1 files changed, 44 insertions, 0 deletions
diff --git a/tests/libntp/calyearstart.c b/tests/libntp/calyearstart.c
new file mode 100644
index 0000000000000..b293c9339d976
--- /dev/null
+++ b/tests/libntp/calyearstart.c
@@ -0,0 +1,44 @@
+#include "config.h"
+
+#include "ntp_stdlib.h" //test fail without this include, for some reason
+#include "ntp_calendar.h"
+#include "unity.h"
+
+#include "test-libntp.h"
+
+
+void setUp()
+{
+    ntpcal_set_timefunc(timefunc);
+    settime(1970, 1, 1, 0, 0, 0);
+}
+
+void tearDown()
+{
+    ntpcal_set_timefunc(NULL);
+}
+
+
+void test_NoWrapInDateRange() {
+	const u_int32 input = 3486372600UL; // 2010-06-24 12:50:00.
+	const u_int32 expected = 3471292800UL; // 2010-01-01 00:00:00
+
+	TEST_ASSERT_EQUAL(expected, calyearstart(input, &nowtime));
+	TEST_ASSERT_EQUAL(expected, calyearstart(input, NULL));
+}
+
+void test_NoWrapInDateRangeLeapYear() {
+	const u_int32 input = 3549528000UL; // 2012-06-24 12:00:00
+	const u_int32 expected = 3534364800UL; // 2012-01-01 00:00:00
+
+	TEST_ASSERT_EQUAL(expected, calyearstart(input, &nowtime));
+	TEST_ASSERT_EQUAL(expected, calyearstart(input, NULL));
+}
+
+void test_WrapInDateRange() {
+	const u_int32 input = 19904UL; // 2036-02-07 12:00:00
+	const u_int32 expected = 4291747200UL; // 2036-01-01 00:00:00
+
+	TEST_ASSERT_EQUAL(expected, calyearstart(input, &nowtime));
+	TEST_ASSERT_EQUAL(expected, calyearstart(input, NULL));
+}