top_level_describe.rb

# frozen_string_literal: true

module RuboCop
  module Cop
    module RSpec
      # Helper methods for top level describe cops
      module TopLevelDescribe
        extend NodePattern::Macros

        def on_send(node)
          return unless respond_to?(:on_top_level_describe)
          return unless top_level_describe?(node)

          on_top_level_describe(node, node.arguments)
        end

        private

        def top_level_describe?(node)
          return false unless node.method_name == :describe

          top_level_nodes.include?(node)
        end

        def top_level_nodes
          nodes = describe_statement_children(root_node)
          # If we have no top level describe statements, we need to check any
          # blocks on the top level (e.g. after a require).
          if nodes.empty?
            nodes = root_node.each_child_node(:block).flat_map do |child|
              describe_statement_children(child)
            end
          end

          nodes
        end

        def root_node
          processed_source.ast
        end

        def single_top_level_describe?
          top_level_nodes.one?
        end

        def describe_statement_children(node)
          node.each_child_node(:send).select do |element|
            element.method_name == :describe
          end
        end
      end
    end
  end
end