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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.verifyNoMoreInteractions;
import com.google.protobuf.MessageLite;
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.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnit;
import org.mockito.junit.MockitoRule;
public final class RpcManagerTest {
@Rule public final MockitoRule mockito = MockitoJUnit.rule();
private static final Service SERVICE = new Service("pw.rpc.test1.TheTestService",
Service.unaryMethod("SomeUnary", SomeMessage.class, SomeMessage.class),
Service.serverStreamingMethod("SomeServerStreaming", SomeMessage.class, SomeMessage.class),
Service.clientStreamingMethod("SomeClientStreaming", SomeMessage.class, SomeMessage.class),
Service.bidirectionalStreamingMethod(
"SomeBidiStreaming", SomeMessage.class, SomeMessage.class));
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 int CHANNEL_ID = 555;
@Mock private Channel.Output mockOutput;
@Mock private StreamObserverCall<MessageLite, MessageLite> call;
private PendingRpc rpc;
private RpcManager manager;
@Before
public void setup() {
rpc = PendingRpc.create(new Channel(CHANNEL_ID, mockOutput), SERVICE, METHOD);
manager = new RpcManager();
}
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());
}
@Test
public void start_sendingFails_rpcNotPending() throws Exception {
doThrow(new ChannelOutputException()).when(mockOutput).send(any());
assertThrows(ChannelOutputException.class, () -> manager.start(rpc, call, REQUEST_PAYLOAD));
verify(mockOutput).send(REQUEST);
assertThat(manager.getPending(rpc)).isNull();
}
@Test
public void start_succeeds_rpcIsPending() throws Exception {
assertThat(manager.start(rpc, call, REQUEST_PAYLOAD)).isNull();
assertThat(manager.getPending(rpc)).isSameInstanceAs(call);
}
@Test
public void startThenCancel_rpcNotPending() throws Exception {
assertThat(manager.start(rpc, call, REQUEST_PAYLOAD)).isNull();
assertThat(manager.cancel(rpc)).isSameInstanceAs(call);
assertThat(manager.getPending(rpc)).isNull();
}
@Test
public void startThenCancel_sendsCancelPacket() throws Exception {
assertThat(manager.start(rpc, call, REQUEST_PAYLOAD)).isNull();
assertThat(manager.cancel(rpc)).isEqualTo(call);
verify(mockOutput).send(cancel());
}
@Test
public void startThenClear_sendsNothing() throws Exception {
verifyNoMoreInteractions(mockOutput);
assertThat(manager.start(rpc, call, REQUEST_PAYLOAD)).isNull();
assertThat(manager.clear(rpc)).isEqualTo(call);
}
@Test
public void clear_notPending_returnsNull() {
assertThat(manager.clear(rpc)).isNull();
}
@Test
public void open_sendingFails_rpcIsPending() throws Exception {
doThrow(new ChannelOutputException()).when(mockOutput).send(any());
assertThat(manager.open(rpc, call, REQUEST_PAYLOAD)).isNull();
verify(mockOutput).send(REQUEST);
assertThat(manager.getPending(rpc)).isSameInstanceAs(call);
}
@Test
public void open_success_rpcIsPending() {
assertThat(manager.open(rpc, call, REQUEST_PAYLOAD)).isNull();
assertThat(manager.getPending(rpc)).isSameInstanceAs(call);
}
}
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