add a lua evalbot to the tests

test/luabot.lua

@@ -0,0 +1,42 @@
+#!/usr/bin/env lua
+
+local irc = require 'irc'
+irc.DEBUG = true
+
+local nick = "luabot"
+local pre_code = [[
+io = nil
+os = nil
+loadfile = nil
+dofile = nil
+package = nil
+require = nil
+module = nil
+debug = nil
+]]
+
+irc.register_callback("connect", function()
+    irc.join("#doytest")
+end)
+
+irc.register_callback("channel_msg", function(channel, from, message)
+    local for_me, code = message:match("^(" .. nick .. ". )(.*)")
+    if for_me then
+        code = code:gsub("^=", "return ")
+        local fn, err = loadstring(pre_code .. code)
+        if not fn then
+            irc.say(channel.name, from .. ": Error loading code: " .. err)
+            return
+        else
+            local result = {pcall(fn)}
+            local success = table.remove(result, 1)
+            if not success then
+                irc.say(channel.name, from .. ": Error running code: " .. result[1])
+            else
+                irc.say(channel.name, from .. ": " .. table.concat(result, ", "))
+            end
+        end
+    end
+end)
+
+irc.connect{network = "irc.freenode.net", nick = nick}