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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.junit.Assert.assertThrows;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoInteractions;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import com.google.common.collect.ImmutableList;
import com.google.protobuf.MessageLite;
import dev.pigweed.pw_rpc.internal.Packet.PacketType;
import dev.pigweed.pw_rpc.internal.Packet.RpcPacket;
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 EndpointTest {
@Rule public final MockitoRule mockito = MockitoJUnit.rule();
private static final Service SERVICE = new Service("pw.rpc.test1.TheTestService",
Service.unaryMethod("SomeUnary", SomeMessage.parser(), SomeMessage.parser()),
Service.serverStreamingMethod(
"SomeServerStreaming", SomeMessage.parser(), SomeMessage.parser()),
Service.clientStreamingMethod(
"SomeClientStreaming", SomeMessage.parser(), SomeMessage.parser()),
Service.bidirectionalStreamingMethod(
"SomeBidiStreaming", SomeMessage.parser(), SomeMessage.parser()));
private static final Method METHOD = SERVICE.method("SomeUnary");
private static final SomeMessage REQUEST_PAYLOAD =
SomeMessage.newBuilder().setMagicNumber(1337).build();
private static final byte[] REQUEST = request(REQUEST_PAYLOAD);
private static final AnotherMessage RESPONSE_PAYLOAD =
AnotherMessage.newBuilder().setPayload("hello").build();
private static final int CHANNEL_ID = 555;
@Mock private Channel.Output mockOutput;
@Mock private StreamObserver<MessageLite> callEvents;
private final Channel channel = new Channel(CHANNEL_ID, bytes -> mockOutput.send(bytes));
private final Endpoint endpoint = new Endpoint(ImmutableList.of(channel));
private static byte[] request(MessageLite payload) {
return packetBuilder()
.setType(PacketType.REQUEST)
.setPayload(payload.toByteString())
.build()
.toByteArray();
}
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());
}
private AbstractCall<MessageLite, MessageLite> createCall(Endpoint endpoint, PendingRpc rpc) {
return StreamObserverCall.getFactory(callEvents).apply(endpoint, rpc);
}
@Test
public void start_succeeds_rpcIsPending() throws Exception {
AbstractCall<MessageLite, MessageLite> call =
endpoint.invokeRpc(CHANNEL_ID, METHOD, this::createCall, REQUEST_PAYLOAD);
verify(mockOutput).send(REQUEST);
assertThat(endpoint.abandon(call)).isTrue();
}
@Test
public void start_sendingFails_callsHandleError() throws Exception {
doThrow(new ChannelOutputException()).when(mockOutput).send(any());
assertThrows(ChannelOutputException.class,
() -> endpoint.invokeRpc(CHANNEL_ID, METHOD, this::createCall, REQUEST_PAYLOAD));
verify(mockOutput).send(REQUEST);
}
@Test
public void abandon_rpcNoLongerPending() throws Exception {
AbstractCall<MessageLite, MessageLite> call =
endpoint.invokeRpc(CHANNEL_ID, METHOD, this::createCall, REQUEST_PAYLOAD);
assertThat(endpoint.abandon(call)).isTrue();
assertThat(endpoint.abandon(call)).isFalse();
}
@Test
public void abandon_sendsNoPackets() throws Exception {
AbstractCall<MessageLite, MessageLite> call =
endpoint.invokeRpc(CHANNEL_ID, METHOD, this::createCall, REQUEST_PAYLOAD);
verify(mockOutput).send(REQUEST);
verifyNoMoreInteractions(mockOutput);
assertThat(endpoint.abandon(call)).isTrue();
}
@Test
public void cancel_rpcNoLongerPending() throws Exception {
AbstractCall<MessageLite, MessageLite> call =
endpoint.invokeRpc(CHANNEL_ID, METHOD, this::createCall, REQUEST_PAYLOAD);
assertThat(endpoint.cancel(call)).isTrue();
assertThat(endpoint.abandon(call)).isFalse();
}
@Test
public void cancel_sendsCancelPacket() throws Exception {
AbstractCall<MessageLite, MessageLite> call =
endpoint.invokeRpc(CHANNEL_ID, METHOD, this::createCall, REQUEST_PAYLOAD);
assertThat(endpoint.cancel(call)).isTrue();
verify(mockOutput).send(cancel());
}
@Test
public void open_sendsNoPacketsButRpcIsPending() {
AbstractCall<MessageLite, MessageLite> call =
endpoint.openRpc(CHANNEL_ID, METHOD, this::createCall);
assertThat(call.active()).isTrue();
assertThat(endpoint.abandon(call)).isTrue();
verifyNoInteractions(mockOutput);
}
@Test
public void ignoresActionsIfCallIsNotPending() throws Exception {
AbstractCall<MessageLite, MessageLite> call =
createCall(endpoint, PendingRpc.create(channel, METHOD));
assertThat(endpoint.cancel(call)).isFalse();
assertThat(endpoint.abandon(call)).isFalse();
assertThat(endpoint.clientStream(call, REQUEST_PAYLOAD)).isFalse();
assertThat(endpoint.clientStreamEnd(call)).isFalse();
}
@Test
public void ignoresPacketsIfCallIsNotPending() throws Exception {
AbstractCall<MessageLite, MessageLite> call =
createCall(endpoint, PendingRpc.create(channel, METHOD));
assertThat(endpoint.cancel(call)).isFalse();
assertThat(endpoint.abandon(call)).isFalse();
assertThat(endpoint.processClientPacket(call.rpc().method(),
packetBuilder()
.setType(PacketType.SERVER_STREAM)
.setPayload(RESPONSE_PAYLOAD.toByteString())
.build()))
.isTrue();
assertThat(endpoint.processClientPacket(call.rpc().method(),
packetBuilder()
.setType(PacketType.RESPONSE)
.setPayload(RESPONSE_PAYLOAD.toByteString())
.build()))
.isTrue();
assertThat(endpoint.processClientPacket(call.rpc().method(),
packetBuilder()
.setType(PacketType.SERVER_ERROR)
.setStatus(Status.ABORTED.code())
.build()))
.isTrue();
assertThat(endpoint.processClientPacket(call.rpc().method(),
packetBuilder()
.setType(PacketType.CLIENT_STREAM)
.setPayload(REQUEST_PAYLOAD.toByteString())
.build()))
.isTrue();
assertThat(endpoint.processClientPacket(call.rpc().method(),
packetBuilder().setType(PacketType.CLIENT_REQUEST_COMPLETION).build()))
.isTrue();
assertThat(endpoint.processClientPacket(call.rpc().method(),
packetBuilder()
.setType(PacketType.CLIENT_ERROR)
.setStatus(Status.ABORTED.code())
.build()))
.isTrue();
verifyNoInteractions(callEvents);
}
}
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