How to access custom webpart methods in Unittest.Tests solution

Hi Support,I have two solutions (i.e CMS and Unit.Tests). How can I access custom webpart methods from cms solution to Unit.Tests solution? NOTE : Here I don't have namespace for custom webparts.Is it possible to provide any sample code . for For both integrated test @ Automated test.also i need to test my ASCX file webpart code. with unit test.