public async void Calendars_AddEventReminder_SetsSingleReminderIfNone()
{
var calendarEvent = GetTestEvent();
var reminder = new CalendarEventReminder {
TimeBefore = TimeSpan.FromMinutes(42)
};
var calendar = await _service.CreateCalendarAsync(_calendarName);
await _service.AddOrUpdateEventAsync(calendar, calendarEvent);
await _service.AddEventReminderAsync(calendarEvent, reminder);
var eventFromId = await _service.GetEventByIdAsync(calendarEvent.ExternalID);
Assert.AreEqual(reminder, eventFromId.Reminders.Single());
}