diff --git a/x_ctypes/src/tests/tests.c b/x_ctypes/src/tests/tests.c
new file mode 100644
index 0000000..d92afa8
--- /dev/null
+++ b/x_ctypes/src/tests/tests.c
@@ -0,0 +1,160 @@
+#include <stdio.h>
+#include "x_ctypes.h"
+
+// printf Formating
+#define X_RED "\x1B[31m"
+#define X_GREEN "\x1B[32m"
+#define X_RST "\x1B[0m"
+
+// INSERT HEADERS FOR FUNCS
+
+// SET THE NUMBER OF TESTS
+#define NUM_TESTS 9
+
+
+
+
+// DUMMY TEST
+int fail(){
+	printf("%s... ", __func__);
+    return -1;
+}
+
+// DEFINE TESTS
+int test_x_isdigit_with_char_is_ascii_3(){
+	printf("%s... ", __func__);
+	char x = '3';
+
+	if ( x_isdigit(x) ){
+		return 0;
+	}
+
+	return -1;
+}
+
+int test_x_isdigit_with_char_is_ascii_l(){
+	printf("%s... ", __func__);
+	char x = 'l';
+
+	if ( !x_isdigit(x) ){
+		return 0;
+	}
+
+	return -1;
+}
+
+int test_x_isdigit_with_int_4(){
+	printf("%s... ", __func__);
+	char x = 4;
+
+	if ( x_isdigit(x) ){
+		return 0;
+	}
+
+	return -1;
+}
+
+int test_x_isdigit_with_ascii_pound(){
+	printf("%s... ", __func__);
+
+	char x = '#';
+
+	if ( !x_isdigit(x) ){
+		return 0;
+	}
+
+	return -1;
+}
+
+int test_x_isnumber_with_ascii_1234(){
+	printf("%s... ", __func__);
+
+	char *str = "1234";
+
+	if ( x_isnumber(str) ){
+		return 0;
+	}
+
+	return -1;
+}
+
+int test_x_isnumber_with_ascii_abcd(){
+	printf("%s... ", __func__);
+
+	char *str = "abcd";
+
+	if ( !x_isnumber(str) ){
+		return 0;
+	}
+
+	return -1;
+}
+
+int test_x_isnumber_with_ascii_6(){
+	printf("%s... ", __func__);
+
+	char *str = "6";
+
+	if ( x_isnumber(str) ){
+		return 0;
+	}
+
+	return -1;
+}
+
+int test_x_isnumber_with_ascii_b(){
+	printf("%s... ", __func__);
+
+	char *str = "b";
+
+	if ( !x_isnumber(str) ){
+		return 0;
+	}
+
+	return -1;
+}
+
+// END OF TEST DEFINITIONS
+
+void run_tests(int (**tests)()){
+    int i = 0;
+    int errors = 0;
+
+    for ( i = 0; i < NUM_TESTS; i++ ){
+        printf("Test #%d... ", i);
+        if ( tests[i]() == 0){
+            printf("%spassed%s\n", X_GREEN, X_RST);
+        }
+        else {
+            printf("%sfailed%s\n", X_RED, X_RST);
+            errors++;
+        }
+    }
+
+    printf("Tests completed with %s%d passed%s", X_GREEN, NUM_TESTS - errors, X_RST);
+    printf(" and %s%d failed%s\n", X_RED, errors, X_RST);
+}
+
+int main(){
+    int (*tests[NUM_TESTS])();
+
+	// PASS TESTS INTO ARRAY
+    tests[0] = fail;
+    tests[1] = test_x_isdigit_with_char_is_ascii_3;
+    tests[2] = test_x_isdigit_with_char_is_ascii_l;
+    tests[3] = test_x_isdigit_with_int_4;
+    tests[4] = test_x_isdigit_with_ascii_pound;
+    tests[5] = test_x_isnumber_with_ascii_1234;
+    tests[6] = test_x_isnumber_with_ascii_abcd;
+    tests[7] = test_x_isnumber_with_ascii_6;
+    tests[8] = test_x_isnumber_with_ascii_b;
+
+
+	// END OF PASSING TESTS
+
+	// RUN TESTS
+	run_tests(tests);
+
+    return 0;
+}
+