public async Task TryDeleteNonExistingEntity ()
{
var v = await _calDavDataAccess.CreateEntity (
SerializeCalendar (
CreateEntity (1)), Guid.NewGuid().ToString());
Assert.That (
await _calDavDataAccess.TryDeleteEntity (v.Id, v.Version),
Is.True);
Assert.That (
await _calDavDataAccess.TryDeleteEntity (v.Id, @"""bla"""),
Is.False);
}