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RequestResponseTest.cpp
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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 <folly/synchronization/Baton.h>
#include <gtest/gtest.h>
#include <thread>
#include "RSocketTests.h"
#include "rsocket/test/test_utils/GenericRequestResponseHandler.h"
#include "yarpl/Single.h"
#include "yarpl/single/SingleTestObserver.h"
using namespace yarpl::single;
using namespace rsocket;
using namespace rsocket::tests;
using namespace rsocket::tests::client_server;
namespace {
class TestHandlerCancel : public rsocket::RSocketResponder {
public:
TestHandlerCancel(
std::shared_ptr<folly::Baton<>> onCancel,
std::shared_ptr<folly::Baton<>> onSubscribe)
: onCancel_(std::move(onCancel)), onSubscribe_(std::move(onSubscribe)) {}
std::shared_ptr<Single<Payload>> handleRequestResponse(
Payload request,
StreamId) override {
// used to signal to the client when the subscribe is received
onSubscribe_->post();
// used to block this responder thread until a cancel is sent from client
// over network
auto cancelFromClient = std::make_shared<folly::Baton<>>();
// used to signal to the client once we receive a cancel
auto onCancel = onCancel_;
auto requestString = request.moveDataToString();
return Single<Payload>::create([name = std::move(requestString),
cancelFromClient,
onCancel](auto subscriber) mutable {
std::thread([subscriber = std::move(subscriber),
name = std::move(name),
cancelFromClient,
onCancel]() {
auto subscription = SingleSubscriptions::create(
[cancelFromClient] { cancelFromClient->post(); });
subscriber->onSubscribe(subscription);
// simulate slow processing or IO being done
// and block this current background thread
// until we are cancelled
cancelFromClient->timed_wait(std::chrono::seconds(1));
if (subscription->isCancelled()) {
// this is used by the unit test to assert the cancel was
// received
onCancel->post();
} else {
// if not cancelled would do work and emit here
}
})
.detach();
});
}
private:
std::shared_ptr<folly::Baton<>> onCancel_;
std::shared_ptr<folly::Baton<>> onSubscribe_;
};
} // namespace
TEST(RequestResponseTest, Cancel) {
folly::ScopedEventBaseThread worker;
auto onCancel = std::make_shared<folly::Baton<>>();
auto onSubscribe = std::make_shared<folly::Baton<>>();
auto server =
makeServer(std::make_shared<TestHandlerCancel>(onCancel, onSubscribe));
auto client = makeClient(worker.getEventBase(), *server->listeningPort());
auto requester = client->getRequester();
auto to = SingleTestObserver<std::string>::create();
requester->requestResponse(Payload("Jane"))
->map([](auto p) { return p.moveDataToString(); })
->subscribe(to);
// NOTE: wait for server to receive request/subscribe
// otherwise the cancellation will all happen locally
onSubscribe->wait();
// now cancel the local subscription
to->cancel();
// wait for cancel to propagate to server
onCancel->wait();
// assert no signals received on client
to->assertNoTerminalEvent();
}
// response creation usage
TEST(RequestResponseTest, CanCtorTypes) {
Response r1 = payload_response("foo", "bar");
Response r2 = error_response(std::runtime_error("whew!"));
}
TEST(RequestResponseTest, Hello) {
folly::ScopedEventBaseThread worker;
auto server = makeServer(std::make_shared<GenericRequestResponseHandler>(
[](StringPair const& request) {
return payload_response(
"Hello, " + request.first + " " + request.second + "!", ":)");
}));
auto client = makeClient(worker.getEventBase(), *server->listeningPort());
auto requester = client->getRequester();
auto to = SingleTestObserver<StringPair>::create();
requester->requestResponse(Payload("Jane", "Doe"))
->map(payload_to_stringpair)
->subscribe(to);
to->awaitTerminalEvent();
to->assertOnSuccessValue({"Hello, Jane Doe!", ":)"});
}
TEST(RequestResponseTest, FailureInResponse) {
folly::ScopedEventBaseThread worker;
auto server = makeServer(std::make_shared<GenericRequestResponseHandler>(
[](StringPair const& request) {
EXPECT_EQ(request.first, "foo");
EXPECT_EQ(request.second, "bar");
return error_response(std::runtime_error("whew!"));
}));
auto client = makeClient(worker.getEventBase(), *server->listeningPort());
auto requester = client->getRequester();
auto to = SingleTestObserver<StringPair>::create();
requester->requestResponse(Payload("foo", "bar"))
->map(payload_to_stringpair)
->subscribe(to);
to->awaitTerminalEvent();
to->assertOnErrorMessage("ErrorWithPayload");
EXPECT_TRUE(to->getException().with_exception([](ErrorWithPayload& err) {
EXPECT_STREQ("whew!", err.payload.moveDataToString().c_str());
}));
}
TEST(RequestResponseTest, 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;
requester->requestResponse(Payload("foo", "bar"))
->subscribe(
[](auto) {
// should not call onSuccess
FAIL();
},
[&](folly::exception_wrapper) {
did_call_on_error = true;
wait_for_on_error.post();
});
wait_for_on_error.timed_wait(std::chrono::milliseconds(100));
ASSERT_TRUE(did_call_on_error);
}
// TODO: test that multiple requests on a requestResponse
// fail in a well-defined way (right now it'd nullptr deref)
TEST(RequestResponseTest, MultipleRequestsError) {
folly::ScopedEventBaseThread worker;
auto server = makeServer(std::make_shared<GenericRequestResponseHandler>(
[](StringPair const& request) {
EXPECT_EQ(request.first, "foo");
EXPECT_EQ(request.second, "bar");
return payload_response("baz", "quix");
}));
auto client = makeClient(worker.getEventBase(), *server->listeningPort());
auto requester = client->getRequester();
auto flowable = requester->requestResponse(Payload("foo", "bar"));
}
TEST(RequestResponseTest, FailureOnRequest) {
folly::ScopedEventBaseThread worker;
auto server = makeServer(
std::make_shared<GenericRequestResponseHandler>([](auto const&) {
ADD_FAILURE();
return payload_response("", "");
}));
auto client = makeClient(worker.getEventBase(), *server->listeningPort());
auto requester = client->getRequester();
VLOG(0) << "Shutting down server so client request fails";
server->shutdownAndWait();
server.reset();
VLOG(0) << "Done";
auto to = SingleTestObserver<StringPair>::create();
requester->requestResponse(Payload("foo", "bar"))
->map(payload_to_stringpair)
->subscribe(to);
to->awaitTerminalEvent();
EXPECT_TRUE(to->getError());
}
struct LargePayloadReqRespHandler : public rsocket::RSocketResponder {
LargePayloadReqRespHandler(std::string const& data, std::string const& meta)
: data(data), meta(meta) {}
std::shared_ptr<yarpl::single::Single<Payload>> handleRequestResponse(
Payload payload,
StreamId) override {
RSocketPayloadUtils::checkSameStrings(
payload.data, data, "data received in payload");
RSocketPayloadUtils::checkSameStrings(
payload.metadata, meta, "metadata received in payload");
return yarpl::single::Single<Payload>::create(
[p = std::move(payload)](auto sub) mutable {
sub->onSubscribe(yarpl::single::SingleSubscriptions::empty());
sub->onSuccess(std::move(p));
});
}
std::string const& data;
std::string const& meta;
};
TEST(RequestResponseTest, TestLargePayload) {
VLOG(1) << "Building up large data/metadata, this may take a moment...";
std::string niceLongData = RSocketPayloadUtils::makeLongString(
RSocketPayloadUtils::LargeRequestSize, "ABCDEFGH");
std::string niceLongMeta = RSocketPayloadUtils::makeLongString(
RSocketPayloadUtils::LargeRequestSize, "12345678");
VLOG(1) << "Built meta size: " << niceLongMeta.size()
<< " data size: " << niceLongData.size();
auto checkForSizePattern = [&](std::vector<size_t> const& meta_sizes,
std::vector<size_t> const& data_sizes) {
folly::ScopedEventBaseThread worker;
auto server = makeServer(std::make_shared<LargePayloadReqRespHandler>(
niceLongData, niceLongMeta));
auto client = makeClient(worker.getEventBase(), *server->listeningPort());
auto requester = client->getRequester();
auto to = SingleTestObserver<int>::create();
requester
->requestResponse(Payload(
RSocketPayloadUtils::buildIOBufFromString(data_sizes, niceLongData),
RSocketPayloadUtils::buildIOBufFromString(
meta_sizes, niceLongMeta)))
->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();
to->assertSuccess();
};
// All in one big chunk
checkForSizePattern({}, {});
// Small chunk, big chunk, small chunk
checkForSizePattern(
{100, 10 * 1024 * 1024, 100}, {100, 10 * 1024 * 1024, 100});
}
TEST(RequestResponseTest, MultiSubscribe) {
folly::ScopedEventBaseThread worker;
auto server = makeServer(std::make_shared<GenericRequestResponseHandler>(
[](StringPair const& request) {
return payload_response(
"Hello, " + request.first + " " + request.second + "!", ":)");
}));
auto client = makeClient(worker.getEventBase(), *server->listeningPort());
auto requester = client->getRequester();
auto to = SingleTestObserver<StringPair>::create();
auto single = requester->requestResponse(Payload("Jane", "Doe"))
->map(payload_to_stringpair);
// Subscribe once
single->subscribe(to);
to->awaitTerminalEvent();
to->assertOnSuccessValue({"Hello, Jane Doe!", ":)"});
// Subscribe twice
to = SingleTestObserver<StringPair>::create();
single->subscribe(to);
to->awaitTerminalEvent();
to->assertOnSuccessValue({"Hello, Jane Doe!", ":)"});
}