public void Pin_Unpin_ChatMessage_Returns()
{
var channelMessage = _b.SendMessage(_testChannelPost.Chat, "pinned message");
var privateMessage = _b.SendMessage(_testMessage.Chat, "pinning this should fail");
Assert.That(_b.PinChatMessage(channelMessage));
Assert.That(_b.UnpinChatMessage(channelMessage.Chat));
//reaction on no present message
Assert.Throws <WebException>(() => _b.UnpinChatMessage(channelMessage.Chat));
Assert.Throws <WebException>(() => _b.PinChatMessage(privateMessage));
//reaction on unpinnin in private chat
Assert.Throws <WebException>(() => _b.UnpinChatMessage(privateMessage.Chat));
}