/******************************************************************************
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*
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* Copyright 2015 Google, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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#include <gtest/gtest.h>
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#include "common/time_util.h"
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// Generous upper bound: 10 seconds
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static const uint32_t TEST_TIME_DELTA_UPPER_BOUND_MS = 10 * 1000;
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//
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// Test that the return value of bluetooth::common::time_get_os_boottime_ms() is
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// not zero.
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//
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TEST(TimeTest, test_time_get_os_boottime_ms_not_zero) {
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uint64_t t1 = bluetooth::common::time_get_os_boottime_ms();
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ASSERT_GT(t1, uint64_t(0));
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}
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//
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// Test that the return value of bluetooth::common::time_get_os_boottime_us() is
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// not zero.
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//
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TEST(TimeTest, test_time_get_os_boottime_us_not_zero) {
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uint64_t t1 = bluetooth::common::time_get_os_boottime_us();
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ASSERT_GT(t1, uint64_t(0));
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}
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//
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// Test that the return value of bluetooth::common::time_get_os_boottime_ms()
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// is monotonically increasing within reasonable boundries.
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//
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TEST(TimeTest, test_time_get_os_boottime_ms_increases_upper_bound) {
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uint64_t t1 = bluetooth::common::time_get_os_boottime_ms();
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uint64_t t2 = bluetooth::common::time_get_os_boottime_ms();
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ASSERT_TRUE((t2 - t1) < TEST_TIME_DELTA_UPPER_BOUND_MS);
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}
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//
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// Test that the return value of bluetooth::common::time_get_os_boottime_us()
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// is monotonically increasing within reasonable boundries.
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//
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TEST(TimeTest, test_time_get_os_boottime_us_increases_upper_bound) {
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uint64_t t1 = bluetooth::common::time_get_os_boottime_us();
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uint64_t t2 = bluetooth::common::time_get_os_boottime_us();
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ASSERT_TRUE((t2 - t1) < TEST_TIME_DELTA_UPPER_BOUND_MS * 1000);
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}
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//
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// Test that the return value of bluetooth::common::time_get_os_boottime_ms()
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// is increasing.
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//
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TEST(TimeTest, test_time_get_os_boottime_ms_increases_lower_bound) {
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static const uint32_t TEST_TIME_SLEEP_MS = 100;
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struct timespec delay = {};
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delay.tv_sec = TEST_TIME_SLEEP_MS / 1000;
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delay.tv_nsec = 1000 * 1000 * (TEST_TIME_SLEEP_MS % 1000);
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// Take two timestamps with sleep in-between
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uint64_t t1 = bluetooth::common::time_get_os_boottime_ms();
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int err = nanosleep(&delay, &delay);
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uint64_t t2 = bluetooth::common::time_get_os_boottime_ms();
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ASSERT_EQ(err, 0);
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ASSERT_TRUE((t2 - t1) >= TEST_TIME_SLEEP_MS);
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ASSERT_TRUE((t2 - t1) < TEST_TIME_DELTA_UPPER_BOUND_MS);
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}
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//
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// Test that the return value of bluetooth::common::time_get_os_boottime_us()
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// is increasing.
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//
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TEST(TimeTest, test_time_get_os_boottime_us_increases_lower_bound) {
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static const uint64_t TEST_TIME_SLEEP_US = 100 * 1000;
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struct timespec delay = {};
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delay.tv_sec = TEST_TIME_SLEEP_US / (1000 * 1000);
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delay.tv_nsec = 1000 * (TEST_TIME_SLEEP_US % (1000 * 1000));
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// Take two timestamps with sleep in-between
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uint64_t t1 = bluetooth::common::time_get_os_boottime_us();
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int err = nanosleep(&delay, &delay);
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uint64_t t2 = bluetooth::common::time_get_os_boottime_us();
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ASSERT_EQ(err, 0);
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ASSERT_GT(t2, t1);
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ASSERT_TRUE((t2 - t1) >= TEST_TIME_SLEEP_US);
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ASSERT_TRUE((t2 - t1) < TEST_TIME_DELTA_UPPER_BOUND_MS * 1000);
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}
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//
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// Test that the return value of bluetooth::common::time_gettimeofday_us() is
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// not zero.
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//
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TEST(TimeTest, test_time_gettimeofday_us_not_zero) {
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uint64_t t1 = bluetooth::common::time_gettimeofday_us();
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ASSERT_GT(t1, uint64_t(0));
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}
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//
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// Test that the return value of bluetooth::common::time_gettimeofday_us()
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// is monotonically increasing within reasonable boundaries.
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//
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TEST(TimeTest, test_time_gettimeofday_us_increases_upper_bound) {
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uint64_t t1 = bluetooth::common::time_gettimeofday_us();
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uint64_t t2 = bluetooth::common::time_gettimeofday_us();
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ASSERT_TRUE((t2 - t1) < TEST_TIME_DELTA_UPPER_BOUND_MS * 1000);
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}
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//
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// Test that the return value of bluetooth::common::time_gettimeofday_us()
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// is increasing.
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//
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TEST(TimeTest, test_time_gettimeofday_us_increases_lower_bound) {
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static const uint64_t TEST_TIME_SLEEP_US = 100 * 1000;
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struct timespec delay = {};
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delay.tv_sec = TEST_TIME_SLEEP_US / (1000 * 1000);
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delay.tv_nsec = 1000 * (TEST_TIME_SLEEP_US % (1000 * 1000));
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// Take two timestamps with sleep in-between
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uint64_t t1 = bluetooth::common::time_gettimeofday_us();
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int err = nanosleep(&delay, &delay);
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uint64_t t2 = bluetooth::common::time_gettimeofday_us();
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ASSERT_EQ(err, 0);
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ASSERT_GT(t2, t1);
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ASSERT_TRUE((t2 - t1) >= TEST_TIME_SLEEP_US);
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ASSERT_TRUE((t2 - t1) < TEST_TIME_DELTA_UPPER_BOUND_MS * 1000);
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}
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