JUnit test case for controller with request maping having model attribute

Hello,

I am writing a JUnit test case for one of my controller and my request mapping signature follows:

@requestMapping(value="/app/request")
public String getData(Model modal, @ModelAttribute("form") DataForm form, HttpServletRequest req){}

Now from my JUnit I am not able to pass data for my form, DataFrom.
From my test method I tried to set to request's Attribute and Parameters; but none worked. I am getting the form as null.

Please, Any help here?