Add test for attr calls specifically

unittests/function_attributes.chai

@@ -2,7 +2,15 @@
 
 load_module("test_module")
 
-auto t0 = TestBaseType()
+class MyClass
+{
+  var func_member;
+
+  def MyClass() {}
+
+}
+
+auto t0 = MyClass();
 
 t0.func_member = fun(int i){ i * 3; };