module ATP module Processors # Modifies the AST by performing some basic clean up, mainly to sanitize # user input. For example it will ensure that all IDs are symbols, and that # all names are lower-cased strings. class PreCleaner < Processor def initialize @group_ids = [] end # Make all IDs lower cased symbols def on_id(node) id = node.to_a[0] node.updated(nil, [clean(id)]) end # Make all ID references use the lower case symbols def on_test_executed(node) children = node.children.dup children[0] = clean(children[0]) node.updated(nil, process_all(children)) end alias_method :on_test_result, :on_test_executed def on_group(node) if id = node.children.find { |n| n.type == :id } @group_ids << process(id).value else @group_ids << nil end group = node.updated(nil, process_all(node.children)) @group_ids.pop group end def on_test(node) # Remove IDs nodes from test nodes if they refer to the ID of a parent group if @group_ids.last children = node.children.reject do |n| if n.type == :id @group_ids.last == process(n).value end end else children = node.children end node.updated(nil, process_all(children)) end def clean(id) if id.is_a?(Array) id.map { |i| clean(i) } else id.to_s.downcase.to_sym end end end end end