public void UserListViewTest()
        {
            var umMock = GetUserManagerMock();
            var rmMock = GetRoleManagerMock();

            var rolesController = new RolesController(rmMock.Object, umMock.Object);

            umMock.Setup(item => item.Users)
            .Returns(TestUsers.AsQueryable());
            var result = rolesController.UserList();

            Assert.NotNull(result);
            Assert.IsAssignableFrom <ViewResult>(result);
            var expected = TestUsers.ToList <User>().ToString();
            var actual   = rolesController.ViewData.Model.ToString();

            Assert.Equal(expected, actual);
        }