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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.
#include "pw_rpc/internal/fake_channel_output.h"
#include <array>
#include <cstddef>
#include <memory>
#include "gtest/gtest.h"
#include "pw_rpc/internal/channel.h"
#include "pw_rpc/internal/lock.h"
#include "pw_rpc/internal/packet.h"
namespace pw::rpc::internal::test {
namespace {
constexpr uint32_t kChannelId = 1;
constexpr uint32_t kServiceId = 1;
constexpr uint32_t kMethodId = 1;
constexpr uint32_t kCallId = 0;
constexpr std::array<std::byte, 3> kPayload = {
std::byte(1), std::byte(2), std::byte(3)};
class TestFakeChannelOutput final : public FakeChannelOutputBuffer<9, 128> {
public:
TestFakeChannelOutput() = default;
const ConstByteSpan& last_response(MethodType type) {
return payloads(type, kChannelId, kServiceId, kMethodId).back();
}
size_t total_payloads(MethodType type) {
return payloads(type, kChannelId, kServiceId, kMethodId).size();
}
};
TEST(FakeChannelOutput, SendAndClear) {
constexpr MethodType type = MethodType::kServerStreaming;
TestFakeChannelOutput output;
Channel channel(kChannelId, &output);
const internal::Packet server_stream_packet(PacketType::SERVER_STREAM,
kChannelId,
kServiceId,
kMethodId,
kCallId,
kPayload);
LockGuard lock(rpc_lock());
ASSERT_EQ(channel.Send(server_stream_packet), OkStatus());
ASSERT_EQ(output.last_response(type).size(), kPayload.size());
EXPECT_EQ(
std::memcmp(
output.last_response(type).data(), kPayload.data(), kPayload.size()),
0);
EXPECT_EQ(output.total_payloads(type), 1u);
EXPECT_EQ(output.total_packets(), 1u);
EXPECT_FALSE(output.done());
output.clear();
EXPECT_EQ(output.total_payloads(type), 0u);
EXPECT_EQ(output.total_packets(), 0u);
EXPECT_FALSE(output.done());
}
TEST(FakeChannelOutput, SendAndFakeFutureResults) {
constexpr MethodType type = MethodType::kUnary;
TestFakeChannelOutput output;
Channel channel(kChannelId, &output);
const internal::Packet response_packet(PacketType::RESPONSE,
kChannelId,
kServiceId,
kMethodId,
kCallId,
kPayload);
LockGuard lock(rpc_lock());
EXPECT_EQ(channel.Send(response_packet), OkStatus());
EXPECT_EQ(output.total_payloads(type), 1u);
EXPECT_EQ(output.total_packets(), 1u);
EXPECT_TRUE(output.done());
// Multiple calls will return the same error status.
output.set_send_status(Status::Unknown());
EXPECT_EQ(channel.Send(response_packet), Status::Unknown());
EXPECT_EQ(channel.Send(response_packet), Status::Unknown());
EXPECT_EQ(channel.Send(response_packet), Status::Unknown());
EXPECT_EQ(output.total_payloads(type), 1u);
EXPECT_EQ(output.total_packets(), 1u);
// Turn off error status behavior.
output.set_send_status(OkStatus());
EXPECT_EQ(channel.Send(response_packet), OkStatus());
EXPECT_EQ(output.total_payloads(type), 2u);
EXPECT_EQ(output.total_packets(), 2u);
const internal::Packet server_stream_packet(PacketType::SERVER_STREAM,
kChannelId,
kServiceId,
kMethodId,
kCallId,
kPayload);
EXPECT_EQ(channel.Send(server_stream_packet), OkStatus());
ASSERT_EQ(output.last_response(type).size(), kPayload.size());
EXPECT_EQ(
std::memcmp(
output.last_response(type).data(), kPayload.data(), kPayload.size()),
0);
EXPECT_EQ(output.total_payloads(type), 2u);
EXPECT_EQ(output.total_packets(), 3u);
EXPECT_TRUE(output.done());
}
TEST(FakeChannelOutput, SendAndFakeSingleResult) {
constexpr MethodType type = MethodType::kUnary;
TestFakeChannelOutput output;
Channel channel(kChannelId, &output);
const internal::Packet response_packet(PacketType::RESPONSE,
kChannelId,
kServiceId,
kMethodId,
kCallId,
kPayload);
// Multiple calls will return the same error status.
const int packet_count_fail = 4;
output.set_send_status(Status::Unknown(), packet_count_fail);
LockGuard lock(rpc_lock());
for (int i = 0; i < packet_count_fail; ++i) {
EXPECT_EQ(channel.Send(response_packet), OkStatus());
}
EXPECT_EQ(channel.Send(response_packet), Status::Unknown());
for (int i = 0; i < packet_count_fail; ++i) {
EXPECT_EQ(channel.Send(response_packet), OkStatus());
}
const size_t total_response_packets =
static_cast<size_t>(2 * packet_count_fail);
EXPECT_EQ(output.total_payloads(type), total_response_packets);
EXPECT_EQ(output.total_packets(), total_response_packets);
// Turn off error status behavior.
output.set_send_status(OkStatus());
EXPECT_EQ(channel.Send(response_packet), OkStatus());
EXPECT_EQ(output.total_payloads(type), total_response_packets + 1);
EXPECT_EQ(output.total_packets(), total_response_packets + 1);
}
TEST(FakeChannelOutput, SendResponseUpdated) {
TestFakeChannelOutput output;
Channel channel(kChannelId, &output);
const internal::Packet response_packet(PacketType::RESPONSE,
kChannelId,
kServiceId,
kMethodId,
kCallId,
kPayload);
LockGuard lock(rpc_lock());
ASSERT_EQ(channel.Send(response_packet), OkStatus());
ASSERT_EQ(output.last_response(MethodType::kUnary).size(), kPayload.size());
EXPECT_EQ(std::memcmp(output.last_response(MethodType::kUnary).data(),
kPayload.data(),
kPayload.size()),
0);
EXPECT_EQ(output.total_payloads(MethodType::kUnary), 1u);
EXPECT_EQ(output.total_packets(), 1u);
EXPECT_TRUE(output.done());
output.clear();
const internal::Packet packet_empty_payload(
PacketType::RESPONSE, kChannelId, kServiceId, kMethodId, kCallId, {});
EXPECT_EQ(channel.Send(packet_empty_payload), OkStatus());
EXPECT_EQ(output.last_response(MethodType::kUnary).size(), 0u);
EXPECT_EQ(output.total_payloads(MethodType::kUnary), 1u);
EXPECT_EQ(output.total_packets(), 1u);
EXPECT_TRUE(output.done());
const internal::Packet server_stream_packet(PacketType::SERVER_STREAM,
kChannelId,
kServiceId,
kMethodId,
kCallId,
kPayload);
ASSERT_EQ(channel.Send(server_stream_packet), OkStatus());
ASSERT_EQ(output.total_payloads(MethodType::kServerStreaming), 1u);
ASSERT_EQ(output.last_response(MethodType::kServerStreaming).size(),
kPayload.size());
EXPECT_EQ(
std::memcmp(output.last_response(MethodType::kServerStreaming).data(),
kPayload.data(),
kPayload.size()),
0);
EXPECT_EQ(output.total_payloads(MethodType::kServerStreaming), 1u);
EXPECT_EQ(output.total_packets(), 2u);
EXPECT_TRUE(output.done());
}
} // namespace
} // namespace pw::rpc::internal::test
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