class Cucumber::Formatter::FailFast

def initialize(configuration)
  @previous_test_case = nil
  configuration.on_event :test_case_finished do |event|
    test_case, result = *event.attributes
    if test_case != @previous_test_case
      @previous_test_case = event.test_case
      Cucumber.wants_to_quit = true unless result.ok?(strict: configuration.strict)
    elsif result.passed?
      Cucumber.wants_to_quit = false
    end
  end
end