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/*
* Copyright (c) 2021, 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 4926314
* @summary Test for CharArrayReader#read(CharBuffer).
* @run testng ReadCharBuffer
*/
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
import java.io.CharArrayReader;
import java.io.IOException;
import java.io.Reader;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.util.Arrays;
import static org.testng.Assert.assertEquals;
public class ReadCharBuffer {
private static final int BUFFER_SIZE = 7;
@DataProvider(name = "buffers")
public Object[][] createBuffers() {
// test both on-heap and off-heap buffers as they may use different code paths
return new Object[][]{
new Object[]{CharBuffer.allocate(BUFFER_SIZE)},
new Object[]{ByteBuffer.allocateDirect(BUFFER_SIZE * 2).asCharBuffer()}
};
}
@Test(dataProvider = "buffers")
public void read(CharBuffer buffer) throws IOException {
fillBuffer(buffer);
try (Reader reader = new CharArrayReader("ABCD".toCharArray())) {
buffer.limit(3);
buffer.position(1);
assertEquals(reader.read(buffer), 2);
assertEquals(buffer.position(), 3);
assertEquals(buffer.limit(), 3);
buffer.limit(7);
buffer.position(4);
assertEquals(reader.read(buffer), 2);
assertEquals(buffer.position(), 6);
assertEquals(buffer.limit(), 7);
assertEquals(reader.read(buffer), -1);
}
buffer.clear();
assertEquals(buffer.toString(), "xABxCDx");
}
private void fillBuffer(CharBuffer buffer) {
char[] filler = new char[BUFFER_SIZE];
Arrays.fill(filler, 'x');
buffer.put(filler);
buffer.clear();
}
}
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