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AbstractServerStreamTest.java
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AbstractServerStreamTest.java
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/*
* Copyright 2015 The gRPC Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.grpc.internal;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.mockito.AdditionalAnswers.delegatesTo;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyBoolean;
import static org.mockito.ArgumentMatchers.anyInt;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.ArgumentMatchers.same;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.reset;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import com.google.common.util.concurrent.SettableFuture;
import io.grpc.InternalStatus;
import io.grpc.Metadata;
import io.grpc.Status;
import io.grpc.StatusRuntimeException;
import io.grpc.internal.AbstractServerStream.TransportState;
import io.grpc.internal.MessageFramerTest.ByteWritableBuffer;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.LinkedList;
import java.util.Queue;
import java.util.concurrent.TimeUnit;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import org.mockito.ArgumentCaptor;
/**
* Tests for {@link AbstractServerStream}.
*/
@RunWith(JUnit4.class)
public class AbstractServerStreamTest {
private static final int TIMEOUT_MS = 1000;
private static final int MAX_MESSAGE_SIZE = 100;
@SuppressWarnings("deprecation") // https://github.com/grpc/grpc-java/issues/7467
@Rule public final ExpectedException thrown = ExpectedException.none();
private final WritableBufferAllocator allocator = new WritableBufferAllocator() {
@Override
public WritableBuffer allocate(int capacityHint) {
return new ByteWritableBuffer(capacityHint);
}
};
private AbstractServerStream.Sink sink = mock(AbstractServerStream.Sink.class);
private TransportTracer transportTracer;
private AbstractServerStreamBase stream;
private final ArgumentCaptor<Metadata> metadataCaptor = ArgumentCaptor.forClass(Metadata.class);
@Before
public void setUp() {
transportTracer = new TransportTracer();
stream = new AbstractServerStreamBase(
allocator,
sink,
new AbstractServerStreamBase.TransportState(MAX_MESSAGE_SIZE, transportTracer));
}
/**
* Test for issue https://github.com/grpc/grpc-java/issues/1795
*/
@Test
public void frameShouldBeIgnoredAfterDeframerClosed() {
final Queue<InputStream> streamListenerMessageQueue = new LinkedList<>();
stream.transportState().setListener(new ServerStreamListenerBase() {
@Override
public void messagesAvailable(MessageProducer producer) {
InputStream message;
while ((message = producer.next()) != null) {
streamListenerMessageQueue.add(message);
}
}
});
ReadableBuffer buffer = mock(ReadableBuffer.class);
// Close the deframer
stream.close(Status.OK, new Metadata());
stream.transportState().complete();
// Frame received after deframer closed, should be ignored and not trigger an exception
stream.transportState().inboundDataReceived(buffer, true);
verify(buffer).close();
assertNull("no message expected", streamListenerMessageQueue.poll());
}
@Test
public void noHalfCloseListenerOnCancellation() throws Exception {
final Queue<InputStream> streamListenerMessageQueue = new LinkedList<>();
final SettableFuture<Status> closedFuture = SettableFuture.create();
stream.transportState().setListener(new ServerStreamListenerBase() {
@Override
public void messagesAvailable(StreamListener.MessageProducer producer) {
InputStream message;
while ((message = producer.next()) != null) {
streamListenerMessageQueue.add(message);
}
}
@Override
public void halfClosed() {
if (streamListenerMessageQueue.isEmpty()) {
throw new StatusRuntimeException(Status.INTERNAL.withDescription(
"Half close without request"));
}
}
@Override
public void closed(Status status) {
closedFuture.set(status);
}
});
ReadableBuffer buffer = mock(ReadableBuffer.class);
when(buffer.readableBytes()).thenReturn(1);
stream.transportState().inboundDataReceived(buffer, true);
Status cancel = Status.CANCELLED.withDescription("DEADLINE EXCEEDED");
stream.transportState().transportReportStatus(cancel);
assertEquals(cancel, closedFuture.get(TIMEOUT_MS, TimeUnit.MILLISECONDS));
verify(buffer).close();
}
@Test
public void queuedBytesInDeframerShouldNotBlockComplete() throws Exception {
final SettableFuture<Status> closedFuture = SettableFuture.create();
stream
.transportState()
.setListener(
new ServerStreamListenerBase() {
@Override
public void closed(Status status) {
closedFuture.set(status);
}
});
// Queue bytes in deframer
stream.transportState().inboundDataReceived(ReadableBuffers.wrap(new byte[] {1}), false);
stream.close(Status.OK, new Metadata());
stream.transportState().complete();
assertEquals(Status.OK, closedFuture.get(TIMEOUT_MS, TimeUnit.MILLISECONDS));
}
@Test
public void queuedBytesInDeframerShouldNotBlockTransportReportStatus() throws Exception {
final SettableFuture<Status> closedFuture = SettableFuture.create();
stream
.transportState()
.setListener(
new ServerStreamListenerBase() {
@Override
public void closed(Status status) {
closedFuture.set(status);
}
});
// Queue bytes in deframer
stream.transportState().inboundDataReceived(ReadableBuffers.wrap(new byte[] {1}), false);
stream.transportState().transportReportStatus(Status.CANCELLED);
assertEquals(Status.CANCELLED, closedFuture.get(TIMEOUT_MS, TimeUnit.MILLISECONDS));
}
@Test
public void partialMessageAtEndOfStreamShouldFail() throws Exception {
final SettableFuture<Status> closedFuture = SettableFuture.create();
stream
.transportState()
.setListener(
new ServerStreamListenerBase() {
@Override
public void closed(Status status) {
closedFuture.set(status);
}
});
// Queue a partial message in the deframer
stream.transportState().inboundDataReceived(ReadableBuffers.wrap(new byte[] {1}), true);
stream.request(1);
Status status = closedFuture.get(TIMEOUT_MS, TimeUnit.MILLISECONDS);
assertEquals(Status.INTERNAL.getCode(), status.getCode());
assertEquals("Encountered end-of-stream mid-frame", status.getDescription());
}
/**
* Test for issue https://github.com/grpc/grpc-java/issues/615
*/
@Test
public void completeWithoutClose() {
stream.transportState().setListener(new ServerStreamListenerBase());
// Test that it doesn't throw an exception
stream.close(Status.OK, new Metadata());
stream.transportState().complete();
}
@Test
public void setListener_setOnlyOnce() {
TransportState state = stream.transportState();
state.setListener(new ServerStreamListenerBase());
thrown.expect(IllegalStateException.class);
state.setListener(new ServerStreamListenerBase());
}
@Test
public void listenerReady_onlyOnce() {
stream.transportState().setListener(new ServerStreamListenerBase());
stream.transportState().onStreamAllocated();
TransportState state = stream.transportState();
thrown.expect(IllegalStateException.class);
state.onStreamAllocated();
}
@Test
public void listenerReady_readyCalled() {
ServerStreamListener streamListener = mock(ServerStreamListener.class);
stream.transportState().setListener(streamListener);
stream.transportState().onStreamAllocated();
verify(streamListener).onReady();
}
@Test
public void setListener_failsOnNull() {
TransportState state = stream.transportState();
thrown.expect(NullPointerException.class);
state.setListener(null);
}
// TODO(ericgribkoff) This test is only valid if deframeInTransportThread=true, as otherwise the
// message is queued.
/*
@Test
public void messageRead_listenerCalled() {
final Queue<InputStream> streamListenerMessageQueue = new LinkedList<InputStream>();
stream.transportState().setListener(new ServerStreamListenerBase() {
@Override
public void messagesAvailable(MessageProducer producer) {
InputStream message;
while ((message = producer.next()) != null) {
streamListenerMessageQueue.add(message);
}
}
});
// Normally called by a deframe event.
stream.transportState().messageRead(new ByteArrayInputStream(new byte[]{}));
assertNotNull(streamListenerMessageQueue.poll());
}
*/
@Test
public void writeHeaders_failsOnNullHeaders() {
thrown.expect(NullPointerException.class);
stream.writeHeaders(null);
}
@Test
public void writeHeaders() {
Metadata headers = new Metadata();
stream.writeHeaders(headers);
verify(sink).writeHeaders(same(headers));
}
@Test
public void writeMessage_dontWriteDuplicateHeaders() {
stream.writeHeaders(new Metadata());
stream.writeMessage(new ByteArrayInputStream(new byte[]{}));
// Make sure it wasn't called twice
verify(sink).writeHeaders(any(Metadata.class));
}
@Test
public void writeMessage_ignoreIfFramerClosed() {
stream.writeHeaders(new Metadata());
stream.endOfMessages();
reset(sink);
stream.writeMessage(new ByteArrayInputStream(new byte[]{}));
verify(sink, never()).writeFrame(any(WritableBuffer.class), anyBoolean(), anyInt());
}
@Test
public void writeMessage() {
stream.writeHeaders(new Metadata());
stream.writeMessage(new ByteArrayInputStream(new byte[]{}));
stream.flush();
verify(sink).writeFrame(any(WritableBuffer.class), eq(true), eq(1));
}
@Test
public void writeMessage_closesStream() throws Exception {
stream.writeHeaders(new Metadata());
InputStream input = mock(InputStream.class, delegatesTo(new ByteArrayInputStream(new byte[1])));
stream.writeMessage(input);
verify(input).close();
}
@Test
public void close_failsOnNullStatus() {
thrown.expect(NullPointerException.class);
stream.close(null, new Metadata());
}
@Test
public void close_failsOnNullMetadata() {
thrown.expect(NullPointerException.class);
stream.close(Status.INTERNAL, null);
}
@Test
public void close_sendsTrailers() {
Metadata trailers = new Metadata();
stream.close(Status.INTERNAL, trailers);
verify(sink).writeTrailers(any(Metadata.class), eq(false), eq(Status.INTERNAL));
}
@Test
public void close_sendTrailersClearsReservedFields() {
// stream actually mutates trailers, so we can't check that the fields here are the same as
// the captured ones.
Metadata trailers = new Metadata();
trailers.put(InternalStatus.CODE_KEY, Status.OK);
trailers.put(InternalStatus.MESSAGE_KEY, "Everything's super.");
Status closeStatus = Status.INTERNAL.withDescription("bad");
stream.close(closeStatus, trailers);
verify(sink).writeTrailers(metadataCaptor.capture(), eq(false), eq(closeStatus));
assertEquals(
Status.Code.INTERNAL, metadataCaptor.getValue().get(InternalStatus.CODE_KEY).getCode());
assertEquals("bad", metadataCaptor.getValue().get(InternalStatus.MESSAGE_KEY));
}
private static class ServerStreamListenerBase implements ServerStreamListener {
@Override
public void messagesAvailable(MessageProducer producer) {
InputStream message;
while ((message = producer.next()) != null) {
try {
message.close();
} catch (IOException e) {
// Continue to close other messages
}
}
}
@Override
public void onReady() {}
@Override
public void halfClosed() {}
@Override
public void closed(Status status) {}
}
private static class AbstractServerStreamBase extends AbstractServerStream {
private final Sink sink;
private final AbstractServerStream.TransportState state;
protected AbstractServerStreamBase(WritableBufferAllocator bufferAllocator, Sink sink,
AbstractServerStream.TransportState state) {
super(bufferAllocator, StatsTraceContext.NOOP);
this.sink = sink;
this.state = state;
}
@Override
protected Sink abstractServerStreamSink() {
return sink;
}
@Override
protected AbstractServerStream.TransportState transportState() {
return state;
}
static class TransportState extends AbstractServerStream.TransportState {
protected TransportState(int maxMessageSize, TransportTracer transportTracer) {
super(maxMessageSize, StatsTraceContext.NOOP, transportTracer);
}
@Override
public void deframeFailed(Throwable cause) {
Status status = Status.fromThrowable(cause);
transportReportStatus(status);
}
@Override
public void bytesRead(int processedBytes) {}
@Override
public void runOnTransportThread(Runnable r) {
r.run();
}
}
@Override
public int streamId() {
return -1;
}
}
}