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// Copyright (c) Facebook, Inc. and its affiliates.
//
// 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
//
// http://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 <folly/io/async/ScopedEventBaseThread.h>
#include <gtest/gtest.h>
#include <thread>
#include "RSocketTests.h"
#include "rsocket/test/test_utils/GenericRequestResponseHandler.h"
#include "yarpl/Flowable.h"
#include "yarpl/flowable/TestSubscriber.h"
using namespace yarpl;
using namespace yarpl::flowable;
using namespace rsocket;
using namespace rsocket::tests;
using namespace rsocket::tests::client_server;
/**
* Test a finite stream both directions.
*/
class TestHandlerHello : public rsocket::RSocketResponder {
public:
/// Handles a new inbound Stream requested by the other end.
std::shared_ptr<yarpl::flowable::Flowable<rsocket::Payload>>
handleRequestChannel(
rsocket::Payload initialPayload,
std::shared_ptr<yarpl::flowable::Flowable<rsocket::Payload>> stream,
rsocket::StreamId /*streamId*/) override {
// say "Hello" to each name on the input stream
return stream->map([initialPayload = std::move(initialPayload)](Payload p) {
std::stringstream ss;
ss << "[" << initialPayload.cloneDataToString() << "] "
<< "Hello " << p.moveDataToString() << "!";
std::string s = ss.str();
return Payload(s);
});
}
};
TEST(RequestChannelTest, Hello) {
folly::ScopedEventBaseThread worker;
auto server = makeServer(std::make_shared<TestHandlerHello>());
auto client = makeClient(worker.getEventBase(), *server->listeningPort());
auto requester = client->getRequester();
auto ts = TestSubscriber<std::string>::create();
requester
->requestChannel(
Payload("/hello"),
Flowable<>::justN({"Bob", "Jane"})->map([](std::string v) {
return Payload(v);
}))
->map([](auto p) { return p.moveDataToString(); })
->subscribe(ts);
ts->awaitTerminalEvent();
ts->assertSuccess();
ts->assertValueCount(2);
// assert that we echo back the 2nd and 3rd request values
// with the 1st initial payload prepended to each
ts->assertValueAt(0, "[/hello] Hello Bob!");
ts->assertValueAt(1, "[/hello] Hello Jane!");
}
TEST(RequestChannelTest, HelloNoFlowControl) {
folly::ScopedEventBaseThread worker;
auto server = makeServer(std::make_shared<TestHandlerHello>());
auto stats = std::make_shared<RSocketStatsFlowControl>();
auto client = makeClient(
worker.getEventBase(), *server->listeningPort(), nullptr, stats);
auto requester = client->getRequester();
auto ts = TestSubscriber<std::string>::create(1000);
requester
->requestChannel(
Payload("/hello"),
Flowable<>::justN({"Bob", "Jane"})->map([](std::string v) {
return Payload(v);
}))
->map([](auto p) { return p.moveDataToString(); })
->subscribe(ts);
ts->awaitTerminalEvent();
ts->assertSuccess();
ts->assertValueCount(2);
// assert that we echo back the 2nd and 3rd request values
// with the 1st initial payload prepended to each
ts->assertValueAt(0, "[/hello] Hello Bob!");
ts->assertValueAt(1, "[/hello] Hello Jane!");
// Make sure that the initial requestN in the Stream Request Frame
// is already enough and no other requestN messages are sent.
EXPECT_EQ(stats->writeRequestN_, 0);
}
TEST(RequestChannelTest, RequestOnDisconnectedClient) {
folly::ScopedEventBaseThread worker;
auto client = makeDisconnectedClient(worker.getEventBase());
auto requester = client->getRequester();
bool did_call_on_error = false;
folly::Baton<> wait_for_on_error;
auto instream = Flowable<Payload>::empty();
requester->requestChannel(instream)->subscribe(
[](auto /* payload */) {
// onNext shouldn't be called
FAIL();
},
[&](folly::exception_wrapper) {
did_call_on_error = true;
wait_for_on_error.post();
},
[]() {
// onComplete shouldn't be called
FAIL();
});
wait_for_on_error.timed_wait(std::chrono::milliseconds(100));
ASSERT_TRUE(did_call_on_error);
}
class TestChannelResponder : public rsocket::RSocketResponder {
public:
TestChannelResponder(
int64_t rangeEnd = 10,
int64_t initialSubReq = credits::kNoFlowControl)
: rangeEnd_{rangeEnd},
testSubscriber_{TestSubscriber<std::string>::create(initialSubReq)} {}
std::shared_ptr<Flowable<rsocket::Payload>> handleRequestChannel(
rsocket::Payload initialPayload,
std::shared_ptr<Flowable<rsocket::Payload>> requestStream,
rsocket::StreamId) override {
// add initial payload to testSubscriber values list
testSubscriber_->manuallyPush(initialPayload.moveDataToString());
requestStream->map([](auto p) { return p.moveDataToString(); })
->subscribe(testSubscriber_);
return Flowable<>::range(1, rangeEnd_)->map([&](int64_t v) {
std::stringstream ss;
ss << "Responder stream: " << v << " of " << rangeEnd_;
std::string s = ss.str();
return Payload(s, "metadata");
});
}
std::shared_ptr<TestSubscriber<std::string>> getChannelSubscriber() {
return testSubscriber_;
}
private:
int64_t rangeEnd_;
std::shared_ptr<TestSubscriber<std::string>> testSubscriber_;
};
TEST(RequestChannelTest, CompleteRequesterResponderContinues) {
int64_t responderRange = 100;
int64_t responderSubscriberInitialRequest = credits::kNoFlowControl;
auto responder = std::make_shared<TestChannelResponder>(
responderRange, responderSubscriberInitialRequest);
folly::ScopedEventBaseThread worker;
auto server = makeServer(responder);
auto client = makeClient(worker.getEventBase(), *server->listeningPort());
auto requester = client->getRequester();
auto requestSubscriber = TestSubscriber<std::string>::create(50);
auto responderSubscriber = responder->getChannelSubscriber();
int64_t requesterRangeEnd = 10;
auto requesterFlowable =
Flowable<>::range(1, requesterRangeEnd)->map([=](int64_t v) {
std::stringstream ss;
ss << "Requester stream: " << v << " of " << requesterRangeEnd;
std::string s = ss.str();
return Payload(s, "metadata");
});
requester->requestChannel(Payload("Initial Request"), requesterFlowable)
->map([](auto p) { return p.moveDataToString(); })
->subscribe(requestSubscriber);
// finish streaming from Requester
responderSubscriber->awaitTerminalEvent();
responderSubscriber->assertSuccess();
responderSubscriber->assertValueCount(11);
responderSubscriber->assertValueAt(0, "Initial Request");
responderSubscriber->assertValueAt(1, "Requester stream: 1 of 10");
responderSubscriber->assertValueAt(10, "Requester stream: 10 of 10");
// Requester stream is closed, Responder continues
requestSubscriber->request(50);
requestSubscriber->awaitTerminalEvent();
requestSubscriber->assertSuccess();
requestSubscriber->assertValueCount(100);
requestSubscriber->assertValueAt(0, "Responder stream: 1 of 100");
requestSubscriber->assertValueAt(99, "Responder stream: 100 of 100");
}
TEST(RequestChannelTest, CompleteResponderRequesterContinues) {
int64_t responderRange = 10;
int64_t responderSubscriberInitialRequest = 50;
auto responder = std::make_shared<TestChannelResponder>(
responderRange, responderSubscriberInitialRequest);
folly::ScopedEventBaseThread worker;
auto server = makeServer(responder);
auto client = makeClient(worker.getEventBase(), *server->listeningPort());
auto requester = client->getRequester();
auto requestSubscriber = TestSubscriber<std::string>::create();
auto responderSubscriber = responder->getChannelSubscriber();
int64_t requesterRangeEnd = 100;
auto requesterFlowable =
Flowable<>::range(1, requesterRangeEnd)->map([=](int64_t v) {
std::stringstream ss;
ss << "Requester stream: " << v << " of " << requesterRangeEnd;
std::string s = ss.str();
return Payload(s, "metadata");
});
requester->requestChannel(requesterFlowable)
->map([](auto p) { return p.moveDataToString(); })
->subscribe(requestSubscriber);
// finish streaming from Responder
requestSubscriber->awaitTerminalEvent();
requestSubscriber->assertSuccess();
requestSubscriber->assertValueCount(10);
requestSubscriber->assertValueAt(0, "Responder stream: 1 of 10");
requestSubscriber->assertValueAt(9, "Responder stream: 10 of 10");
// Responder stream is closed, Requester continues
responderSubscriber->request(50);
responderSubscriber->awaitTerminalEvent();
responderSubscriber->assertSuccess();
responderSubscriber->assertValueCount(100);
responderSubscriber->assertValueAt(0, "Requester stream: 1 of 100");
responderSubscriber->assertValueAt(99, "Requester stream: 100 of 100");
}
TEST(RequestChannelTest, FlowControl) {
constexpr int64_t responderRange = 10;
constexpr int64_t responderSubscriberInitialRequest = 0;
auto responder = std::make_shared<TestChannelResponder>(
responderRange, responderSubscriberInitialRequest);
folly::ScopedEventBaseThread worker;
auto server = makeServer(responder);
auto client = makeClient(worker.getEventBase(), *server->listeningPort());
auto requester = client->getRequester();
auto requestSubscriber = TestSubscriber<std::string>::create(0);
auto responderSubscriber = responder->getChannelSubscriber();
constexpr int64_t requesterRangeEnd = 10;
auto requesterFlowable =
Flowable<>::range(1, requesterRangeEnd)->map([&](int64_t v) {
std::stringstream ss;
ss << "Requester stream: " << v << " of " << requesterRangeEnd;
std::string s = ss.str();
return Payload(s, "metadata");
});
requester->requestChannel(Payload("Initial Request"), requesterFlowable)
->map([](auto p) { return p.moveDataToString(); })
->subscribe(requestSubscriber);
// Wait till the Channel is created
responderSubscriber->awaitValueCount(1);
for (int i = 1; i <= 10; i++) {
requestSubscriber->request(1);
requestSubscriber->awaitValueCount(i);
requestSubscriber->assertValueCount(i);
}
for (int i = 1; i <= 10; i++) {
responderSubscriber->request(1);
// the channel initial payload was pushed to responderSubscriber so we
// need to add this one item to expected
responderSubscriber->awaitValueCount(i + 1);
responderSubscriber->assertValueCount(i + 1);
}
requestSubscriber->awaitTerminalEvent();
responderSubscriber->awaitTerminalEvent();
requestSubscriber->assertSuccess();
responderSubscriber->assertSuccess();
requestSubscriber->assertValueAt(0, "Responder stream: 1 of 10");
requestSubscriber->assertValueAt(9, "Responder stream: 10 of 10");
responderSubscriber->assertValueAt(0, "Initial Request");
responderSubscriber->assertValueAt(1, "Requester stream: 1 of 10");
responderSubscriber->assertValueAt(10, "Requester stream: 10 of 10");
}
class TestChannelResponderFailure : public rsocket::RSocketResponder {
public:
TestChannelResponderFailure()
: testSubscriber_{TestSubscriber<std::string>::create()} {}
std::shared_ptr<Flowable<rsocket::Payload>> handleRequestChannel(
rsocket::Payload initialPayload,
std::shared_ptr<Flowable<rsocket::Payload>> requestStream,
rsocket::StreamId) override {
// add initial payload to testSubscriber values list
testSubscriber_->manuallyPush(initialPayload.moveDataToString());
requestStream->map([](auto p) { return p.moveDataToString(); })
->subscribe(testSubscriber_);
return Flowable<Payload>::error(
std::runtime_error("A wild Error appeared!"));
}
std::shared_ptr<TestSubscriber<std::string>> getChannelSubscriber() {
return testSubscriber_;
}
private:
std::shared_ptr<TestSubscriber<std::string>> testSubscriber_;
};
TEST(RequestChannelTest, FailureOnResponderRequesterSees) {
auto responder = std::make_shared<TestChannelResponderFailure>();
folly::ScopedEventBaseThread worker;
auto server = makeServer(responder);
auto client = makeClient(worker.getEventBase(), *server->listeningPort());
auto requester = client->getRequester();
auto requestSubscriber = TestSubscriber<std::string>::create();
auto responderSubscriber = responder->getChannelSubscriber();
int64_t requesterRangeEnd = 10;
auto requesterFlowable =
Flowable<>::range(1, requesterRangeEnd)->map([&](int64_t v) {
std::stringstream ss;
ss << "Requester stream: " << v << " of " << requesterRangeEnd;
std::string s = ss.str();
return Payload(s, "metadata");
});
requester->requestChannel(Payload("Initial Request"), requesterFlowable)
->map([](auto p) { return p.moveDataToString(); })
->subscribe(requestSubscriber);
// failure streaming from Responder
requestSubscriber->awaitTerminalEvent();
requestSubscriber->assertOnErrorMessage("ErrorWithPayload");
EXPECT_TRUE(requestSubscriber->getException().with_exception(
[](ErrorWithPayload& err) {
EXPECT_STREQ(
"A wild Error appeared!", err.payload.moveDataToString().c_str());
}));
responderSubscriber->awaitTerminalEvent();
responderSubscriber->assertSuccess();
responderSubscriber->assertValueCount(1);
responderSubscriber->assertValueAt(0, "Initial Request");
}
struct LargePayloadChannelHandler : public rsocket::RSocketResponder {
LargePayloadChannelHandler(std::string const& data, std::string const& meta)
: data(data), meta(meta) {}
std::shared_ptr<yarpl::flowable::Flowable<Payload>> handleRequestChannel(
Payload initialPayload,
std::shared_ptr<yarpl::flowable::Flowable<Payload>> stream,
StreamId) override {
RSocketPayloadUtils::checkSameStrings(
initialPayload.data, data, "data received in initial payload");
RSocketPayloadUtils::checkSameStrings(
initialPayload.metadata, meta, "metadata received in initial payload");
return stream->map([&](Payload payload) {
RSocketPayloadUtils::checkSameStrings(
payload.data, data, "data received in server stream");
RSocketPayloadUtils::checkSameStrings(
payload.metadata, meta, "metadata received in server stream");
return payload;
});
}
std::string const& data;
std::string const& meta;
};
TEST(RequestChannelTest, TestLargePayload) {
LOG(INFO) << "Building up large data/metadata, this may take a moment...";
std::string const niceLongData = RSocketPayloadUtils::makeLongString(
RSocketPayloadUtils::LargeRequestSize, "ABCDEFGH");
std::string const niceLongMeta = RSocketPayloadUtils::makeLongString(
RSocketPayloadUtils::LargeRequestSize, "12345678");
LOG(INFO) << "Built meta size: " << niceLongMeta.size()
<< " data size: " << niceLongData.size();
folly::ScopedEventBaseThread worker;
auto handler =
std::make_shared<LargePayloadChannelHandler>(niceLongData, niceLongMeta);
auto server = makeServer(handler);
auto client = makeClient(worker.getEventBase(), *server->listeningPort());
auto requester = client->getRequester();
auto checkForSizePattern = [&](std::vector<size_t> const& meta_sizes,
std::vector<size_t> const& data_sizes) {
auto to = TestSubscriber<int>::create();
auto seedPayload = Payload(
RSocketPayloadUtils::buildIOBufFromString(data_sizes, niceLongData),
RSocketPayloadUtils::buildIOBufFromString(meta_sizes, niceLongMeta));
auto makePayload = [&] {
return Payload(seedPayload.data->clone(), seedPayload.metadata->clone());
};
auto requests = yarpl::flowable::Flowable<Payload>::create(
[&](auto& subscriber, int64_t num) {
while (num--) {
subscriber.onNext(makePayload());
}
})
->take(3);
requester->requestChannel(std::move(requests))
->map([&](Payload p) {
RSocketPayloadUtils::checkSameStrings(
p.data, niceLongData, "data received on client");
RSocketPayloadUtils::checkSameStrings(
p.metadata, niceLongMeta, "metadata received on client");
return 0;
})
->subscribe(to);
to->awaitTerminalEvent(std::chrono::seconds{20});
to->assertValueCount(2);
to->assertSuccess();
};
// All in one big chunk
checkForSizePattern({}, {});
// Small chunk, big chunk, small chunk
checkForSizePattern({100, 5 * 1024 * 1024, 100}, {100, 5 * 1024 * 1024, 100});
}
TEST(RequestChannelTest, MultiSubscribe) {
folly::ScopedEventBaseThread worker;
auto server = makeServer(std::make_shared<TestHandlerHello>());
auto client = makeClient(worker.getEventBase(), *server->listeningPort());
auto requester = client->getRequester();
auto ts = TestSubscriber<std::string>::create();
auto stream =
requester
->requestChannel(
Payload("/hello"),
Flowable<>::justN({"Bob", "Jane"})->map([](std::string v) {
return Payload(v);
}))
->map([](auto p) { return p.moveDataToString(); });
// First subscribe
stream->subscribe(ts);
ts->awaitTerminalEvent();
ts->assertSuccess();
ts->assertValueCount(2);
// assert that we echo back the 2nd and 3rd request values
// with the 1st initial payload prepended to each
ts->assertValueAt(0, "[/hello] Hello Bob!");
ts->assertValueAt(1, "[/hello] Hello Jane!");
// Second subscribe
ts = TestSubscriber<std::string>::create();
stream->subscribe(ts);
ts->awaitTerminalEvent();
ts->assertSuccess();
ts->assertValueCount(2);
// assert that we echo back the 2nd and 3rd request values
// with the 1st initial payload prepended to each
ts->assertValueAt(0, "[/hello] Hello Bob!");
ts->assertValueAt(1, "[/hello] Hello Jane!");
}