public async Task GetGreetings() { var greetings = await service.GetGreetingsAsync(DateTime.MinValue); Assert.IsNotNull(greetings); Assert.IsTrue(greetings.LastUpdated < DateTime.Now + TimeSpan.FromMinutes(1), $"LastUpdated: {greetings.LastUpdated}, Time: {DateTime.Now}"); Assert.IsTrue(greetings.LastUpdated > DateTime.MinValue); }