1 files changed, 63 insertions, 0 deletions
diff --git a/contrib/ntp/tests/libntp/hextolfp.c b/contrib/ntp/tests/libntp/hextolfp.c
new file mode 100644
index 0000000000000..a2f548f566448
--- /dev/null
+++ b/contrib/ntp/tests/libntp/hextolfp.c
@@ -0,0 +1,63 @@
+#include "config.h"
+
+#include "ntp_stdlib.h"
+#include "ntp_calendar.h"
+
+#include "unity.h"
+#include "lfptest.h"
+
+
+void test_PositiveInteger(void) {
+	const char *str = "00001000.00000000";
+	l_fp actual;
+
+	l_fp expected = {4096, 0}; // 16^3, no fraction part.
+
+	TEST_ASSERT_TRUE(hextolfp(str, &actual));
+	TEST_ASSERT_TRUE(IsEqual(expected, actual));
+}
+
+void test_NegativeInteger(void) {
+	const char *str = "ffffffff.00000000"; // -1 decimal
+	l_fp actual;
+
+	l_fp expected = {-1, 0};
+
+	TEST_ASSERT_TRUE(hextolfp(str, &actual));
+	TEST_ASSERT_TRUE(IsEqual(expected, actual));
+}
+
+void test_PositiveFraction(void) {
+	const char *str = "00002000.80000000"; // 8196.5 decimal
+	l_fp actual;
+
+	l_fp expected = {8192, HALF};
+
+	TEST_ASSERT_TRUE(hextolfp(str, &actual));
+	TEST_ASSERT_TRUE(IsEqual(expected, actual));
+}
+
+void test_NegativeFraction(void) {
+	const char *str = "ffffffff.40000000"; // -1 + 0.25 decimal
+	l_fp actual;
+
+	l_fp expected = {-1, QUARTER}; //-1 + 0.25
+
+	TEST_ASSERT_TRUE(hextolfp(str, &actual));
+	TEST_ASSERT_TRUE(IsEqual(expected, actual));
+}
+
+void test_IllegalNumberOfInteger(void) {
+	const char *str = "1000000.00000000"; // Missing one digit in integral part.
+	l_fp actual;
+
+	TEST_ASSERT_FALSE(hextolfp(str, &actual));
+}
+
+void test_IllegalChar(void) {
+	const char *str = "10000000.0000h000"; // Illegal character h.
+	l_fp actual;
+
+	TEST_ASSERT_FALSE(hextolfp(str, &actual));
+}
+