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// Copyright 2021 The Pigweed 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
//
// https://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 dev.pigweed.pw_rpc;
import static com.google.common.truth.Truth.assertThat;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import com.google.common.collect.ImmutableList;
import dev.pigweed.pw_rpc.internal.Packet.PacketType;
import dev.pigweed.pw_rpc.internal.Packet.RpcPacket;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnit;
import org.mockito.junit.MockitoRule;
public final class StreamObserverCallTest {
@Rule public final MockitoRule mockito = MockitoJUnit.rule();
private static final Service SERVICE = new Service("pw.rpc.test1.TheTestService",
Service.unaryMethod("SomeUnary", SomeMessage.class, AnotherMessage.class),
Service.clientStreamingMethod("SomeClient", SomeMessage.class, AnotherMessage.class),
Service.bidirectionalStreamingMethod(
"SomeBidirectional", SomeMessage.class, AnotherMessage.class));
private static final Method METHOD = SERVICE.method("SomeUnary");
private static final int CHANNEL_ID = 555;
@Mock private StreamObserver<AnotherMessage> observer;
@Mock private Channel.Output mockOutput;
private final Channel channel = new Channel(CHANNEL_ID, packet -> mockOutput.send(packet));
private final Endpoint endpoint = new Endpoint(ImmutableList.of(channel));
private StreamObserverCall<SomeMessage, AnotherMessage> streamObserverCall;
private static byte[] cancel() {
return packetBuilder()
.setType(PacketType.CLIENT_ERROR)
.setStatus(Status.CANCELLED.code())
.build()
.toByteArray();
}
private static RpcPacket.Builder packetBuilder() {
return RpcPacket.newBuilder()
.setChannelId(CHANNEL_ID)
.setServiceId(SERVICE.id())
.setMethodId(METHOD.id());
}
@Before
public void createCall() throws Exception {
streamObserverCall =
endpoint.invokeRpc(CHANNEL_ID, METHOD, StreamObserverCall.getFactory(observer), null);
}
@Test
public void startsActive() {
assertThat(streamObserverCall.active()).isTrue();
}
@Test
public void startsWithNullStatus() {
assertThat(streamObserverCall.status()).isNull();
}
@Test
public void cancel_sendsCancelPacket() throws Exception {
streamObserverCall.cancel();
verify(mockOutput).send(cancel());
}
@Test
public void cancel_deactivates() throws Exception {
streamObserverCall.cancel();
assertThat(streamObserverCall.active()).isFalse();
}
@Test
public void abandon_doesNotSendCancelPacket() throws Exception {
streamObserverCall.abandon();
verify(mockOutput, never()).send(cancel());
}
@Test
public void abandon_deactivates() {
streamObserverCall.abandon();
assertThat(streamObserverCall.active()).isFalse();
}
@Test
public void send_sendsClientStreamPacket() throws Exception {
SomeMessage request = SomeMessage.newBuilder().setMagicNumber(123).build();
streamObserverCall.write(request);
verify(mockOutput)
.send(packetBuilder()
.setType(PacketType.CLIENT_STREAM)
.setPayload(request.toByteString())
.build()
.toByteArray());
}
@Test
public void send_raisesExceptionIfClosed() throws Exception {
streamObserverCall.cancel();
assertThat(streamObserverCall.write(SomeMessage.getDefaultInstance())).isFalse();
}
@Test
public void finish_clientStreamEndPacket() throws Exception {
streamObserverCall.finish();
verify(mockOutput)
.send(packetBuilder().setType(PacketType.CLIENT_STREAM_END).build().toByteArray());
}
@Test
public void onNext_callsObserverIfActive() {
streamObserverCall.handleNext(AnotherMessage.getDefaultInstance().toByteString());
verify(observer).onNext(AnotherMessage.getDefaultInstance());
}
@Test
public void callDispatcher_onCompleted_callsObserver() {
streamObserverCall.handleStreamCompleted(Status.ABORTED);
verify(observer).onCompleted(Status.ABORTED);
}
@Test
public void callDispatcher_onCompleted_setsActiveAndStatus() {
streamObserverCall.handleStreamCompleted(Status.ABORTED);
verify(observer).onCompleted(Status.ABORTED);
assertThat(streamObserverCall.active()).isFalse();
assertThat(streamObserverCall.status()).isEqualTo(Status.ABORTED);
}
@Test
public void callDispatcher_onError_callsObserver() {
streamObserverCall.handleError(Status.NOT_FOUND);
verify(observer).onError(Status.NOT_FOUND);
}
@Test
public void callDispatcher_onError_deactivates() {
streamObserverCall.handleError(Status.ABORTED);
verify(observer).onError(Status.ABORTED);
assertThat(streamObserverCall.active()).isFalse();
assertThat(streamObserverCall.status()).isNull();
}
}
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