Kaleidoscope/tests/simulator/timing/test/testcase.cpp

108 lines
3.1 KiB

/* -*- mode: c++ -*-
* Copyright (C) 2020 Keyboard.io, Inc.
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "testing/setup-googletest.h"
SETUP_GOOGLETEST();
namespace kaleidoscope {
namespace testing {
namespace {
constexpr uint32_t t_0{0};
constexpr uint32_t t_1{1};
constexpr uint32_t t_100{100};
constexpr uint32_t t_500{500};
constexpr uint32_t t_100_000{100000};
using ::testing::IsEmpty;
class SimulatorTiming : public VirtualDeviceTest {
public:
void assertTimeElapses(uint32_t interval) {
// Record time at start
uint32_t start = Kaleidoscope.millisAtCycleStart();
// Run cycles until the given amount of time has elapsed
sim_.RunForMillis(interval);
// Record time at end
uint32_t end = Kaleidoscope.millisAtCycleStart();
ASSERT_EQ((end - start), interval);
}
};
TEST_F(SimulatorTiming, SimulatorStart) {
// Time doesn't advance in the simulator until after the first cycle runs
ASSERT_EQ(Kaleidoscope.millisAtCycleStart(), t_0) << "Clock is at 0 ms before we do anything";
RunCycle();
ASSERT_EQ(Kaleidoscope.millisAtCycleStart(), t_1) << "Clock is at 1 ms after the first cycle";
}
TEST_F(SimulatorTiming, TimeElapses) {
assertTimeElapses(t_1);
assertTimeElapses(t_100);
assertTimeElapses(t_500);
}
TEST_F(SimulatorTiming, ZeroTimeElapses) {
assertTimeElapses(t_0);
}
TEST_F(SimulatorTiming, LongTimeElapses) {
// Bigger number than uint16_t can hold
assertTimeElapses(t_100_000);
}
TEST_F(SimulatorTiming, 3msPerCycleTestRunCycles) {
sim_.SetCycleTime(3);
// Record time at start
uint32_t start = Kaleidoscope.millisAtCycleStart();
// Run cycles until the given amount of time has elapsed
sim_.RunCycles(1);
// Record time at end
uint32_t end = Kaleidoscope.millisAtCycleStart();
ASSERT_EQ((end - start), 3) << "Start was " << start << " and end was " << end;
// Record time at start
start = Kaleidoscope.millisAtCycleStart();
// Run cycles until the given amount of time has elapsed
sim_.RunCycles(10);
// Record time at end
end = Kaleidoscope.millisAtCycleStart();
ASSERT_EQ((end - start), 30) << "Start was " << start << " and end was " << end;
}
TEST_F(SimulatorTiming, 4msPerCycleTestRunForMillis) {
sim_.SetCycleTime(4);
// Record time at start
uint32_t start = Kaleidoscope.millisAtCycleStart();
// Run cycles until the given amount of time has elapsed
sim_.RunForMillis(40);
// Record time at end
uint32_t end = Kaleidoscope.millisAtCycleStart();
ASSERT_EQ((end - start), 40);
}
} // namespace
} // namespace testing
} // namespace kaleidoscope