finish tests for strlen and makefile works

test.c

@@ -0,0 +1,45 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+#define OK "\033[32mOK\n\033[0m"
+#define KO "\033[31mKO\n\033[0m"
+
+#define FNC_TEST(title, condition)\
+	printf(title":\n");\
+	if(test_strlen())\
+		printf("RESULT: "OK);\
+	else\
+		printf(" RESULT: "KO);
+
+#define TEST(title, condition) \
+	printf("%s: ", title);\
+	if(condition)\
+	{\
+		printf(OK);\
+		passed++;\
+	}\
+	else \
+		printf(KO);
+
+size_t ft_strlen(char *str);
+
+int test_strlen(void)
+{
+	int nb_tests;
+	int passed;
+
+	nb_tests = 3;
+	passed = 0;
+	
+	TEST("normal string", ft_strlen("hello") == 5);
+	TEST("empty string", ft_strlen("") == 0);
+	TEST("null pointer", ft_strlen(NULL) == 0);
+
+	return(nb_tests == passed);
+}
+
+int main(void)
+{
+	FNC_TEST("ft_strlen", test_strlen());
+	printf("\n\n");
+}