1 files changed, 47 insertions, 0 deletions
diff --git a/tests/libntp/hextoint.c b/tests/libntp/hextoint.c
new file mode 100644
index 0000000..e9f0d39
--- /dev/null
+++ b/tests/libntp/hextoint.c
@@ -0,0 +1,47 @@
+#include "config.h"
+
+#include "ntp_stdlib.h"
+#include "ntp_calendar.h"
+#include "ntp_fp.h"
+
+#include "unity.h"
+
+
+void test_SingleDigit(void) {
+        const char *str = "a"; // 10 decimal
+        u_long actual;
+
+        TEST_ASSERT_TRUE(hextoint(str, &actual));
+        TEST_ASSERT_EQUAL(10, actual);
+}
+
+void test_MultipleDigits(void) {
+        const char *str = "8F3"; // 2291 decimal
+        u_long actual;
+
+        TEST_ASSERT_TRUE(hextoint(str, &actual));
+        TEST_ASSERT_EQUAL(2291, actual);
+}
+
+void test_MaxUnsigned(void) {
+        const char *str = "ffffffff"; // 4294967295 decimal
+        u_long actual;
+
+        TEST_ASSERT_TRUE(hextoint(str, &actual));
+        TEST_ASSERT_EQUAL(4294967295UL, actual);
+}
+
+void test_Overflow(void) {
+        const char *str = "100000000"; // Overflow by 1
+        u_long actual;
+
+        TEST_ASSERT_FALSE(hextoint(str, &actual));
+}
+
+void test_IllegalChar(void) {
+        const char *str = "5gb"; // Illegal character g
+        u_long actual;
+
+        TEST_ASSERT_FALSE(hextoint(str, &actual));
+}
+