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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 com.google.common.util.concurrent.MoreExecutors.directExecutor;
import static org.junit.Assert.assertThrows;
import static org.mockito.Mockito.any;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import com.google.common.collect.ImmutableList;
import com.google.protobuf.ByteString;
import dev.pigweed.pw_rpc.Call.UnaryFuture;
import dev.pigweed.pw_rpc.FutureCall.StreamResponseFuture;
import dev.pigweed.pw_rpc.FutureCall.UnaryResponseFuture;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutionException;
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 FutureCallTest {
@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 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 final PendingRpc rpc = PendingRpc.create(channel, METHOD);
@Test
public void unaryFuture_response_setsValue() throws Exception {
UnaryResponseFuture<SomeMessage, AnotherMessage> call = endpoint.invokeRpc(
CHANNEL_ID, METHOD, UnaryResponseFuture::new, SomeMessage.getDefaultInstance());
AnotherMessage response = AnotherMessage.newBuilder().setResultValue(1138).build();
call.handleUnaryCompleted(response.toByteString(), Status.CANCELLED);
assertThat(call.isDone()).isTrue();
assertThat(call.get()).isEqualTo(UnaryResult.create(response, Status.CANCELLED));
}
@Test
public void unaryFuture_serverError_setsException() throws Exception {
UnaryResponseFuture<SomeMessage, AnotherMessage> call = endpoint.invokeRpc(
CHANNEL_ID, METHOD, UnaryResponseFuture::new, SomeMessage.getDefaultInstance());
call.handleError(Status.NOT_FOUND);
assertThat(call.isDone()).isTrue();
ExecutionException exception = assertThrows(ExecutionException.class, call::get);
assertThat(exception).hasCauseThat().isInstanceOf(RpcError.class);
RpcError error = (RpcError) exception.getCause();
assertThat(error).isNotNull();
assertThat(error.rpc()).isEqualTo(rpc);
assertThat(error.status()).isEqualTo(Status.NOT_FOUND);
}
@Test
public void unaryFuture_cancelOnCall_cancelsTheCallAndFuture() throws Exception {
UnaryFuture<SomeMessage> call = endpoint.invokeRpc(
CHANNEL_ID, METHOD, UnaryResponseFuture::new, SomeMessage.getDefaultInstance());
assertThat(call.cancel()).isTrue();
assertThat(call.isCancelled()).isTrue();
ExecutionException exception = assertThrows(ExecutionException.class, call::get);
assertThat(exception).hasCauseThat().isInstanceOf(RpcError.class);
RpcError error = (RpcError) exception.getCause();
assertThat(error).isNotNull();
assertThat(error.rpc()).isEqualTo(rpc);
assertThat(error.status()).isEqualTo(Status.CANCELLED);
}
@Test
public void unaryFuture_cancelOnFuture_cancelsTheCallAndFuture() throws Exception {
UnaryFuture<SomeMessage> call = endpoint.invokeRpc(
CHANNEL_ID, METHOD, UnaryResponseFuture::new, SomeMessage.getDefaultInstance());
assertThat(call.cancel(true)).isTrue();
assertThat(call.isCancelled()).isTrue();
ExecutionException exception = assertThrows(ExecutionException.class, call::get);
assertThat(exception).hasCauseThat().isInstanceOf(RpcError.class);
RpcError error = (RpcError) exception.getCause();
assertThat(error).isNotNull();
assertThat(error.rpc()).isEqualTo(rpc);
assertThat(error.status()).isEqualTo(Status.CANCELLED);
}
@Test
public void unaryFuture_cancelOnFutureSendFails_cancelsTheCallAndFuture() throws Exception {
UnaryFuture<SomeMessage> call = endpoint.invokeRpc(
CHANNEL_ID, METHOD, UnaryResponseFuture::new, SomeMessage.getDefaultInstance());
doThrow(new ChannelOutputException()).when(mockOutput).send(any());
assertThat(call.cancel(true)).isTrue();
assertThat(call.isCancelled()).isTrue();
ExecutionException exception = assertThrows(ExecutionException.class, call::get);
assertThat(exception).hasCauseThat().isInstanceOf(RpcError.class);
RpcError error = (RpcError) exception.getCause();
assertThat(error).isNotNull();
assertThat(error.rpc()).isEqualTo(rpc);
assertThat(error.status()).isEqualTo(Status.CANCELLED);
}
@Test
public void unaryFuture_multipleResponses_setsException() throws Exception {
UnaryResponseFuture<SomeMessage, AnotherMessage> call = endpoint.invokeRpc(
CHANNEL_ID, METHOD, UnaryResponseFuture::new, SomeMessage.getDefaultInstance());
AnotherMessage response = AnotherMessage.newBuilder().setResultValue(1138).build();
call.doHandleNext(response);
call.handleUnaryCompleted(ByteString.EMPTY, Status.OK);
assertThat(call.isDone()).isTrue();
ExecutionException exception = assertThrows(ExecutionException.class, call::get);
assertThat(exception).hasCauseThat().isInstanceOf(IllegalStateException.class);
}
@Test
public void unaryFuture_addListener_calledOnCompletion() throws Exception {
UnaryResponseFuture<SomeMessage, AnotherMessage> call = endpoint.invokeRpc(
CHANNEL_ID, METHOD, UnaryResponseFuture::new, SomeMessage.getDefaultInstance());
Runnable listener = mock(Runnable.class);
call.addListener(listener, directExecutor());
AnotherMessage response = AnotherMessage.newBuilder().setResultValue(1138).build();
call.handleUnaryCompleted(response.toByteString(), Status.OK);
verify(listener, times(1)).run();
}
@Test
public void unaryFuture_exceptionDuringStart() throws Exception {
ChannelOutputException exceptionToThrow = new ChannelOutputException();
doThrow(exceptionToThrow).when(mockOutput).send(any());
UnaryResponseFuture<SomeMessage, AnotherMessage> call = endpoint.invokeRpc(
CHANNEL_ID, METHOD, UnaryResponseFuture::new, SomeMessage.getDefaultInstance());
assertThat(call.error()).isEqualTo(Status.ABORTED);
ExecutionException exception = assertThrows(ExecutionException.class, call::get);
assertThat(exception).hasCauseThat().isInstanceOf(ChannelOutputException.class);
assertThat(exception.getCause()).isSameInstanceAs(exceptionToThrow);
}
@Test
public void bidirectionalStreamingFuture_responses_setsValue() throws Exception {
List<AnotherMessage> responses = new ArrayList<>();
StreamResponseFuture<SomeMessage, AnotherMessage> call = endpoint.invokeRpc(CHANNEL_ID,
METHOD,
StreamResponseFuture.getFactory(responses::add),
SomeMessage.getDefaultInstance());
AnotherMessage message = AnotherMessage.newBuilder().setResultValue(1138).build();
call.doHandleNext(message);
call.doHandleNext(message);
assertThat(call.isDone()).isFalse();
call.handleStreamCompleted(Status.OK);
assertThat(call.isDone()).isTrue();
assertThat(call.get()).isEqualTo(Status.OK);
assertThat(responses).containsExactly(message, message);
}
@Test
public void bidirectionalStreamingFuture_serverError_setsException() throws Exception {
StreamResponseFuture<SomeMessage, AnotherMessage> call = endpoint.invokeRpc(CHANNEL_ID,
METHOD,
StreamResponseFuture.getFactory(msg -> {}),
SomeMessage.getDefaultInstance());
call.handleError(Status.NOT_FOUND);
assertThat(call.isDone()).isTrue();
ExecutionException exception = assertThrows(ExecutionException.class, call::get);
assertThat(exception).hasCauseThat().isInstanceOf(RpcError.class);
RpcError error = (RpcError) exception.getCause();
assertThat(error).isNotNull();
assertThat(error.rpc()).isEqualTo(rpc);
assertThat(error.status()).isEqualTo(Status.NOT_FOUND);
}
}
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