add test

test/rustint/core_test.clj

@@ -127,3 +127,9 @@
     (is (= (compatibles? 'char ['a]) true))
   )
 )
+
+(deftest dividir-test01
+  (testing "Test 01 dividir"
+    (is (= (dividir 12 3) 4))
+  )
+)