1 files changed, 75 insertions, 0 deletions
diff --git a/tests/libntp/hextolfp.c b/tests/libntp/hextolfp.c
new file mode 100644
index 000000000000..bb650a525a01
--- /dev/null
+++ b/tests/libntp/hextolfp.c
@@ -0,0 +1,75 @@
+#include "config.h"
+
+#include "ntp_stdlib.h"
+#include "ntp_calendar.h"
+
+#include "unity.h"
+#include "lfptest.h"
+
+void test_PositiveInteger(void);
+void test_NegativeInteger(void);
+void test_PositiveFraction(void);
+void test_NegativeFraction(void);
+void test_IllegalNumberOfInteger(void);
+void test_IllegalChar(void);
+
+
+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));
+}