Stubbing out a module

gistfile1.rb

# spec/spec_helper_lite.rb
def 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