public class AnalyticsServicesShould
{
    [Fact]
    public void ReturnSessionCount()
    {
      var service = new AnalyticsServices();
      var sut = service.GetCountAndSave();
      if(DateTime.Today.DayOfWeek == DayOfWeek.Friday){
          Assert.True(sut > 0);
      }else{
      Assert.True(sut == 0);
      }
    }
}

public class AnalyticsService{

  public int GetCountAndSave(){
    var sessions = GoogleService.GetSessions();
    var saveCount = 0;
    if (DateTime.Today.DayOfWeek == DayOfWeek.Friday)
    {
        saveCount = AddToData(sessions);
    }
    else
    {
        Console.WriteLine("Not Today!");
    }
    return saveCount;
  }
}