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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
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* 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
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/*
* @ test 8167461
* @ summary Verify PipeInputStream works .
* @ modules jdk . compiler / com . sun . tools . javac . util
* jdk . jshell / jdk . jshell . execution : open
* @ run testng PipeInputStreamTest
*/
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import org.testng.annotations.Test;
import com.sun.tools.javac.util.Pair;
import static org.testng.Assert .*;
@Test
public class PipeInputStreamTest {
public void testReadArrayNotBlocking() throws Exception {
Pair<InputStream, OutputStream> streams = createPipeStream();
InputStream in = streams.fst;
OutputStream out = streams.snd;
out.write('a' );
byte [] data = new byte [12 ];
assertEquals(in.read(data), 1 );
assertEquals(data[0 ], 'a' );
out.write('a' ); out.write('b' ); out.write('c' );
assertEquals(in.read(data), 3 );
assertEquals(data[0 ], 'a' );
assertEquals(data[1 ], 'b' );
assertEquals(data[2 ], 'c' );
}
private Pair<InputStream, OutputStream> createPipeStream() throws Exception {
Class <?> pipeStreamClass = Class .forName("jdk.jshell.execution.PipeInputStream" );
Constructor<?> c = pipeStreamClass.getDeclaredConstructor();
c.setAccessible(true );
Object pipeStream = c.newInstance();
Method createOutputStream = pipeStreamClass.getDeclaredMethod("createOutput" );
createOutputStream.setAccessible(true );
return Pair.of((InputStream) pipeStream, (OutputStream) createOutputStream.invoke(pipeStream));
}
}
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