tangzhen · July 10, 2016 01:18
diff --git a/optional.feature b/optional.feature
 Feature: Optional parameter

  Scenario: Use an optional parameter
    When I execute a step
    When I execute a step with the optional parameter whatever
diff --git a/optional_steps.rb b/optional_steps.rb
 When /^I execute a step(?: with the optional parameter (.*))?$/ do |param|
  param ||= "default value"
  puts 'using ' + param
 end

 
diff --git a/output b/output
 Feature: Optional parameter

  Scenario: Use an optional parameter
    When I execute a step
      using default value
    When I execute a step with the optional parameter foobar
      using foobar

 1 scenario (1 passed)
 2 steps (2 passed)
 0m0.047s
	Feature: Optional parameter

	Scenario: Use an optional parameter
	When I execute a step
	When I execute a step with the optional parameter whatever
	When /^I execute a step(?: with the optional parameter (.*))?$/ do \|param\|
	param \|\|= "default value"
	puts 'using ' + param
	end