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/*
* Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
@bug 4401798
@summary Check that single-character reads work properly
*/
import java.io.*;
public class One {
private abstract static class Test {
InputStreamReader isr;
StringBuffer sb;
String expect;
Test(byte[] in, String expect) throws Exception {
isr = new InputStreamReader(new ByteArrayInputStream(in), "UTF-8");
sb = new StringBuffer(expect.length());
this.expect = expect;
go();
}
void go() throws Exception {
read();
if (!expect.equals(sb.toString()))
throw new Exception("Expected " + expect
+ ", got " + sb.toString());
}
abstract void read() throws IOException;
}
private static void test(String expect) throws Exception {
byte[] in = expect.getBytes("UTF-8");
new Test(in, expect) {
public void read() throws IOException {
for (;;) {
int c;
if ((c = isr.read()) == -1)
break;
sb.append((char)c);
}
}};
new Test(in, expect) {
public void read() throws IOException {
for (;;) {
char[] cb = new char[1];
if (isr.read(cb) == -1)
break;
sb.append(cb[0]);
}
}};
new Test(in, expect) {
public void read() throws IOException {
for (;;) {
char[] cb = new char[2];
int n;
if ((n = isr.read(cb)) == -1)
break;
sb.append(cb[0]);
if (n == 2)
sb.append(cb[1]);
}
}};
}
public static void main(String[] args) throws Exception {
test("x");
test("xy");
test("xyz");
test("\ud800\udc00");
test("x\ud800\udc00");
}
}
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