test/jdk/java/net/httpclient/reactivestreams-tck-tests/BodyPublishersOfSubByteArray.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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import org.reactivestreams.tck.TestEnvironment;
import org.reactivestreams.tck.flow.FlowPublisherVerification;

import java.net.http.HttpRequest.BodyPublishers;
import java.nio.ByteBuffer;
import java.util.concurrent.Flow.Publisher;

/* See TckDriver.java for more information */
public class BodyPublishersOfSubByteArray
        extends FlowPublisherVerification<ByteBuffer> {

    private static final int ELEMENT_SIZE = 16 * 1024;

    public BodyPublishersOfSubByteArray() {
        super(new TestEnvironment(450L));
    }

    @Override
    public Publisher<ByteBuffer> createFlowPublisher(long nElements) {
        int prefixLen = S.randomIntUpTo(13);
        int postfixLen = S.randomIntUpTo(17);
        byte[] b = S.arrayOfNRandomBytes(nElements * ELEMENT_SIZE);
        byte[] contents = new byte[prefixLen + b.length + postfixLen];
        System.arraycopy(b, 0, contents, prefixLen, b.length);
        return BodyPublishers.ofByteArray(contents, prefixLen, b.length);
    }

    @Override
    public Publisher<ByteBuffer> createFailedFlowPublisher() {
        return null;
    }

    @Override
    public long maxElementsFromPublisher() {
        return 21;
    }
}