asp.net mvc 4 - Unit Testing to multiple RedirectToAction -

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i'm new in of unit testing, , need code. it's working mvc 4.0 have call database, , don't understand how can start create unit testing if need open connection, hope can me.

this code:

[httppost]     public actionresult add(user user, ienumerable<int> groups)     {         httpcookie cookie = request.cookies.get(securitymanager.cookiename);         if (cookie != null)         {             if (securitymanager.haspermission(int.parse(cookie.values.get("id")),(int)permissionenum.adduser))             {                 list<group> gs = new list<group>();                 if (groups != null)                 {                     foreach (int g in groups)                     {                         group gr = groupmanager.getgroup(g);                         gs.add(gr);                     }                 }                  user.groups = gs;                  if (usermanager.adduseremployee(user))                 {                     return redirecttoaction("index");                 }                 else                 {                     viewbag.groups = new multiselectlist(                         groupmanager.getmygroups(int.parse(cookie.values.get("id"))),"id", "name", groups);                     modelstate.addmodelerror("error", "error saving user.");                     return view(user);                 }             }             else             {                 return redirecttoaction("nopermission", "home");             }          }         else         {             return redirecttoaction("logout", "home");         }      }

how can test redirecttoaction because have more one?

to test redirecttoaction results, cast result redirecttorouteresult follows: 

// test case 1:  redirecttorouteresult result = controller.adduser(user, groups) redirecttorouteresult;  assert.equal("nopermission", result.routevalues["action"]); assert.equal("home", result.routevalues["controller"]);  // test case 2: redirecttorouteresult result = controller.adduser(user, groups) redirecttorouteresult;  assert.equal("logout", result.routevalues["action"]); assert.equal("home", result.routevalues["controller"]);

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