NiCE interview questions

I have been contacted by recruiter and told them I need sponsorship. The recruiter came back to me later said the hiring manage like my CV and like me to finish a code test, which I finished the test as required. Then I have no respond, then I send email to the agency and they reply me: "Thanks for doing the test but unfortunately the client is not willing to sponsor at this stage, I will let you know if anything changes." Yes. I am really disappointed by the way they are responding not the result. I totally understand if they think my test result is not good enough. But why they are giving the test if they are not willing to sponsor anyway?