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// Copyright 2020 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/channel.h"
#include "gtest/gtest.h"
#include "pw_rpc/internal/packet.h"
#include "pw_rpc_private/internal_test_utils.h"
namespace pw::rpc::internal {
namespace {
using std::byte;
TEST(ChannelOutput, Name) {
class NameTester : public ChannelOutput {
public:
NameTester(const char* name) : ChannelOutput(name) {}
std::span<std::byte> AcquireBuffer() override { return {}; }
Status SendAndReleaseBuffer(size_t) override { return Status::Ok(); }
};
EXPECT_STREQ("hello_world", NameTester("hello_world").name());
EXPECT_EQ(nullptr, NameTester(nullptr).name());
}
constexpr Packet kTestPacket(PacketType::RESPONSE, 1, 42, 100);
const size_t kReservedSize = 2 /* type */ + 2 /* channel */ + 5 /* service */ +
5 /* method */ + 2 /* payload key */ +
2 /* status */;
TEST(Channel, TestPacket_ReservedSizeMatchesMinEncodedSizeBytes) {
EXPECT_EQ(kReservedSize, kTestPacket.MinEncodedSizeBytes());
}
TEST(Channel, OutputBuffer_EmptyBuffer) {
TestOutput<0> output;
internal::Channel channel(100, &output);
Channel::OutputBuffer buffer = channel.AcquireBuffer();
EXPECT_TRUE(buffer.payload(kTestPacket).empty());
}
TEST(Channel, OutputBuffer_TooSmall) {
TestOutput<kReservedSize - 1> output;
internal::Channel channel(100, &output);
Channel::OutputBuffer output_buffer = channel.AcquireBuffer();
EXPECT_TRUE(output_buffer.payload(kTestPacket).empty());
EXPECT_EQ(Status::Internal(), channel.Send(output_buffer, kTestPacket));
}
TEST(Channel, OutputBuffer_ExactFit) {
TestOutput<kReservedSize> output;
internal::Channel channel(100, &output);
Channel::OutputBuffer output_buffer(channel.AcquireBuffer());
const std::span payload = output_buffer.payload(kTestPacket);
EXPECT_EQ(payload.size(), output.buffer().size() - kReservedSize);
EXPECT_EQ(output.buffer().data() + kReservedSize, payload.data());
EXPECT_EQ(Status::Ok(), channel.Send(output_buffer, kTestPacket));
}
TEST(Channel, OutputBuffer_PayloadDoesNotFit_ReportsError) {
TestOutput<kReservedSize> output;
internal::Channel channel(100, &output);
Packet packet = kTestPacket;
byte data[1] = {};
packet.set_payload(data);
EXPECT_EQ(Status::Internal(), channel.Send(packet));
}
TEST(Channel, OutputBuffer_ExtraRoom) {
TestOutput<kReservedSize * 3> output;
internal::Channel channel(100, &output);
Channel::OutputBuffer output_buffer = channel.AcquireBuffer();
const std::span payload = output_buffer.payload(kTestPacket);
EXPECT_EQ(payload.size(), output.buffer().size() - kReservedSize);
EXPECT_EQ(output.buffer().data() + kReservedSize, payload.data());
EXPECT_EQ(Status::Ok(), channel.Send(output_buffer, kTestPacket));
}
TEST(Channel, OutputBuffer_ReturnsStatusFromChannelOutputSend) {
TestOutput<kReservedSize * 3> output;
internal::Channel channel(100, &output);
Channel::OutputBuffer output_buffer = channel.AcquireBuffer();
output.set_send_status(Status::Aborted());
EXPECT_EQ(Status::Aborted(), channel.Send(output_buffer, kTestPacket));
}
} // namespace
} // namespace pw::rpc::internal
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