68 lines
2.4 KiB
Java
68 lines
2.4 KiB
Java
/*
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* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.io.IOException;
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import java.io.Reader;
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import java.io.StringReader;
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import java.nio.ByteBuffer;
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import java.nio.CharBuffer;
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import java.nio.ReadOnlyBufferException;
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/*
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* @test
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* @bug 8266078
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* @summary Tests that attempting to read into a read-only CharBuffer
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* does not advance the Reader position
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* @run main ReadIntoReadOnlyBuffer
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*/
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public class ReadIntoReadOnlyBuffer {
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private static final String THE_STRING = "123";
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public static void main(String[] args) throws Exception {
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CharBuffer buf = CharBuffer.allocate(8).asReadOnlyBuffer();
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StringReader r = new StringReader(THE_STRING);
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read(r, buf);
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buf = ByteBuffer.allocateDirect(16).asCharBuffer().asReadOnlyBuffer();
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r = new StringReader(THE_STRING);
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read(r, buf);
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}
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private static void read(Reader r, CharBuffer b) throws IOException {
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try {
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r.read(b);
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throw new RuntimeException("ReadOnlyBufferException expected");
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} catch (ReadOnlyBufferException expected) {
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}
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char[] c = new char[3];
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int n = r.read(c);
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if (n != c.length) {
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throw new RuntimeException("Expected " + c.length + ", got " + n);
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}
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String s = new String(c);
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if (!s.equals(THE_STRING)) {
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throw new RuntimeException("Expected " + THE_STRING + ", got " + s);
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}
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}
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}
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