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// Copyright 2023 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_transport/stream_rpc_dispatcher.h"
#include <algorithm>
#include <atomic>
#include "gtest/gtest.h"
#include "pw_bytes/span.h"
#include "pw_log/log.h"
#include "pw_span/span.h"
#include "pw_status/status.h"
#include "pw_stream/stream.h"
#include "pw_sync/mutex.h"
#include "pw_sync/thread_notification.h"
#include "pw_thread/thread.h"
#include "pw_thread_stl/options.h"
namespace pw::rpc {
namespace {
using namespace std::chrono_literals;
class TestIngress : public RpcIngressHandler {
public:
explicit TestIngress(size_t num_bytes_expected)
: num_bytes_expected_(num_bytes_expected) {}
Status ProcessIncomingData(ConstByteSpan buffer) override {
if (num_bytes_expected_ > 0) {
std::copy(buffer.begin(), buffer.end(), std::back_inserter(received_));
num_bytes_expected_ -= std::min(num_bytes_expected_, buffer.size());
}
if (num_bytes_expected_ == 0) {
done_.release();
}
return OkStatus();
}
std::vector<std::byte> received() const { return received_; }
void Wait() { done_.acquire(); }
private:
size_t num_bytes_expected_ = 0;
sync::ThreadNotification done_;
std::vector<std::byte> received_;
};
class TestStream : public stream::NonSeekableReader {
public:
TestStream() : position_(0) {}
void QueueData(ConstByteSpan data) {
std::lock_guard lock(send_mutex_);
std::copy(data.begin(), data.end(), std::back_inserter(to_send_));
available_.release();
}
void Stop() {
stopped_ = true;
available_.release();
}
private:
void WaitForData() {
while (!stopped_) {
{
std::lock_guard lock(send_mutex_);
if (position_ < to_send_.size()) {
break;
}
}
available_.acquire();
}
}
StatusWithSize DoRead(ByteSpan out) final {
WaitForData();
if (stopped_) {
return StatusWithSize(0);
}
std::lock_guard lock(send_mutex_);
if (position_ == to_send_.size()) {
return StatusWithSize::OutOfRange();
}
size_t to_copy = std::min(out.size(), to_send_.size() - position_);
std::memcpy(out.data(), to_send_.data() + position_, to_copy);
position_ += to_copy;
return StatusWithSize(to_copy);
}
sync::Mutex send_mutex_;
std::vector<std::byte> to_send_;
std::atomic<bool> stopped_ = false;
size_t position_;
sync::ThreadNotification available_;
};
TEST(StreamRpcDispatcherTest, RecvOk) {
constexpr size_t kWriteSize = 10;
constexpr std::array<std::byte, kWriteSize> kWriteBuffer = {};
TestIngress test_ingress(kWriteSize);
TestStream test_stream;
auto dispatcher = StreamRpcDispatcher<kWriteSize>(test_stream, test_ingress);
auto dispatcher_thread = thread::Thread(thread::stl::Options(), dispatcher);
test_stream.QueueData(kWriteBuffer);
test_ingress.Wait();
dispatcher.Stop();
test_stream.Stop();
dispatcher_thread.join();
auto received = test_ingress.received();
EXPECT_EQ(received.size(), kWriteSize);
EXPECT_EQ(dispatcher.num_read_errors(), 0U);
}
} // namespace
} // namespace pw::rpc
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