SOAPUI WSDL Interpretation

Hi, I was encountering an issue wherein even if I inputted an incorrect or incomplete WSDL URL, the service still send a request...
would someone know how SOAPUI interpret a WSDL...

example:
http://<host>:<port>/mypack/myApp/myService/GetEmployees?WSDL
The above will execute properly. however, when I entered below URL, it send a request also.
http://<host>:<port>/mypack/myApp/myService/

I was hoping that when the URL in incomplete, it will throw a fault exception or something because the URL is invalid...

Can someone help me understand... '


Thanks...