Fix trouble using :subdomain in development environment when using numeric addresses.

    See-also pull request #3561 from 3-1-stable

    Otherwise the following occurs:

    TypeError: can't convert nil into String
        /Users/bfolkens/dev/bfolkens-rails-core/actionpack/lib/action_dispatch/http/url.rb:75:in host_or_subdomain_and_domain'
        /Users/bfolkens/dev/bfolkens-rails-core/actionpack/lib/action_dispatch/http/url.rb:37:in url_for'
        /Users/bfolkens/dev/bfolkens-rails-core/actionpack/lib/action_dispatch/routing/url_for.rb:147:in test_subdomain_may_be_accepted_with_numeric_host'
        /Users/bfolkens/dev/bfolkens-rails-core/activesupport/lib/active_support/testing/setup_and_teardown.rb:67:in run'
        /Users/bfolkens/dev/bfolkens-rails-core/activesupport/lib/active_support/callbacks.rb:426:in send'
        /Users/bfolkens/dev/bfolkens-rails-core/activesupport/lib/active_support/callbacks.rb:81:in run'

1 files changed, 11 insertions, 0 deletions

diff --git a/actionpack/test/controller/url_for_test.rb b/actionpack/test/controller/url_for_test.rb
index 11ced2df2a..dc07e07cb9 100644
--- a/actionpack/test/controller/url_for_test.rb
+++ b/actionpack/test/controller/url_for_test.rb
@@ -16,6 +16,10 @@ module AbstractController
         W.default_url_options[:host] = 'www.basecamphq.com'
       end
 
+      def add_numeric_host!
+        W.default_url_options[:host] = '127.0.0.1'
+      end
+
       def test_exception_is_thrown_without_host
         assert_raise ArgumentError do
           W.new.url_for :controller => 'c', :action => 'a', :id => 'i'
@@ -81,6 +85,13 @@ module AbstractController
         )
       end
 
+      def test_subdomain_may_be_accepted_with_numeric_host
+        add_numeric_host!
+        assert_equal('http://127.0.0.1/c/a/i',
+          W.new.url_for(:subdomain => 'api', :controller => 'c', :action => 'a', :id => 'i')
+        )
+      end
+
       def test_domain_may_be_changed
         add_host!
         assert_equal('http://www.37signals.com/c/a/i',