rtc: test: Also test time and wday outcome of rtc_time64_to_tm()

To cover calculation of the time and wday in the rtc kunit test also check
tm_hour, tm_min, tm_sec and tm_wday of the rtc_time calculated by
rtc_time64_to_tm().

There are no surprises, the two tests making use of
rtc_time64_to_tm_test_date_range() continue to succeed.

Signed-off-by: Uwe Kleine-König <[email protected]>
Signed-off-by: Alexandre Mergnat <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexandre Belloni <[email protected]>

Author: ukleinek

drivers/rtc/lib_test.c

@@ -6,8 +6,10 @@
 /*
  * Advance a date by one day.
  */
-static void advance_date(int *year, int *month, int *mday, int *yday)
+static void advance_date(int *year, int *month, int *mday, int *yday, int *wday)
 {
+	*wday = (*wday + 1) % 7;
+
 	if (*mday != rtc_month_days(*month - 1, *year)) {
 		++*mday;
 		++*yday;
@@ -43,23 +45,29 @@ static void rtc_time64_to_tm_test_date_range(struct kunit *test, int years)
 	int month	= 1;
 	int mday	= 1;
 	int yday	= 1;
+	int wday	= 4; /* Jan 1st 1970 was a Thursday */
 
 	struct rtc_time result;
 	time64_t secs;
+	const time64_t sec_offset = ((1 * 60) + 2) * 60 + 3;
 
 	for (secs = 0; secs <= total_secs; secs += 86400) {
 
-		rtc_time64_to_tm(secs, &result);
+		rtc_time64_to_tm(secs + sec_offset, &result);
 
-		#define FAIL_MSG "%d/%02d/%02d (%2d) : %lld", \
-			year, month, mday, yday, secs
+		#define FAIL_MSG "%d/%02d/%02d (%2d, %d) : %lld", \
+			year, month, mday, yday, wday, secs + sec_offset
 
 		KUNIT_ASSERT_EQ_MSG(test, year - 1900, result.tm_year, FAIL_MSG);
 		KUNIT_ASSERT_EQ_MSG(test, month - 1, result.tm_mon, FAIL_MSG);
 		KUNIT_ASSERT_EQ_MSG(test, mday, result.tm_mday, FAIL_MSG);
 		KUNIT_ASSERT_EQ_MSG(test, yday, result.tm_yday, FAIL_MSG);
+		KUNIT_ASSERT_EQ_MSG(test, 1, result.tm_hour, FAIL_MSG);
+		KUNIT_ASSERT_EQ_MSG(test, 2, result.tm_min, FAIL_MSG);
+		KUNIT_ASSERT_EQ_MSG(test, 3, result.tm_sec, FAIL_MSG);
+		KUNIT_ASSERT_EQ_MSG(test, wday, result.tm_wday, FAIL_MSG);
 
-		advance_date(&year, &month, &mday, &yday);
+		advance_date(&year, &month, &mday, &yday, &wday);
 	}
 }