public void Update_validResponse_test()
{
var now = DateTime.Now;
var html = "<p>test</p>";
bannerService.CreateBanner(0, "<div>divvvv</div>");
var response = bannerController.Put(0, html);
Assert.Equal(0, response.Id);
Assert.Equal(html, response.Html);
Assert.True(response.Created.Value.Ticks - now.Ticks >= -tenMilisecondsTicks);
Assert.True(response.Modified.Value.Ticks - now.Ticks >= -tenMilisecondsTicks);
Assert.NotEqual(response.Created, response.Modified);
}