test lua file for PR

gistfile1.lua

dt = require "darktable"
debug = require "debug"
--introspect = require "introspection"
--introspect.debug = true
--introspect.introspect(dt)
--introspect.introspect(debug.getregistry(),"registry")
dt = require("darktable")
print("normal printf")
for k,v in pairs(dt) do
	print(k.." : "..tostring(v))
end
dt.print("lua popup");
dt.print_error("lua error printf");

print("configuration : ")
for k,v in pairs(dt.configuration) do
	print(k.." : "..tostring(v))
end

dt.preferences.register("test","test_int","integer","int pref","int pref tooltip",1,0,5)
dt.preferences.register("test","test_bool","bool","bool pref","bool pref tooltip",true)
dt.preferences.register("test","test_string","string","string pref","string pref tooltip","default string")

print(dt.preferences.read("test","test_int","integer"))
print(dt.preferences.read("test","test_bool","bool"))
print(dt.preferences.read("test","test_string","string"))
print("")

dt.preferences.write("test","test_int","integer",2)
dt.preferences.write("test","test_bool","bool",false)
dt.preferences.write("test","test_string","string","changed string")

print(dt.preferences.read("test","test_int","integer"))
print(dt.preferences.read("test","test_bool","bool"))
print(dt.preferences.read("test","test_string","string"))
print("")