This Lua module is a metamodule: it is not designed to be invoked directly from wikitext: it is to be imported by other Lua modules.
First, import the module as follows:
local treeView = require('Module:Sandbox/Luis150902/Test')
Second, invoke the treeView function of the module with the object to render and (optionally) an option table as the second argument. Wikitext of the table will be returned.