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// Copyright (c) 2018 Google LLC.
//
// 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 <unistd.h>
#include <sstream>
#include "gtest/gtest.h"
#include "source/util/timer.h"
namespace spvtools {
namespace utils {
namespace {
// A mock class to mimic Timer class for a testing purpose. It has fixed
// CPU/WALL/USR/SYS time, RSS delta, and the delta of the number of page faults.
class MockTimer : public Timer {
public:
MockTimer(std::ostream* out, bool measure_mem_usage = false)
: Timer(out, measure_mem_usage) {}
double CPUTime() override { return 0.019123; }
double WallTime() override { return 0.019723; }
double UserTime() override { return 0.012723; }
double SystemTime() override { return 0.002723; }
long RSS() const override { return 360L; }
long PageFault() const override { return 3600L; }
};
// This unit test checks whether the actual output of MockTimer::Report() is the
// same as fixed CPU/WALL/USR/SYS time, RSS delta, and the delta of the number
// of page faults that are returned by MockTimer.
TEST(MockTimer, DoNothing) {
std::ostringstream buf;
PrintTimerDescription(&buf);
MockTimer timer(&buf);
timer.Start();
// Do nothing.
timer.Stop();
timer.Report("TimerTest");
EXPECT_EQ(0.019123, timer.CPUTime());
EXPECT_EQ(0.019723, timer.WallTime());
EXPECT_EQ(0.012723, timer.UserTime());
EXPECT_EQ(0.002723, timer.SystemTime());
EXPECT_EQ(
" PASS name CPU time WALL time USR time"
" SYS time\n TimerTest 0.02 0.02"
" 0.01 0.00\n",
buf.str());
}
// This unit test checks whether the ScopedTimer<MockTimer> correctly reports
// the fixed CPU/WALL/USR/SYS time, RSS delta, and the delta of the number of
// page faults that are returned by MockTimer.
TEST(MockTimer, TestScopedTimer) {
std::ostringstream buf;
{
ScopedTimer<MockTimer> scopedtimer(&buf, "ScopedTimerTest");
// Do nothing.
}
EXPECT_EQ(
" ScopedTimerTest 0.02 0.02 0.01"
" 0.00\n",
buf.str());
}
// A mock class to mimic CumulativeTimer class for a testing purpose. It has
// fixed CPU/WALL/USR/SYS time, RSS delta, and the delta of the number of page
// faults for each measurement (i.e., a pair of Start() and Stop()). If the
// number of measurements increases, it increases |count_stop_| by the number of
// calling Stop() and the amount of each resource usage is proportional to
// |count_stop_|.
class MockCumulativeTimer : public CumulativeTimer {
public:
MockCumulativeTimer(std::ostream* out, bool measure_mem_usage = false)
: CumulativeTimer(out, measure_mem_usage), count_stop_(0) {}
double CPUTime() override { return count_stop_ * 0.019123; }
double WallTime() override { return count_stop_ * 0.019723; }
double UserTime() override { return count_stop_ * 0.012723; }
double SystemTime() override { return count_stop_ * 0.002723; }
long RSS() const override { return count_stop_ * 360L; }
long PageFault() const override { return count_stop_ * 3600L; }
// Calling Stop() does nothing but just increases |count_stop_| by 1.
void Stop() override { ++count_stop_; };
private:
unsigned int count_stop_;
};
// This unit test checks whether the MockCumulativeTimer correctly reports the
// cumulative CPU/WALL/USR/SYS time, RSS delta, and the delta of the number of
// page faults whose values are fixed for each measurement (i.e., a pair of
// Start() and Stop()).
TEST(MockCumulativeTimer, DoNothing) {
CumulativeTimer* ctimer;
std::ostringstream buf;
{
ctimer = new MockCumulativeTimer(&buf);
ctimer->Start();
// Do nothing.
ctimer->Stop();
}
{
ctimer->Start();
// Do nothing.
ctimer->Stop();
ctimer->Report("CumulativeTimerTest");
}
EXPECT_EQ(
" CumulativeTimerTest 0.04 0.04 0.03"
" 0.01\n",
buf.str());
if (ctimer) delete ctimer;
}
} // namespace
} // namespace utils
} // namespace spvtools