Minetest-WorldEditAdditions/worldeditadditions/lib/normalize_test.lua

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-- Metatable for tests
local metatable = {
	__call = function(self,name, ...)
		return xpcall(self.func, debug.traceback, name, ...)
	end,
	help = function(self)
		return "Params: " .. self.params .. "\n" .. self.description
	end
}
metatable.__index = metatable

local normalize_test = function(test_name, def)
	---
	-- 1: Validation
	---
	if type(test_name) ~= "string" then
		error("The test name is not a string.")
	end
	if type(def) ~= "table" then
		error("The test definition is not a table.")
	end
	if type(def.description) ~= "string" then
		error("The test description is not a string.")
	end
	if type(def.params) ~= "string" or #def.params == 0 then
		error("The test params param is not valid.")
	end
	if type(def.func) ~= "function" then
		error("The test function is not a function.")
	end
	
	---
	-- 2: Normalisation
	---
	setmetatable(def, metatable)
	
	return test_name, def
end

return normalize_test