Reading Chat in LUA

[Elliss11]

Hi.. i´m not a developer but I want to convert an existing plugin for own use.
can someone tell me how I have to write it that the counter will only count if a certain text found ?

for example :
if "test" match in Chat(PlayerCounter) then Count+1


ChatMonitor = Turbine.Chat;
ChatMonitor.Received = function(f, args)
local msg = args.Message;
if(args.ChatType == Turbine.ChatType.PlayerCombat) then
count=Count+1
do_update()
end
end


thanks for helping
Elliss11