNumberReader(new StringReader(s)); 49 50 do { 51 n = r.read(buf, 0, buf.length); 52 } while (n > 0); 53 54 line = r.getLineNumber(); 55 56 if (line != 2) 57 throw new Exception("Failed test: Expected line number: 2, got " 58 + line); 59 } 60 61 private static void testEofs() throws Exception { 62 String string = "first \n second"; 63 64 Consumer<LineNumberReader> c = (LineNumberReader r) -> { 65 try { 66 while (r.read() != -1) 67 continue; 68 } catch (IOException e) { 69 throw new RuntimeException(e); 70 } 71 }; 72 testEof(c, string, 2); 73 74 c = (LineNumberReader r) -> { 75 try { 76 char[] buf = new char[128]; 77 while (r.read(buf) != -1) 78 continue; 79 } catch (IOException e) { 80 throw new RuntimeException(e); 81 } 82 }; 83 testEof(c, string, 2); 84 85 c = (LineNumberReader r) -> { 86 try { 87 while (r.readLine() != null) 88 continue; 89 } catch (IOException e) { 90 throw new RuntimeException(e); 91 } 92 }; 93 testEof(c, string, 2); 94 } 95 96 private static void testEof(Consumer<LineNumberReader> c, String s, int n) 97 throws Exception { 98 LineNumberReader r = new LineNumberReader(new StringReader(s)); 99 c.accept(r); 100 int line; 101 if ((line = r.getLineNumber()) != n) 102 throw new Exception("Failed test: Expected line number: " + n + 103 " , got " + line); 104 } 105 }