增加测试函数

test

@@ -36,6 +36,18 @@ end module
 module: MainModule
     import: CommonTasks, MathUtils, StringUtils, BuiltinUtils
 
+
+    function: test
+        parameter:
+            declare first_str: string
+            declare second_str: string
+        return_type: string
+        body:
+            return first_str + second_str
+        end body
+    end function
+
+
     function: main
         parameter:
             args: string