public void AddingDuplicateRoleThrows()
 {
     string role = Guid.NewGuid().ToString();
     var target = new AuthenticationModel();
     target.AddRole(role);
     target.AddRole(role);
 }
        public void CanAddRole()
        {
            string role = Guid.NewGuid().ToString();
            var target = new AuthenticationModel();
            target.AddRole(role);

            Assert.IsTrue(target.RoleExists(role));
            Assert.AreEqual(1, target.Roles.Count());
            Assert.AreEqual(role, target.Roles.Single().Name);
        }