public async Task <IMqttServer> StartServerAsync(MqttServerOptionsBuilder options)
{
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
if (Server != null)
{
throw new InvalidOperationException("Server already started.");
}
Server = new TestServerWrapper(_mqttFactory.CreateMqttServer(ServerLogger), TestContext, this);
options.WithDefaultEndpointPort(ServerPort);
await Server.StartAsync(options.Build()).ConfigureAwait(false);
return(Server);
}