src/util/tests/timespec_test.cpp - third_party/mesa - Git at Google

 /*
  * Copyright © 2016 Collabora, Ltd.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
  * "Software"), to deal in the Software without restriction, including
  * without limitation the rights to use, copy, modify, merge, publish,
  * distribute, sublicense, and/or sell copies of the Software, and to
  * permit persons to whom the Software is furnished to do so, subject to
  * the following conditions:
  *
  * The above copyright notice and this permission notice (including the
  * next paragraph) shall be included in all copies or substantial
  * portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */

 #include <gtest/gtest.h>

 #include "c11/time.h"
 #include "util/timespec.h"

 #include <limits>

 TEST(timespec_test, timespec_add)
 {
    struct timespec a, b, r;

    a.tv_sec = 1;
    a.tv_nsec = NSEC_PER_SEC - 1;
    b.tv_sec = 1;
    b.tv_nsec = 2;
    timespec_add(&r, &a, &b);
    EXPECT_EQ(r.tv_sec, 3);
    EXPECT_EQ(r.tv_nsec, 1);
 }

 TEST(timespec_test, timespec_sub)
 {
    struct timespec a, b, r;

    a.tv_sec = 1;
    a.tv_nsec = 1;
    b.tv_sec = 0;
    b.tv_nsec = 2;
    timespec_sub(&r, &a, &b);
    EXPECT_EQ(r.tv_sec, 0);
    EXPECT_EQ(r.tv_nsec, NSEC_PER_SEC - 1);
 }

 TEST(timespec_test, timespec_to_nsec)
 {
    struct timespec a;

    a.tv_sec = 4;
    a.tv_nsec = 4;
    EXPECT_EQ(timespec_to_nsec(&a), (NSEC_PER_SEC * 4ULL) + 4);
 }

 TEST(timespec_test, timespec_to_usec)
 {
    struct timespec a;

    a.tv_sec = 4;
    a.tv_nsec = 4000;
    EXPECT_EQ(timespec_to_usec(&a), (4000000ULL) + 4);
 }

 TEST(timespec_test, timespec_to_msec)
 {
    struct timespec a;

    a.tv_sec = 4;
    a.tv_nsec = 4000000;
    EXPECT_EQ(timespec_to_msec(&a), (4000ULL) + 4);
 }

 TEST(timespec_test, timespec_to_proto)
 {
    struct timespec a;
    uint32_t tv_sec_hi;
    uint32_t tv_sec_lo;
    uint32_t tv_nsec;

    a.tv_sec = 0;
    a.tv_nsec = 0;
    timespec_to_proto(&a, &tv_sec_hi, &tv_sec_lo, &tv_nsec);
    EXPECT_EQ(0, tv_sec_hi);
    EXPECT_EQ(0, tv_sec_lo);
    EXPECT_EQ(0, tv_nsec);

    a.tv_sec = 1234;
    a.tv_nsec = NSEC_PER_SEC - 1;
    timespec_to_proto(&a, &tv_sec_hi, &tv_sec_lo, &tv_nsec);
    EXPECT_EQ(0, tv_sec_hi);
    EXPECT_EQ(1234, tv_sec_lo);
    EXPECT_EQ(NSEC_PER_SEC - 1, tv_nsec);

    a.tv_sec = (time_t)0x7000123470005678LL;
    a.tv_nsec = 1;
    timespec_to_proto(&a, &tv_sec_hi, &tv_sec_lo, &tv_nsec);
    EXPECT_EQ((uint64_t)a.tv_sec >> 32, tv_sec_hi);
    EXPECT_EQ(0x70005678, tv_sec_lo);
    EXPECT_EQ(1, tv_nsec);
 }

 TEST(timespec_test, millihz_to_nsec)
 {
    EXPECT_EQ(millihz_to_nsec(60000), 16666666);
 }

 TEST(timespec_test, time_t_max)
 {
    /* The TIME_T_MAX macro assumes it's no more than 64 bits */
    EXPECT_LE(sizeof(time_t), sizeof(uint64_t));

    time_t t = TIME_T_MAX;
    EXPECT_EQ((uint64_t)t, (uint64_t)TIME_T_MAX);

    /* Since the tests are C++ code, we have std::numeric_limits */
    EXPECT_EQ(std::numeric_limits<time_t>::max(), TIME_T_MAX);
 }

 TEST(timespec_test, timespec_add_nsec)
 {
    struct timespec a, r;

    a.tv_sec = 0;
    a.tv_nsec = NSEC_PER_SEC - 1;
    EXPECT_FALSE(timespec_add_nsec(&r, &a, 1));
    EXPECT_EQ(1, r.tv_sec);
    EXPECT_EQ(0, r.tv_nsec);

    EXPECT_FALSE(timespec_add_nsec(&r, &a, 2));
    EXPECT_EQ(1, r.tv_sec);
    EXPECT_EQ(1, r.tv_nsec);

    EXPECT_FALSE(timespec_add_nsec(&r, &a, (NSEC_PER_SEC * 2ULL)));
    EXPECT_EQ(2, r.tv_sec);
    EXPECT_EQ(NSEC_PER_SEC - 1, r.tv_nsec);

    EXPECT_FALSE(timespec_add_nsec(&r, &a, (NSEC_PER_SEC * 2ULL) + 2));
    EXPECT_EQ(r.tv_sec, 3);
    EXPECT_EQ(r.tv_nsec, 1);

    r.tv_sec = 4;
    r.tv_nsec = 0;
    EXPECT_FALSE(timespec_add_nsec(&r, &r, NSEC_PER_SEC + 10ULL));
    EXPECT_EQ(5, r.tv_sec);
    EXPECT_EQ(10, r.tv_nsec);

    EXPECT_FALSE(timespec_add_nsec(&r, &r, (NSEC_PER_SEC * 3ULL) - 9ULL));
    EXPECT_EQ(8, r.tv_sec);
    EXPECT_EQ(1, r.tv_nsec);

    EXPECT_FALSE(timespec_add_nsec(&r, &r, (NSEC_PER_SEC * 7ULL) +
                                           (NSEC_PER_SEC - 1ULL)));
    EXPECT_EQ(16, r.tv_sec);
    EXPECT_EQ(0, r.tv_nsec);

    a.tv_sec = TIME_T_MAX;
    a.tv_nsec = 0;
    EXPECT_TRUE(timespec_add_nsec(&r, &a, UINT64_MAX));

    a.tv_sec = TIME_T_MAX;
    a.tv_nsec = 0;
    EXPECT_TRUE(timespec_add_nsec(&r, &a, NSEC_PER_SEC));

    a.tv_sec = TIME_T_MAX;
    a.tv_nsec = NSEC_PER_SEC / 2;
    EXPECT_TRUE(timespec_add_nsec(&r, &a, NSEC_PER_SEC / 2));
 }

 TEST(timespec_test, timespec_add_msec)
 {
    struct timespec a, r;

    a.tv_sec = 1000;
    a.tv_nsec = 1;
    timespec_add_msec(&r, &a, 2002);
    EXPECT_EQ(1002, r.tv_sec);
    EXPECT_EQ(2000001, r.tv_nsec);
 }

 TEST(timespec_test, timespec_sub_to_nsec)
 {
    struct timespec a, b;

    a.tv_sec = 1000;
    a.tv_nsec = 1;
    b.tv_sec = 1;
    b.tv_nsec = 2;
    EXPECT_EQ((999LL * NSEC_PER_SEC) - 1, timespec_sub_to_nsec(&a, &b));
 }

 TEST(timespec_test, timespec_sub_to_msec)
 {
    struct timespec a, b;

    a.tv_sec = 1000;
    a.tv_nsec = 2000000L;
    b.tv_sec = 2;
    b.tv_nsec = 1000000L;
    EXPECT_EQ((998 * 1000) + 1, timespec_sub_to_msec(&a, &b));
 }

 TEST(timespec_test, timespec_from_nsec)
 {
    struct timespec a;

    timespec_from_nsec(&a, 0);
    EXPECT_EQ(0, a.tv_sec);
    EXPECT_EQ(0, a.tv_nsec);

    timespec_from_nsec(&a, NSEC_PER_SEC - 1);
    EXPECT_EQ(0, a.tv_sec);
    EXPECT_EQ(NSEC_PER_SEC - 1, a.tv_nsec);

    timespec_from_nsec(&a, NSEC_PER_SEC);
    EXPECT_EQ(1, a.tv_sec);
    EXPECT_EQ(0, a.tv_nsec);

    timespec_from_nsec(&a, (5LL * NSEC_PER_SEC) + 1);
    EXPECT_EQ(5, a.tv_sec);
    EXPECT_EQ(1, a.tv_nsec);

    timespec_from_nsec(&a, UINT64_MAX);
    EXPECT_EQ(a.tv_nsec, UINT64_MAX % NSEC_PER_SEC);
    EXPECT_EQ(a.tv_sec, (time_t)(UINT64_MAX / NSEC_PER_SEC));
 }

 TEST(timespec_test, timespec_from_usec)
 {
    struct timespec a;

    timespec_from_usec(&a, 0);
    EXPECT_EQ(0, a.tv_sec);
    EXPECT_EQ(0, a.tv_nsec);

    timespec_from_usec(&a, 999999);
    EXPECT_EQ(0, a.tv_sec);
    EXPECT_EQ(999999 * 1000, a.tv_nsec);

    timespec_from_usec(&a, 1000000);
    EXPECT_EQ(1, a.tv_sec);
    EXPECT_EQ(0, a.tv_nsec);

    timespec_from_usec(&a, 5000001);
    EXPECT_EQ(5, a.tv_sec);
    EXPECT_EQ(1000, a.tv_nsec);
 }

 TEST(timespec_test, timespec_from_msec)
 {
    struct timespec a;

    timespec_from_msec(&a, 0);
    EXPECT_EQ(0, a.tv_sec);
    EXPECT_EQ(0, a.tv_nsec);

    timespec_from_msec(&a, 999);
    EXPECT_EQ(0, a.tv_sec);
    EXPECT_EQ(999 * 1000000, a.tv_nsec);

    timespec_from_msec(&a, 1000);
    EXPECT_EQ(1, a.tv_sec);
    EXPECT_EQ(0, a.tv_nsec);

    timespec_from_msec(&a, 5001);
    EXPECT_EQ(5, a.tv_sec);
    EXPECT_EQ(1000000, a.tv_nsec);
 }

 TEST(timespec_test, timespec_from_proto)
 {
    struct timespec a;

    timespec_from_proto(&a, 0, 0, 0);
    EXPECT_EQ(0, a.tv_sec);
    EXPECT_EQ(0, a.tv_nsec);

    timespec_from_proto(&a, 0, 1234, 9999);
    EXPECT_EQ(1234, a.tv_sec);
    EXPECT_EQ(9999, a.tv_nsec);

    timespec_from_proto(&a, 0x1234, 0x5678, 1);
    EXPECT_EQ((time_t)0x0000123400005678LL, a.tv_sec);
    EXPECT_EQ(1, a.tv_nsec);
 }

 TEST(timespec_test, timespec_is_zero)
 {
    struct timespec zero = { 0 };
    struct timespec non_zero_sec = { 1, 0 };
    struct timespec non_zero_nsec = { 0, 1 };

    EXPECT_TRUE(timespec_is_zero(&zero));
    EXPECT_FALSE(timespec_is_zero(&non_zero_nsec));
    EXPECT_FALSE(timespec_is_zero(&non_zero_sec));
 }

 TEST(timespec_test, timespec_eq)
 {
    struct timespec a = { 2, 1 };
    struct timespec b = { -1, 2 };

    EXPECT_TRUE(timespec_eq(&a, &a));
    EXPECT_TRUE(timespec_eq(&b, &b));

    EXPECT_FALSE(timespec_eq(&a, &b));
    EXPECT_FALSE(timespec_eq(&b, &a));
 }

 TEST(timespec_test, timespec_get)
 {
    struct timespec a;
    struct timespec b;
    time_t t;
    timespec_get(&a, TIME_UTC);
    time(&t);
    timespec_get(&b, TIME_UTC);
    /* `t + 1` and `t - 1` are used intentionally for avoid flakes */
    EXPECT_LE(a.tv_sec, t + 1);
    EXPECT_LE(t - 1, b.tv_sec);
 }
	/*
	* Copyright © 2016 Collabora, Ltd.
	*
	* Permission is hereby granted, free of charge, to any person obtaining
	* a copy of this software and associated documentation files (the
	* "Software"), to deal in the Software without restriction, including
	* without limitation the rights to use, copy, modify, merge, publish,
	* distribute, sublicense, and/or sell copies of the Software, and to
	* permit persons to whom the Software is furnished to do so, subject to
	* the following conditions:
	*
	* The above copyright notice and this permission notice (including the
	* next paragraph) shall be included in all copies or substantial
	* portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	* SOFTWARE.
	*/

	#include <gtest/gtest.h>

	#include "c11/time.h"
	#include "util/timespec.h"

	#include <limits>

	TEST(timespec_test, timespec_add)
	{
	struct timespec a, b, r;

	a.tv_sec = 1;
	a.tv_nsec = NSEC_PER_SEC - 1;
	b.tv_sec = 1;
	b.tv_nsec = 2;
	timespec_add(&r, &a, &b);
	EXPECT_EQ(r.tv_sec, 3);
	EXPECT_EQ(r.tv_nsec, 1);
	}

	TEST(timespec_test, timespec_sub)
	{
	struct timespec a, b, r;

	a.tv_sec = 1;
	a.tv_nsec = 1;
	b.tv_sec = 0;
	b.tv_nsec = 2;
	timespec_sub(&r, &a, &b);
	EXPECT_EQ(r.tv_sec, 0);
	EXPECT_EQ(r.tv_nsec, NSEC_PER_SEC - 1);
	}

	TEST(timespec_test, timespec_to_nsec)
	{
	struct timespec a;

	a.tv_sec = 4;
	a.tv_nsec = 4;
	EXPECT_EQ(timespec_to_nsec(&a), (NSEC_PER_SEC * 4ULL) + 4);
	}

	TEST(timespec_test, timespec_to_usec)
	{
	struct timespec a;

	a.tv_sec = 4;
	a.tv_nsec = 4000;
	EXPECT_EQ(timespec_to_usec(&a), (4000000ULL) + 4);
	}

	TEST(timespec_test, timespec_to_msec)
	{
	struct timespec a;

	a.tv_sec = 4;
	a.tv_nsec = 4000000;
	EXPECT_EQ(timespec_to_msec(&a), (4000ULL) + 4);
	}

	TEST(timespec_test, timespec_to_proto)
	{
	struct timespec a;
	uint32_t tv_sec_hi;
	uint32_t tv_sec_lo;
	uint32_t tv_nsec;

	a.tv_sec = 0;
	a.tv_nsec = 0;
	timespec_to_proto(&a, &tv_sec_hi, &tv_sec_lo, &tv_nsec);
	EXPECT_EQ(0, tv_sec_hi);
	EXPECT_EQ(0, tv_sec_lo);
	EXPECT_EQ(0, tv_nsec);

	a.tv_sec = 1234;
	a.tv_nsec = NSEC_PER_SEC - 1;
	timespec_to_proto(&a, &tv_sec_hi, &tv_sec_lo, &tv_nsec);
	EXPECT_EQ(0, tv_sec_hi);
	EXPECT_EQ(1234, tv_sec_lo);
	EXPECT_EQ(NSEC_PER_SEC - 1, tv_nsec);

	a.tv_sec = (time_t)0x7000123470005678LL;
	a.tv_nsec = 1;
	timespec_to_proto(&a, &tv_sec_hi, &tv_sec_lo, &tv_nsec);
	EXPECT_EQ((uint64_t)a.tv_sec >> 32, tv_sec_hi);
	EXPECT_EQ(0x70005678, tv_sec_lo);
	EXPECT_EQ(1, tv_nsec);
	}

	TEST(timespec_test, millihz_to_nsec)
	{
	EXPECT_EQ(millihz_to_nsec(60000), 16666666);
	}

	TEST(timespec_test, time_t_max)
	{
	/* The TIME_T_MAX macro assumes it's no more than 64 bits */
	EXPECT_LE(sizeof(time_t), sizeof(uint64_t));

	time_t t = TIME_T_MAX;
	EXPECT_EQ((uint64_t)t, (uint64_t)TIME_T_MAX);

	/* Since the tests are C++ code, we have std::numeric_limits */
	EXPECT_EQ(std::numeric_limits<time_t>::max(), TIME_T_MAX);
	}

	TEST(timespec_test, timespec_add_nsec)
	{
	struct timespec a, r;

	a.tv_sec = 0;
	a.tv_nsec = NSEC_PER_SEC - 1;
	EXPECT_FALSE(timespec_add_nsec(&r, &a, 1));
	EXPECT_EQ(1, r.tv_sec);
	EXPECT_EQ(0, r.tv_nsec);

	EXPECT_FALSE(timespec_add_nsec(&r, &a, 2));
	EXPECT_EQ(1, r.tv_sec);
	EXPECT_EQ(1, r.tv_nsec);

	EXPECT_FALSE(timespec_add_nsec(&r, &a, (NSEC_PER_SEC * 2ULL)));
	EXPECT_EQ(2, r.tv_sec);
	EXPECT_EQ(NSEC_PER_SEC - 1, r.tv_nsec);

	EXPECT_FALSE(timespec_add_nsec(&r, &a, (NSEC_PER_SEC * 2ULL) + 2));
	EXPECT_EQ(r.tv_sec, 3);
	EXPECT_EQ(r.tv_nsec, 1);

	r.tv_sec = 4;
	r.tv_nsec = 0;
	EXPECT_FALSE(timespec_add_nsec(&r, &r, NSEC_PER_SEC + 10ULL));
	EXPECT_EQ(5, r.tv_sec);
	EXPECT_EQ(10, r.tv_nsec);

	EXPECT_FALSE(timespec_add_nsec(&r, &r, (NSEC_PER_SEC * 3ULL) - 9ULL));
	EXPECT_EQ(8, r.tv_sec);
	EXPECT_EQ(1, r.tv_nsec);

	EXPECT_FALSE(timespec_add_nsec(&r, &r, (NSEC_PER_SEC * 7ULL) +
	(NSEC_PER_SEC - 1ULL)));
	EXPECT_EQ(16, r.tv_sec);
	EXPECT_EQ(0, r.tv_nsec);

	a.tv_sec = TIME_T_MAX;
	a.tv_nsec = 0;
	EXPECT_TRUE(timespec_add_nsec(&r, &a, UINT64_MAX));

	a.tv_sec = TIME_T_MAX;
	a.tv_nsec = 0;
	EXPECT_TRUE(timespec_add_nsec(&r, &a, NSEC_PER_SEC));

	a.tv_sec = TIME_T_MAX;
	a.tv_nsec = NSEC_PER_SEC / 2;
	EXPECT_TRUE(timespec_add_nsec(&r, &a, NSEC_PER_SEC / 2));
	}

	TEST(timespec_test, timespec_add_msec)
	{
	struct timespec a, r;

	a.tv_sec = 1000;
	a.tv_nsec = 1;
	timespec_add_msec(&r, &a, 2002);
	EXPECT_EQ(1002, r.tv_sec);
	EXPECT_EQ(2000001, r.tv_nsec);
	}

	TEST(timespec_test, timespec_sub_to_nsec)
	{
	struct timespec a, b;

	a.tv_sec = 1000;
	a.tv_nsec = 1;
	b.tv_sec = 1;
	b.tv_nsec = 2;
	EXPECT_EQ((999LL * NSEC_PER_SEC) - 1, timespec_sub_to_nsec(&a, &b));
	}

	TEST(timespec_test, timespec_sub_to_msec)
	{
	struct timespec a, b;

	a.tv_sec = 1000;
	a.tv_nsec = 2000000L;
	b.tv_sec = 2;
	b.tv_nsec = 1000000L;
	EXPECT_EQ((998 * 1000) + 1, timespec_sub_to_msec(&a, &b));
	}

	TEST(timespec_test, timespec_from_nsec)
	{
	struct timespec a;

	timespec_from_nsec(&a, 0);
	EXPECT_EQ(0, a.tv_sec);
	EXPECT_EQ(0, a.tv_nsec);

	timespec_from_nsec(&a, NSEC_PER_SEC - 1);
	EXPECT_EQ(0, a.tv_sec);
	EXPECT_EQ(NSEC_PER_SEC - 1, a.tv_nsec);

	timespec_from_nsec(&a, NSEC_PER_SEC);
	EXPECT_EQ(1, a.tv_sec);
	EXPECT_EQ(0, a.tv_nsec);

	timespec_from_nsec(&a, (5LL * NSEC_PER_SEC) + 1);
	EXPECT_EQ(5, a.tv_sec);
	EXPECT_EQ(1, a.tv_nsec);

	timespec_from_nsec(&a, UINT64_MAX);
	EXPECT_EQ(a.tv_nsec, UINT64_MAX % NSEC_PER_SEC);
	EXPECT_EQ(a.tv_sec, (time_t)(UINT64_MAX / NSEC_PER_SEC));
	}

	TEST(timespec_test, timespec_from_usec)
	{
	struct timespec a;

	timespec_from_usec(&a, 0);
	EXPECT_EQ(0, a.tv_sec);
	EXPECT_EQ(0, a.tv_nsec);

	timespec_from_usec(&a, 999999);
	EXPECT_EQ(0, a.tv_sec);
	EXPECT_EQ(999999 * 1000, a.tv_nsec);

	timespec_from_usec(&a, 1000000);
	EXPECT_EQ(1, a.tv_sec);
	EXPECT_EQ(0, a.tv_nsec);

	timespec_from_usec(&a, 5000001);
	EXPECT_EQ(5, a.tv_sec);
	EXPECT_EQ(1000, a.tv_nsec);
	}

	TEST(timespec_test, timespec_from_msec)
	{
	struct timespec a;

	timespec_from_msec(&a, 0);
	EXPECT_EQ(0, a.tv_sec);
	EXPECT_EQ(0, a.tv_nsec);

	timespec_from_msec(&a, 999);
	EXPECT_EQ(0, a.tv_sec);
	EXPECT_EQ(999 * 1000000, a.tv_nsec);

	timespec_from_msec(&a, 1000);
	EXPECT_EQ(1, a.tv_sec);
	EXPECT_EQ(0, a.tv_nsec);

	timespec_from_msec(&a, 5001);
	EXPECT_EQ(5, a.tv_sec);
	EXPECT_EQ(1000000, a.tv_nsec);
	}

	TEST(timespec_test, timespec_from_proto)
	{
	struct timespec a;

	timespec_from_proto(&a, 0, 0, 0);
	EXPECT_EQ(0, a.tv_sec);
	EXPECT_EQ(0, a.tv_nsec);

	timespec_from_proto(&a, 0, 1234, 9999);
	EXPECT_EQ(1234, a.tv_sec);
	EXPECT_EQ(9999, a.tv_nsec);

	timespec_from_proto(&a, 0x1234, 0x5678, 1);
	EXPECT_EQ((time_t)0x0000123400005678LL, a.tv_sec);
	EXPECT_EQ(1, a.tv_nsec);
	}

	TEST(timespec_test, timespec_is_zero)
	{
	struct timespec zero = { 0 };
	struct timespec non_zero_sec = { 1, 0 };
	struct timespec non_zero_nsec = { 0, 1 };

	EXPECT_TRUE(timespec_is_zero(&zero));
	EXPECT_FALSE(timespec_is_zero(&non_zero_nsec));
	EXPECT_FALSE(timespec_is_zero(&non_zero_sec));
	}

	TEST(timespec_test, timespec_eq)
	{
	struct timespec a = { 2, 1 };
	struct timespec b = { -1, 2 };

	EXPECT_TRUE(timespec_eq(&a, &a));
	EXPECT_TRUE(timespec_eq(&b, &b));

	EXPECT_FALSE(timespec_eq(&a, &b));
	EXPECT_FALSE(timespec_eq(&b, &a));
	}

	TEST(timespec_test, timespec_get)
	{
	struct timespec a;
	struct timespec b;
	time_t t;
	timespec_get(&a, TIME_UTC);
	time(&t);
	timespec_get(&b, TIME_UTC);
	/* `t + 1` and `t - 1` are used intentionally for avoid flakes */
	EXPECT_LE(a.tv_sec, t + 1);
	EXPECT_LE(t - 1, b.tv_sec);
	}