将可选的表参数传递给黄瓜步骤（红宝石）

Question

I have a step that can be like this:

Then  I 'eat' all food except
   | Bread |

Then  I 'drink' all food except
   | Bread |
   | Milk  |

Then  I 'eat' all food

I decided to put some of the arguments into the table, because otherwise it may be hard to read it.

Step definition in Ruby is:

Then(/^I '(eat|drink)' all food(?: except)?$/) do |action, exceptions|
  exceptions = exceptions.raw.flatten.map(&:strip) unless exceptions.nil?

  action == 'eat' ? method1(exceptions: exceptions) : method2(exceptions: exceptions)

It works fine, but not for the case when I don't pass the table argument ("Then I 'eat' all food"). Is it possible to make a table argument optional?

Answer 1

I'm not sure if it will work in cucumber, but as it's just a ruby block you can try to use param with splat. A single param will hold the whole parameter list then:

Then(/^I '(eat|drink)' all food(?: except)?$/) do |*params|
   # params is an array
   action = params[0]
   exceptions = params[1] # may be nil
   #...
end

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