1 files changed, 37 insertions, 0 deletions
diff --git a/tests/libntp/ymd2yd.c b/tests/libntp/ymd2yd.c
new file mode 100644
index 000000000000..ccb7fb91f962
--- /dev/null
+++ b/tests/libntp/ymd2yd.c
@@ -0,0 +1,37 @@
+#include "config.h"
+
+#include "ntp_stdlib.h"
+
+#include "unity.h"
+
+void test_NonLeapYearFebruary(void);
+void test_NonLeapYearJune(void);
+void test_LeapYearFebruary(void);
+void test_LeapYearDecember(void);
+
+
+void
+test_NonLeapYearFebruary(void) {
+	TEST_ASSERT_EQUAL(31 + 20, ymd2yd(2010, 2, 20)); //2010-02-20
+}
+
+
+void
+test_NonLeapYearJune(void) {
+	int expected = 31+28+31+30+31+18; // 18 June non-leap year
+	TEST_ASSERT_EQUAL(expected, ymd2yd(2011, 6, 18));
+}
+
+
+void
+test_LeapYearFebruary(void) {
+	TEST_ASSERT_EQUAL(31 + 20, ymd2yd(2012, 2, 20)); //2012-02-20 (leap year)
+}
+
+
+void
+test_LeapYearDecember(void) {
+	// 2012-12-31
+	int expected = 31+29+31+30+31+30+31+31+30+31+30+31;
+	TEST_ASSERT_EQUAL(expected, ymd2yd(2012, 12, 31));
+}