protected async Task MissAsync(string email, string name, Image expected = null)
{
_inner.ClearReceivedCalls();
var actual = await _cache.GetAvatarAsync(email, name, _size);
_ = _inner.Received(1).GetAvatarAsync(email, name, _size);
if (expected is not null)
{
Assert.AreSame(expected, actual);
}
}