asp.net mvc unit test mock issue
var roles = Roles.GetAllRoles();

LogOnTest()(Error message is "The Role Manager feature has not been enabled.")

[TestMethod]
public void LogOnTest()
{
    var target = new AccountController();
    var membershipMock = MockRepository.GenerateMock<AccountMembershipService>();
    var formsMock = MockRepository.GenerateMock<IFormsAuthenticationService>();

    target.FormsService = formsMock;
    target.MembershipService = membershipMock;

    var model = new LogonModel() { USERNAME= "aa", Password = "aa"};
    string returnUrl = null;
    bool isLoginSuccess = true;
    var actual = target.LogOnFromUser(model);
    if (actual == null)
        Assert.Fail("should have redirected");
 }

public ActionResult LogOn(LogonModel model)
        {
if(MembershipService.ValidateUser(model.UsernName, model.Password))
                {
                    FormsService.SignIn(model.UsernName, true);
                                        var roles = Roles.GetAllRoles(); //Roles got failed here
return RedirectToAction("Index", "Event");
}
else
{
ModelState.AddModelError("", "The user name or password provided is incorrect.");

            return View("LogOn", model);
}

<system.web>
      <roleManager enabled="true"
             defaultProvider="AspNetWindowsTokenRoleProvider" />
    </system.web>