rails/actionpack/test/controller/url_for_test.rb

gistfile1.rb

def test_without_protocol
  add_host!
  assert_equal('//www.basecamphq.com/c/a/i',
    W.new.url_for(:controller => 'c', :action => 'a', :id => 'i', :protocol => '//')
  )
  assert_equal('//www.basecamphq.com/c/a/i',
    W.new.url_for(:controller => 'c', :action => 'a', :id => 'i', :protocol => false)
  )
end