public async Task Chat_PostScheduled()
 {
     var currentEpoch = Epoch.For(DateTime.Now.AddSeconds(60));
     var response     = await Utility.AssertWebApi(c => c.Chat.ScheduledMessages.Post(new ScheduledMessageRequest
     {
         Blocks = new List <IMessageBlock> {
             new Section {
                 Text = new PlainText("stuff")
             }
         },
         PostAt = currentEpoch
     }), "chat.scheduleMessage",
                                                   jobject =>
     {
         Assert.NotNull(jobject.Value <JArray>("blocks"));
         Assert.Equal(currentEpoch, jobject.Value <long>("post_at"));
     });
 }