test/jdk/java/io/InputStreamReader/One.java
changeset 47216 71c04702a3d5
parent 32649 2ee9017c7597
equal deleted inserted replaced
47215:4ebc2e2fb97c 47216:71c04702a3d5
       
     1 /*
       
     2  * Copyright (c) 2001, 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 4401798
       
    26    @summary Check that single-character reads work properly
       
    27  */
       
    28 
       
    29 
       
    30 import java.io.*;
       
    31 
       
    32 
       
    33 public class One {
       
    34 
       
    35     private abstract static class Test {
       
    36 
       
    37         InputStreamReader isr;
       
    38         StringBuffer sb;
       
    39         String expect;
       
    40 
       
    41         Test(byte[] in, String expect) throws Exception {
       
    42             isr = new InputStreamReader(new ByteArrayInputStream(in), "UTF-8");
       
    43             sb = new StringBuffer(expect.length());
       
    44             this.expect = expect;
       
    45             go();
       
    46         }
       
    47 
       
    48         void go() throws Exception {
       
    49             read();
       
    50             if (!expect.equals(sb.toString()))
       
    51                 throw new Exception("Expected " + expect
       
    52                                     + ", got " + sb.toString());
       
    53         }
       
    54 
       
    55         abstract void read() throws IOException;
       
    56 
       
    57     }
       
    58 
       
    59 
       
    60     private static void test(String expect) throws Exception {
       
    61         byte[] in = expect.getBytes("UTF-8");
       
    62 
       
    63         new Test(in, expect) {
       
    64                 public void read() throws IOException {
       
    65                     for (;;) {
       
    66                         int c;
       
    67                         if ((c = isr.read()) == -1)
       
    68                             break;
       
    69                         sb.append((char)c);
       
    70                     }
       
    71                 }};
       
    72 
       
    73         new Test(in, expect) {
       
    74                 public void read() throws IOException {
       
    75                     for (;;) {
       
    76                         char[] cb = new char[1];
       
    77                         if (isr.read(cb) == -1)
       
    78                             break;
       
    79                         sb.append(cb[0]);
       
    80                     }
       
    81                 }};
       
    82 
       
    83         new Test(in, expect) {
       
    84                 public void read() throws IOException {
       
    85                     for (;;) {
       
    86                         char[] cb = new char[2];
       
    87                         int n;
       
    88                         if ((n = isr.read(cb)) == -1)
       
    89                             break;
       
    90                         sb.append(cb[0]);
       
    91                         if (n == 2)
       
    92                             sb.append(cb[1]);
       
    93                     }
       
    94                 }};
       
    95 
       
    96     }
       
    97 
       
    98     public static void main(String[] args) throws Exception {
       
    99         test("x");
       
   100         test("xy");
       
   101         test("xyz");
       
   102         test("\ud800\udc00");
       
   103         test("x\ud800\udc00");
       
   104     }
       
   105 
       
   106 }