vendor/gems/rspec-1.1.2/lib/spec/story/step.rb

   1 module Spec
   2   module Story
   3     class Step
   4       PARAM_PATTERN = /(\$\w*)/
   5       PARAM_OR_GROUP_PATTERN = /(\$\w*)|\(.*?\)/
   6
   7       attr_reader :name
   8       def initialize(name, &block)
   9         @name = name
  10         assign_expression(name)
  11         init_module(name, &block)
  12       end
  13
  14       def perform(instance, *args)
  15         instance.extend(@mod)
  16         instance.__send__(sanitize(@name), *args)
  17       end
  18
  19       def init_module(name, &block)
  20         sanitized_name = sanitize(name)
  21         @mod = Module.new do
  22           define_method(sanitized_name, &block)
  23         end
  24       end
  25
  26       def sanitize(a_string_or_regexp)
  27         return a_string_or_regexp.source if Regexp == a_string_or_regexp
  28         a_string_or_regexp.to_s
  29       end
  30
  31
  32       def matches?(name)
  33         !(matches = name.match(@expression)).nil?
  34       end
  35
  36       def parse_args(name)
  37         name.match(@expression)[1..-1]
  38       end
  39
  40       private
  41
  42         def assign_expression(name)
  43           expression = name.dup
  44           if String === expression
  45             expression.gsub! '(', '\('
  46             expression.gsub! ')', '\)'
  47             while expression =~ PARAM_PATTERN
  48               expression.gsub!($1, "(.*?)")
  49             end
  50           end
  51           @expression = Regexp.new("^#{expression}$")
  52         end
  53
  54     end
  55   end
  56 end