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//
// Copyright 2022 gRPC 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
//
// 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 <gmock/gmock.h>
#include <gtest/gtest.h>
#include "absl/strings/str_cat.h"
#include "absl/types/optional.h"
#include <grpc/grpc.h>
#include <grpcpp/channel.h>
#include <grpcpp/client_context.h>
#include <grpcpp/create_channel.h>
#include <grpcpp/ext/orca_service.h>
#include <grpcpp/server.h>
#include <grpcpp/server_builder.h>
#include <grpcpp/server_context.h>
#include "src/core/lib/gprpp/time.h"
#include "src/proto/grpc/testing/xds/v3/orca_service.grpc.pb.h"
#include "src/proto/grpc/testing/xds/v3/orca_service.pb.h"
#include "test/core/util/port.h"
#include "test/core/util/test_config.h"
using xds::data::orca::v3::OrcaLoadReport;
using xds::service::orca::v3::OpenRcaService;
using xds::service::orca::v3::OrcaLoadReportRequest;
namespace grpc {
namespace testing {
namespace {
using experimental::OrcaService;
class OrcaServiceEnd2endTest : public ::testing::Test {
protected:
// A wrapper for the client stream that ensures that responses come
// back at the requested interval.
class Stream {
public:
Stream(OpenRcaService::Stub* stub, grpc_core::Duration requested_interval)
: requested_interval_(requested_interval) {
OrcaLoadReportRequest request;
gpr_timespec timespec = requested_interval.as_timespec();
auto* interval_proto = request.mutable_report_interval();
interval_proto->set_seconds(timespec.tv_sec);
interval_proto->set_nanos(timespec.tv_nsec);
stream_ = stub->StreamCoreMetrics(&context_, request);
}
~Stream() { context_.TryCancel(); }
OrcaLoadReport ReadResponse() {
OrcaLoadReport response;
EXPECT_TRUE(stream_->Read(&response));
auto now = grpc_core::Timestamp::FromTimespecRoundDown(
gpr_now(GPR_CLOCK_MONOTONIC));
if (last_response_time_.has_value()) {
// Allow a small fudge factor to avoid test flakiness.
const grpc_core::Duration fudge_factor =
grpc_core::Duration::Milliseconds(750) *
grpc_test_slowdown_factor();
auto elapsed = now - *last_response_time_;
EXPECT_GE(elapsed, requested_interval_ - fudge_factor)
<< elapsed.ToString();
EXPECT_LE(elapsed, requested_interval_ + fudge_factor)
<< elapsed.ToString();
}
last_response_time_ = now;
return response;
}
private:
const grpc_core::Duration requested_interval_;
ClientContext context_;
std::unique_ptr<grpc::ClientReaderInterface<OrcaLoadReport>> stream_;
absl::optional<grpc_core::Timestamp> last_response_time_;
};
OrcaServiceEnd2endTest()
: orca_service_(OrcaService::Options().set_min_report_duration(
absl::ZeroDuration())) {
std::string server_address =
absl::StrCat("localhost:", grpc_pick_unused_port_or_die());
ServerBuilder builder;
builder.AddListeningPort(server_address, grpc::InsecureServerCredentials());
builder.RegisterService(&orca_service_);
server_ = builder.BuildAndStart();
gpr_log(GPR_INFO, "server started on %s", server_address_.c_str());
auto channel = CreateChannel(server_address, InsecureChannelCredentials());
stub_ = OpenRcaService::NewStub(channel);
}
~OrcaServiceEnd2endTest() override { server_->Shutdown(); }
std::string server_address_;
OrcaService orca_service_;
std::unique_ptr<Server> server_;
std::unique_ptr<OpenRcaService::Stub> stub_;
};
TEST_F(OrcaServiceEnd2endTest, Basic) {
constexpr char kMetricName1[] = "foo";
constexpr char kMetricName2[] = "bar";
constexpr char kMetricName3[] = "baz";
constexpr char kMetricName4[] = "quux";
// Start stream1 with 5s interval and stream2 with 2.5s interval.
// Throughout the test, we should get two responses on stream2 for
// every one response on stream1.
Stream stream1(stub_.get(), grpc_core::Duration::Milliseconds(5000));
Stream stream2(stub_.get(), grpc_core::Duration::Milliseconds(2500));
auto ReadResponses = [&](std::function<void(const OrcaLoadReport&)> checker) {
gpr_log(GPR_INFO, "reading response from stream1");
OrcaLoadReport response = stream1.ReadResponse();
checker(response);
gpr_log(GPR_INFO, "reading response from stream2");
response = stream2.ReadResponse();
checker(response);
gpr_log(GPR_INFO, "reading response from stream2");
response = stream2.ReadResponse();
checker(response);
};
// Initial response should not have any values populated.
ReadResponses([](const OrcaLoadReport& response) {
EXPECT_EQ(response.cpu_utilization(), 0);
EXPECT_EQ(response.mem_utilization(), 0);
EXPECT_THAT(response.utilization(), ::testing::UnorderedElementsAre());
});
// Now set CPU utilization on the server.
orca_service_.SetCpuUtilization(0.5);
ReadResponses([](const OrcaLoadReport& response) {
EXPECT_EQ(response.cpu_utilization(), 0.5);
EXPECT_EQ(response.mem_utilization(), 0);
EXPECT_THAT(response.utilization(), ::testing::UnorderedElementsAre());
});
// Update CPU utilization and set memory utilization.
orca_service_.SetCpuUtilization(0.8);
orca_service_.SetMemoryUtilization(0.4);
ReadResponses([](const OrcaLoadReport& response) {
EXPECT_EQ(response.cpu_utilization(), 0.8);
EXPECT_EQ(response.mem_utilization(), 0.4);
EXPECT_THAT(response.utilization(), ::testing::UnorderedElementsAre());
});
// Unset CPU and memory utilization and set a named utilization.
orca_service_.DeleteCpuUtilization();
orca_service_.DeleteMemoryUtilization();
orca_service_.SetNamedUtilization(kMetricName1, 0.3);
ReadResponses([&](const OrcaLoadReport& response) {
EXPECT_EQ(response.cpu_utilization(), 0);
EXPECT_EQ(response.mem_utilization(), 0);
EXPECT_THAT(
response.utilization(),
::testing::UnorderedElementsAre(::testing::Pair(kMetricName1, 0.3)));
});
// Unset the previous named utilization and set two new ones.
orca_service_.DeleteNamedUtilization(kMetricName1);
orca_service_.SetNamedUtilization(kMetricName2, 0.2);
orca_service_.SetNamedUtilization(kMetricName3, 0.1);
ReadResponses([&](const OrcaLoadReport& response) {
EXPECT_EQ(response.cpu_utilization(), 0);
EXPECT_EQ(response.mem_utilization(), 0);
EXPECT_THAT(
response.utilization(),
::testing::UnorderedElementsAre(::testing::Pair(kMetricName2, 0.2),
::testing::Pair(kMetricName3, 0.1)));
});
// Replace the entire named metric map at once.
orca_service_.SetAllNamedUtilization(
{{kMetricName2, 0.5}, {kMetricName4, 0.9}});
ReadResponses([&](const OrcaLoadReport& response) {
EXPECT_EQ(response.cpu_utilization(), 0);
EXPECT_EQ(response.mem_utilization(), 0);
EXPECT_THAT(
response.utilization(),
::testing::UnorderedElementsAre(::testing::Pair(kMetricName2, 0.5),
::testing::Pair(kMetricName4, 0.9)));
});
}
} // namespace
} // namespace testing
} // namespace grpc
int main(int argc, char** argv) {
grpc::testing::TestEnvironment env(&argc, argv);
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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