82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
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// SPDX-License-Identifier: LGPL-2.1+
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#include <kunit/test.h>
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#include <linux/rtc.h>
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/*
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* Advance a date by one day.
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*/
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static void advance_date(int *year, int *month, int *mday, int *yday)
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{
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if (*mday != rtc_month_days(*month - 1, *year)) {
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++*mday;
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++*yday;
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return;
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}
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*mday = 1;
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if (*month != 12) {
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++*month;
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++*yday;
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return;
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}
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*month = 1;
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*yday = 1;
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++*year;
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}
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/*
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* Checks every day in a 160000 years interval starting on 1970-01-01
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* against the expected result.
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*/
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static void rtc_time64_to_tm_test_date_range(struct kunit *test)
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{
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/*
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* 160000 years = (160000 / 400) * 400 years
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* = (160000 / 400) * 146097 days
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* = (160000 / 400) * 146097 * 86400 seconds
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*/
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time64_t total_secs = ((time64_t) 160000) / 400 * 146097 * 86400;
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int year = 1970;
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int month = 1;
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int mday = 1;
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int yday = 1;
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struct rtc_time result;
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time64_t secs;
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s64 days;
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for (secs = 0; secs <= total_secs; secs += 86400) {
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rtc_time64_to_tm(secs, &result);
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days = div_s64(secs, 86400);
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#define FAIL_MSG "%d/%02d/%02d (%2d) : %ld", \
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year, month, mday, yday, days
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KUNIT_ASSERT_EQ_MSG(test, year - 1900, result.tm_year, FAIL_MSG);
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KUNIT_ASSERT_EQ_MSG(test, month - 1, result.tm_mon, FAIL_MSG);
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KUNIT_ASSERT_EQ_MSG(test, mday, result.tm_mday, FAIL_MSG);
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KUNIT_ASSERT_EQ_MSG(test, yday, result.tm_yday, FAIL_MSG);
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advance_date(&year, &month, &mday, &yday);
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}
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}
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static struct kunit_case rtc_lib_test_cases[] = {
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KUNIT_CASE(rtc_time64_to_tm_test_date_range),
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{}
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};
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static struct kunit_suite rtc_lib_test_suite = {
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.name = "rtc_lib_test_cases",
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.test_cases = rtc_lib_test_cases,
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};
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kunit_test_suite(rtc_lib_test_suite);
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MODULE_LICENSE("GPL");
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