public async Task url_is_in_expected_format()
{
await _pusher.GetAsync <object>("/channels");
#pragma warning disable 4014
_subPusherClient.Received().ExecuteGetAsync <object>(
#pragma warning restore 4014
Arg.Is <IPusherRestRequest>(
x => x.ResourceUri.StartsWith("/apps/" + _config.AppId + "/channels")
)
);
}