================================
Single rule with single scenario
================================

Feature: This is the name of a feature

  Rule: This a rule

    Scenario: This is the title of a scenario
      Given this is a given step
      When this is a when step
      Then this is a then step

---

(feature
  (feature_keyword)
  (title)
  (rules
    (rule
      (rule_keyword)
      (title)
    
      (scenarios
        (scenario
          (scenario_keyword)
          (title)
          (steps
            (given_steps
              (given_step
                (given_keyword)
                (step_definition)
              )
            )
            (when_step
              (when_keyword)
              (step_definition)
            )
            (then_steps
              (then_step
                (then_keyword)
                (step_definition)
              )
            )
          )
        )
      )
    )
  )
)