ResetStreamTest.java

package org.eclipse.jetty.spdy;

import static org.hamcrest.Matchers.is;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;

import org.eclipse.jetty.spdy.api.DataInfo;
import org.eclipse.jetty.spdy.api.Handler;
import org.eclipse.jetty.spdy.api.RstInfo;
import org.eclipse.jetty.spdy.api.Session;
import org.eclipse.jetty.spdy.api.SessionFrameListener;
import org.eclipse.jetty.spdy.api.Stream;
import org.eclipse.jetty.spdy.api.StreamFrameListener;
import org.eclipse.jetty.spdy.api.StreamStatus;
import org.eclipse.jetty.spdy.api.StringDataInfo;
import org.eclipse.jetty.spdy.api.SynInfo;
import org.eclipse.jetty.spdy.api.server.ServerSessionFrameListener;
import org.junit.Test;

public class ResetStreamTest extends AbstractTest
{
    @Test
    public void testResetStreamIsRemoved() throws Exception
    {
        Session session = startClient(startServer(new ServerSessionFrameListener.Adapter()),null);

        Stream stream = session.syn(new SynInfo(false),null).get(5,TimeUnit.SECONDS);
        session.rst(new RstInfo(stream.getId(),StreamStatus.CANCEL_STREAM)).get(5,TimeUnit.SECONDS);

        assertEquals("session expected to contain 0 streams",0,session.getStreams().size());
    }

    @Test
    public void testRefusedStreamIsRemoved() throws Exception
    {
        final AtomicReference<Session> serverSessionRef = new AtomicReference<>();
        final CountDownLatch synLatch = new CountDownLatch(1);
        final CountDownLatch rstLatch = new CountDownLatch(1);
        Session clientSession = startClient(startServer(new ServerSessionFrameListener.Adapter()
        {
            @Override
            public StreamFrameListener onSyn(Stream stream, SynInfo synInfo)
            {
                Session serverSession = stream.getSession();
                serverSessionRef.set(serverSession);
                serverSession.rst(new RstInfo(stream.getId(),StreamStatus.REFUSED_STREAM));
                synLatch.countDown();
                return null;
            }
        }),new SessionFrameListener.Adapter()
        {
            @Override
            public void onRst(Session session, RstInfo rstInfo)
            {
                rstLatch.countDown();
            }
        });

        Stream stream = clientSession.syn(new SynInfo(false),null).get(5,TimeUnit.SECONDS);

        assertTrue("syncLatch didn't count down",synLatch.await(5,TimeUnit.SECONDS));
        Session serverSession = serverSessionRef.get();
        assertEquals("serverSession expected to contain 0 streams",0,serverSession.getStreams().size());

        assertTrue("rstLatch didn't count down",rstLatch.await(5,TimeUnit.SECONDS));
        // Need to sleep a while to give the chance to the implementation to remove the stream
        TimeUnit.SECONDS.sleep(1);
        assertTrue("stream is expected to be reset",stream.isReset());
        assertEquals("clientSession expected to contain 0 streams",0,clientSession.getStreams().size());
    }

    @Test
    public void testRefusedStreamIgnoresData() throws Exception
    {
        final CountDownLatch synLatch = new CountDownLatch(1);
        final CountDownLatch dataLatch = new CountDownLatch(1);
        final CountDownLatch rstLatch = new CountDownLatch(1);
        Session session = startClient(startServer(new ServerSessionFrameListener.Adapter()
        {
            @Override
            public StreamFrameListener onSyn(Stream stream, SynInfo synInfo)
            {
                try
                {
                    // Refuse the stream, we must ignore data frames
                    assertTrue(synLatch.await(5,TimeUnit.SECONDS));
                    stream.getSession().rst(new RstInfo(stream.getId(),StreamStatus.REFUSED_STREAM));
                    return new StreamFrameListener.Adapter()
                    {
                        @Override
                        public void onData(Stream stream, DataInfo dataInfo)
                        {
                            dataLatch.countDown();
                        }
                    };
                }
                catch (InterruptedException x)
                {
                    x.printStackTrace();
                    return null;
                }
            }
        }),new SessionFrameListener.Adapter()
        {
            @Override
            public void onRst(Session session, RstInfo rstInfo)
            {
                rstLatch.countDown();
            }
        });

        Stream stream = session.syn(new SynInfo(false),null).get(5,TimeUnit.SECONDS);
        stream.data(new StringDataInfo("data",true),5,TimeUnit.SECONDS,new Handler.Adapter<Void>()
        {
            @Override
            public void completed(Void context)
            {
                synLatch.countDown();
            }
        });

        assertTrue("rstLatch didn't count down",rstLatch.await(5,TimeUnit.SECONDS));
        assertTrue("stream is expected to be reset",stream.isReset());
        assertFalse("dataLatch shouln't be count down",dataLatch.await(1,TimeUnit.SECONDS));
    }

    @Test
    public void testResetAfterServerReceivedFirstDataFrameAndSecondDataFrameFails() throws Exception
    {
        final CountDownLatch synLatch = new CountDownLatch(1);
        final CountDownLatch dataLatch = new CountDownLatch(1);
        final CountDownLatch rstLatch = new CountDownLatch(1);
        final CountDownLatch failLatch = new CountDownLatch(1);
        Session session = startClient(startServer(new ServerSessionFrameListener.Adapter()
        {
            @Override
            public StreamFrameListener onSyn(Stream stream, SynInfo synInfo)
            {
                synLatch.countDown();
                return new StreamFrameListener.Adapter()
                {
                    @Override
                    public void onData(Stream stream, DataInfo dataInfo)
                    {
                        dataLatch.countDown();
                        stream.getSession().rst(new RstInfo(stream.getId(),StreamStatus.REFUSED_STREAM));
                    }
                };
            }
        }),new SessionFrameListener.Adapter()
        {
            @Override
            public void onRst(Session session, RstInfo rstInfo)
            {
                rstLatch.countDown();
            }
        });

        Stream stream = session.syn(new SynInfo(false),null).get(5,TimeUnit.SECONDS);
        assertThat("syn is received by server", synLatch.await(5,TimeUnit.SECONDS),is(true));
        stream.data(new StringDataInfo("data",false),5,TimeUnit.SECONDS,null);
        assertThat("stream is reset",rstLatch.await(5,TimeUnit.SECONDS),is(true));
        stream.data(new StringDataInfo("2nd dataframe",false),5L,TimeUnit.SECONDS,new Handler.Adapter<Void>()
        {
            @Override
            public void failed(Throwable x)
            {
                failLatch.countDown();
            }
        });

        assertThat("2nd data call failed",failLatch.await(5,TimeUnit.SECONDS),is(true));
        assertThat("stream is reset",stream.isReset(),is(true));
    }

    // TODO: If server already received 2nd dataframe after it rst, it should ignore it. Not easy to do.

}