add test

test/rustint/core_test.clj

@@ -85,3 +85,9 @@
     (is (= (compatibles? 'f64 5.0) true))
   )
 )
+
+(deftest compatibles-test05
+  (testing "Test 05 compatibles?"
+    (is (= (compatibles? 'String "Hola") true))
+  )
+)