Method: Cucumber::Glue::ProtoWorld.for

Defined in:
lib/cucumber/glue/proto_world.rb

.for(runtime, language) ⇒ Object

Dynamially generate the API module, closuring the dependencies



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# File 'lib/cucumber/glue/proto_world.rb', line 126

def self.for(runtime, language)
  Module.new do
    def self.extended(object)
      # wrap the dynamically generated module so that we can document the methods
      # for yardoc, which doesn't like define_method.
      object.extend(ProtoWorld)
    end

    # TODO: pass these in when building the module, instead of mutating them later
    # Extend the World with user-defined modules
    def add_modules!(world_modules, namespaced_world_modules)
      add_world_modules!(world_modules)
      add_namespaced_modules!(namespaced_world_modules)
    end

    define_method(:step) do |name, raw_multiline_arg = nil|
      location = Core::Ast::Location.of_caller
      runtime.invoke_dynamic_step(name, MultilineArgument.from(raw_multiline_arg, location))
    end

    define_method(:steps) do |steps_text|
      location = Core::Ast::Location.of_caller
      runtime.invoke_dynamic_steps(steps_text, language, location)
    end

    # rubocop:disable UnneededInterpolation
    define_method(:puts) do |*messages|
      # Even though they won't be output until later, converting the messages to
      # strings right away will protect them from modifications to their original
      # objects in the mean time
      messages.collect! { |message| "#{message}" }

      runtime.puts(*messages)
    end
    # rubocop:enable UnneededInterpolation

    define_method(:ask) do |question, timeout_seconds = 60|
      runtime.ask(question, timeout_seconds)
    end

    define_method(:embed) do |file, mime_type, label = 'Screenshot'|
      runtime.embed(file, mime_type, label)
    end

    # Prints the list of modules that are included in the World
    def inspect
      modules = [self.class]
      (class << self; self; end).instance_eval do
        modules += included_modules
      end
      modules << stringify_namespaced_modules
      format('#<%s:0x%x>', modules.join('+'), self.object_id)
    end

    private

    # @private
    def add_world_modules!(modules)
      modules.each do |world_module|
        extend(world_module)
      end
    end

    # @private
    def add_namespaced_modules!(modules)
      @__namespaced_modules = modules
      modules.each do |namespace, world_modules|
        world_modules.each do |world_module|
          variable_name = "@__#{namespace}_world"

          inner_world = if self.class.respond_to?(namespace)
                          instance_variable_get(variable_name)
                        else
                          Object.new
                        end
          instance_variable_set(variable_name,
                                inner_world.extend(world_module))
          self.class.send(:define_method, namespace) do
            instance_variable_get(variable_name)
          end
        end
      end
    end

    # @private
    def stringify_namespaced_modules
      @__namespaced_modules.map { |k, v| "#{v.join(',')} (as #{k})" }.join('+')
    end
  end
end