public void ShouldGroupGeneratedTimeSeriesByDate() { var userEvents = new[] { new UserEvent {At = new DateTime(2013, 07, 17), Feature = "Moose", Type = "tick"}, new UserEvent {At = new DateTime(2013, 07, 17), Feature = "Moose", Type = "tick"}, new UserEvent {At = new DateTime(2013, 07, 18), Feature = "Moose", Type = "tick"} }; var results = new GenerateTimeSeries().Generate(userEvents); Assert.Equal(2, results.Count()); }