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/*
*
* Copyright 2016 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 "src/core/lib/transport/bdp_estimator.h"
#include <grpc/grpc.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#include <gtest/gtest.h>
#include <limits.h>
#include "src/core/lib/gpr/string.h"
#include "src/core/lib/gpr/useful.h"
#include "src/core/lib/iomgr/timer_manager.h"
#include "test/core/util/test_config.h"
extern gpr_timespec (*gpr_now_impl)(gpr_clock_type clock_type);
namespace grpc_core {
namespace testing {
namespace {
int g_clock = 0;
gpr_timespec fake_gpr_now(gpr_clock_type clock_type) {
gpr_timespec ts;
ts.tv_sec = g_clock;
ts.tv_nsec = 0;
ts.clock_type = clock_type;
return ts;
}
void inc_time(void) { g_clock += 30; }
} // namespace
TEST(BdpEstimatorTest, NoOp) { BdpEstimator est("test"); }
TEST(BdpEstimatorTest, EstimateBdpNoSamples) {
BdpEstimator est("test");
est.EstimateBdp();
}
namespace {
void AddSamples(BdpEstimator* estimator, int64_t* samples, size_t n) {
estimator->AddIncomingBytes(1234567);
inc_time();
grpc_core::ExecCtx exec_ctx;
estimator->SchedulePing();
estimator->StartPing();
for (size_t i = 0; i < n; i++) {
estimator->AddIncomingBytes(samples[i]);
}
gpr_sleep_until(gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
gpr_time_from_millis(1, GPR_TIMESPAN)));
grpc_core::ExecCtx::Get()->InvalidateNow();
estimator->CompletePing();
}
void AddSample(BdpEstimator* estimator, int64_t sample) {
AddSamples(estimator, &sample, 1);
}
} // namespace
TEST(BdpEstimatorTest, GetEstimate1Sample) {
BdpEstimator est("test");
AddSample(&est, 100);
est.EstimateBdp();
}
TEST(BdpEstimatorTest, GetEstimate2Samples) {
BdpEstimator est("test");
AddSample(&est, 100);
AddSample(&est, 100);
est.EstimateBdp();
}
TEST(BdpEstimatorTest, GetEstimate3Samples) {
BdpEstimator est("test");
AddSample(&est, 100);
AddSample(&est, 100);
AddSample(&est, 100);
est.EstimateBdp();
}
namespace {
int64_t NextPow2(int64_t v) {
v--;
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
v |= v >> 16;
v |= v >> 32;
v++;
return v;
}
} // namespace
class BdpEstimatorRandomTest : public ::testing::TestWithParam<size_t> {};
TEST_P(BdpEstimatorRandomTest, GetEstimateRandomValues) {
BdpEstimator est("test");
const int kMaxSample = 65535;
int min = kMaxSample;
int max = 0;
for (size_t i = 0; i < GetParam(); i++) {
int sample = rand() % (kMaxSample + 1);
if (sample < min) min = sample;
if (sample > max) max = sample;
AddSample(&est, sample);
if (i >= 3) {
EXPECT_LE(est.EstimateBdp(), GPR_MAX(65536, 2 * NextPow2(max)))
<< " min:" << min << " max:" << max << " sample:" << sample;
}
}
}
INSTANTIATE_TEST_CASE_P(TooManyNames, BdpEstimatorRandomTest,
::testing::Values(3, 4, 6, 9, 13, 19, 28, 42, 63, 94,
141, 211, 316, 474, 711));
} // namespace testing
} // namespace grpc_core
int main(int argc, char** argv) {
grpc_test_init(argc, argv);
gpr_now_impl = grpc_core::testing::fake_gpr_now;
grpc_init();
grpc_timer_manager_set_threading(false);
::testing::InitGoogleTest(&argc, argv);
int ret = RUN_ALL_TESTS();
grpc_shutdown();
return ret;
}
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