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/******************************************************************************
*
* Copyright (C) 2015 Google, Inc.
*
* 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 <gtest/gtest.h>
#include "AllocationTestHarness.h"
#include "osi/include/time.h"
// Generous upper bound: 10 seconds
static const uint32_t TEST_TIME_DELTA_UPPER_BOUND_MS = 10 * 1000;
class TimeTest : public AllocationTestHarness {};
//
// Test that the return value of time_get_os_boottime_ms() is not zero.
//
// NOTE: For now this test is disabled, because the return value
// of time_get_os_boottime_ms() is 32-bits integer that could wrap-around
// in 49.7 days. It should be re-enabled if/after the wrap-around issue
// is resolved (e.g., if the return value is 64-bits integer).
//
#if 0
TEST_F(TimeTest, test_time_get_os_boottime_ms_not_zero) {
uint32_t t1 = time_get_os_boottime_ms();
ASSERT_TRUE(t1 > 0);
}
#endif
//
// Test that the return value of time_get_os_boottime_us() is not zero.
//
TEST_F(TimeTest, test_time_get_os_boottime_us_not_zero) {
uint64_t t1 = time_get_os_boottime_us();
ASSERT_TRUE(t1 > 0);
}
//
// Test that the return value of time_get_os_boottime_ms()
// is monotonically increasing within reasonable boundries.
//
TEST_F(TimeTest, test_time_get_os_boottime_ms_increases_upper_bound) {
uint32_t t1 = time_get_os_boottime_ms();
uint32_t t2 = time_get_os_boottime_ms();
ASSERT_TRUE((t2 - t1) < TEST_TIME_DELTA_UPPER_BOUND_MS);
}
//
// Test that the return value of time_get_os_boottime_us()
// is monotonically increasing within reasonable boundries.
//
TEST_F(TimeTest, test_time_get_os_boottime_us_increases_upper_bound) {
uint64_t t1 = time_get_os_boottime_us();
uint64_t t2 = time_get_os_boottime_us();
ASSERT_TRUE((t2 - t1) < TEST_TIME_DELTA_UPPER_BOUND_MS * 1000);
}
//
// Test that the return value of time_get_os_boottime_ms()
// is increasing.
//
TEST_F(TimeTest, test_time_get_os_boottime_ms_increases_lower_bound) {
static const uint32_t TEST_TIME_SLEEP_MS = 100;
struct timespec delay;
delay.tv_sec = TEST_TIME_SLEEP_MS / 1000;
delay.tv_nsec = 1000 * 1000 * (TEST_TIME_SLEEP_MS % 1000);
// Take two timestamps with sleep in-between
uint32_t t1 = time_get_os_boottime_ms();
int err = nanosleep(&delay, &delay);
uint32_t t2 = time_get_os_boottime_ms();
ASSERT_TRUE(err == 0);
ASSERT_TRUE((t2 - t1) >= TEST_TIME_SLEEP_MS);
ASSERT_TRUE((t2 - t1) < TEST_TIME_DELTA_UPPER_BOUND_MS);
}
//
// Test that the return value of time_get_os_boottime_us()
// is increasing.
//
TEST_F(TimeTest, test_time_get_os_boottime_us_increases_lower_bound) {
static const uint64_t TEST_TIME_SLEEP_US = 100 * 1000;
struct timespec delay;
delay.tv_sec = TEST_TIME_SLEEP_US / (1000 * 1000);
delay.tv_nsec = 1000 * (TEST_TIME_SLEEP_US % (1000 * 1000));
// Take two timestamps with sleep in-between
uint64_t t1 = time_get_os_boottime_us();
int err = nanosleep(&delay, &delay);
uint64_t t2 = time_get_os_boottime_us();
ASSERT_TRUE(err == 0);
ASSERT_TRUE(t2 > t1);
ASSERT_TRUE((t2 - t1) >= TEST_TIME_SLEEP_US);
ASSERT_TRUE((t2 - t1) < TEST_TIME_DELTA_UPPER_BOUND_MS * 1000);
}
//
// Test that the return value of time_gettimeofday_us() is not zero.
//
TEST_F(TimeTest, test_time_gettimeofday_us_not_zero) {
uint64_t t1 = time_gettimeofday_us();
ASSERT_TRUE(t1 > 0);
}
//
// Test that the return value of time_gettimeofday_us()
// is monotonically increasing within reasonable boundaries.
//
TEST_F(TimeTest, test_time_gettimeofday_us_increases_upper_bound) {
uint64_t t1 = time_gettimeofday_us();
uint64_t t2 = time_gettimeofday_us();
ASSERT_TRUE((t2 - t1) < TEST_TIME_DELTA_UPPER_BOUND_MS * 1000);
}
//
// Test that the return value of time_gettimeofday_us()
// is increasing.
//
TEST_F(TimeTest, test_time_gettimeofday_us_increases_lower_bound) {
static const uint64_t TEST_TIME_SLEEP_US = 100 * 1000;
struct timespec delay;
delay.tv_sec = TEST_TIME_SLEEP_US / (1000 * 1000);
delay.tv_nsec = 1000 * (TEST_TIME_SLEEP_US % (1000 * 1000));
// Take two timestamps with sleep in-between
uint64_t t1 = time_gettimeofday_us();
int err = nanosleep(&delay, &delay);
uint64_t t2 = time_gettimeofday_us();
ASSERT_TRUE(err == 0);
ASSERT_TRUE(t2 > t1);
ASSERT_TRUE((t2 - t1) >= TEST_TIME_SLEEP_US);
ASSERT_TRUE((t2 - t1) < TEST_TIME_DELTA_UPPER_BOUND_MS * 1000);
}
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