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/*
* Copyright © Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 or 3,
* as published by the Free Software Foundation.
*
* 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 "mir/time/posix_timestamp.h"
#include <gtest/gtest.h>
using namespace std::chrono_literals;
using namespace mir::time;
TEST(PosixTimestamp, equal)
{
EXPECT_TRUE(PosixTimestamp(CLOCK_MONOTONIC,123ns) ==
PosixTimestamp(CLOCK_MONOTONIC,123ns));
EXPECT_FALSE(PosixTimestamp(CLOCK_MONOTONIC,123ns) ==
PosixTimestamp(CLOCK_MONOTONIC,456ns));
EXPECT_FALSE(PosixTimestamp(CLOCK_MONOTONIC,123ns) ==
PosixTimestamp(CLOCK_REALTIME,123ns));
EXPECT_FALSE(PosixTimestamp(CLOCK_MONOTONIC,0ns) ==
PosixTimestamp(CLOCK_REALTIME,0ns));
}
TEST(PosixTimestamp, subtract)
{
EXPECT_EQ(PosixTimestamp(CLOCK_MONOTONIC,333ns),
PosixTimestamp(CLOCK_MONOTONIC,789ns) - 456ns);
EXPECT_EQ(PosixTimestamp(CLOCK_REALTIME,0ns),
PosixTimestamp(CLOCK_REALTIME,123ns) - 123ns);
EXPECT_EQ(456ns,
PosixTimestamp(CLOCK_MONOTONIC,789ns) -
PosixTimestamp(CLOCK_MONOTONIC,333ns));
EXPECT_THROW(
PosixTimestamp(CLOCK_MONOTONIC,789ns) -
PosixTimestamp(CLOCK_REALTIME,333ns),
std::logic_error);
}
TEST(PosixTimestamp, add)
{
EXPECT_EQ(PosixTimestamp(CLOCK_MONOTONIC,579ns),
PosixTimestamp(CLOCK_MONOTONIC,456ns) + 123ns);
EXPECT_EQ(PosixTimestamp(CLOCK_REALTIME,0ns),
PosixTimestamp(CLOCK_REALTIME,123ns) + -123ns);
}
TEST(PosixTimestamp, modulo)
{
EXPECT_EQ(654321ns,
PosixTimestamp(CLOCK_MONOTONIC,987654321ns) % 1000000ns);
}
TEST(PosixTimestamp, comparison)
{
PosixTimestamp const a(CLOCK_MONOTONIC, 111ns);
PosixTimestamp const aa(CLOCK_REALTIME, 111ns);
PosixTimestamp const b(CLOCK_MONOTONIC, 333ns);
PosixTimestamp const bb(CLOCK_REALTIME, 333ns);
EXPECT_TRUE(a < b);
EXPECT_TRUE(b > a);
EXPECT_TRUE(aa < bb);
EXPECT_TRUE(bb > aa);
EXPECT_THROW((void)(a < bb), std::logic_error);
EXPECT_THROW((void)(a > bb), std::logic_error);
EXPECT_THROW((void)(aa > b), std::logic_error);
EXPECT_THROW((void)(aa < b), std::logic_error);
EXPECT_TRUE(a <= b);
EXPECT_TRUE(a <= a);
EXPECT_TRUE(b >= a);
EXPECT_TRUE(b >= b);
EXPECT_TRUE(aa <= bb);
EXPECT_TRUE(aa <= aa);
EXPECT_TRUE(bb >= aa);
EXPECT_TRUE(bb >= bb);
EXPECT_THROW((void)(a <= bb), std::logic_error);
EXPECT_THROW((void)(a >= bb), std::logic_error);
EXPECT_THROW((void)(aa >= b), std::logic_error);
EXPECT_THROW((void)(aa <= b), std::logic_error);
}
TEST(PosixTimestamp, sleeps)
{
auto const start = PosixTimestamp::now(CLOCK_MONOTONIC);
auto const expected = 123456789ns;
sleep_until(start + expected);
auto const end = PosixTimestamp::now(CLOCK_MONOTONIC);
auto const observed = end - start;
EXPECT_LE(expected, observed);
EXPECT_GT(100*expected, observed);
}
TEST(PosixTimestamp, wait_for_the_past_is_immediate)
{
auto const start = PosixTimestamp::now(CLOCK_MONOTONIC);
auto const the_past = start - 9876543210ns;
sleep_until(the_past);
auto const end = PosixTimestamp::now(CLOCK_MONOTONIC);
auto const delay = end - start;
EXPECT_GT(5s, delay);
}
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