A module that allows you to conditionally define a module. Useful for isolated testing, when you just need something to stub without requiring the actual class or module in the test.

conditionally_define.rb

class ConditionallyDefine
  def self.stub_module(full_name)
    full_name.to_s.split(/::/).inject(Object) do |context, name|
      begin
        context.const_get(name)
      rescue NameError 
        context.const_set(name, Module.new)
      end
    end
  end
end