class Cucumber::Ast::Scenario

def accept(visitor)
  return if Cucumber.wants_to_quit
  visitor.visit_comment(@comment) unless @comment.empty?
  visitor.visit_tags(@tags)
  visitor.visit_scenario_name(@keyword, name, file_colon_line, source_indent(first_line_length))
  skip_invoke! if @background.failed?
  with_visitor(visitor) do
    visitor.execute(self, skip_hooks?)
  end
  @executed = true
end

def exception
  @exception || steps.exception
end

def fail!(exception)
  @exception = exception
  @current_visitor.visit_exception(@exception, :failed)
end

def failed?
  steps.failed? || !!@exception
end

def initialize(language, location, background, comment, tags, feature_tags, keyword, title, description, raw_steps)
  @language, @location, @background, @comment, @tags, @feature_tags, @keyword, @title, @description, @raw_steps = language, location, background, comment, tags, feature_tags, keyword, title, description, raw_steps
  @exception = @executed = nil
  attach_steps(@raw_steps)
end

def passed?
  !failed?
end

def skip_hooks?
  @background.failed? || @executed
end

def skip_invoke!
  steps.skip_invoke!
end

def status
  return :failed if @exception
  steps.status
end

def step_invocations
  @raw_steps.map{|step| step.step_invocation}
end

def steps
  @steps ||= @background.step_collection(step_invocations)
end

def to_sexp
  sexp = [:scenario, line, @keyword, name]
  comment = @comment.to_sexp
  sexp += [comment] if comment
  tags = @tags.to_sexp
  sexp += tags if tags.any?
  sexp += steps.to_sexp if steps.any?
  sexp
end

def to_units(background)
  [Unit.new(background.step_invocations + step_invocations)]
end

def with_visitor(visitor)
  @current_visitor = visitor
  yield
  @current_visitor = nil
end