Allows assert_redirected_to to accept a regular expression

actionpack/CHANGELOG.md

 ## Rails 4.0.0 (unreleased) ##
 
+*   Allows `assert_redirected_to` to match against a regular expression. *Andy Lindeman*
+
 *   Add backtrace to development routing error page. *Richard Schneeman*
 
 *   Replace `include_seconds` boolean argument with `:include_seconds => true` option

actionpack/lib/action_dispatch/testing/assertions/response.rb

@@ -53,15 +53,18 @@ def assert_response(type, message = nil)
       #   # assert that the redirection was to the url for @customer
       #   assert_redirected_to @customer
       #
+      #   # asserts that the redirection matches the regular expression
+      #   assert_redirected_to %r(\Ahttp://example.org)
+      #
       def assert_redirected_to(options = {}, message=nil)
         assert_response(:redirect, message)
-        return true if options == @response.location
+        return true if options === @response.location
 
         redirect_is       = normalize_argument_to_redirection(@response.location)
         redirect_expected = normalize_argument_to_redirection(options)
 
         message ||= "Expected response to be a redirect to <#{redirect_expected}> but was a redirect to <#{redirect_is}>"
-        assert_equal redirect_expected, redirect_is, message
+        assert_operator redirect_expected, :===, redirect_is, message
       end
 
       private
@@ -71,17 +74,21 @@ def parameterize(value)
         end
 
         def normalize_argument_to_redirection(fragment)
-          case fragment
-          when %r{^\w[A-Za-z\d+.-]*:.*}
-            fragment
-          when String
-            @request.protocol + @request.host_with_port + fragment
-          when :back
-            raise RedirectBackError unless refer = @request.headers["Referer"]
-            refer
-          else
-            @controller.url_for(fragment)
-          end.delete("\0\r\n")
+          normalized = case fragment
+            when Regexp
+              fragment
+            when %r{^\w[A-Za-z\d+.-]*:.*}
+              fragment
+            when String
+              @request.protocol + @request.host_with_port + fragment
+            when :back
+              raise RedirectBackError unless refer = @request.headers["Referer"]
+              refer
+            else
+              @controller.url_for(fragment)
+            end
+
+          normalized.respond_to?(:delete) ? normalized.delete("\0\r\n") : normalized
         end
     end
   end

actionpack/test/controller/action_pack_assertions_test.rb

@@ -178,6 +178,9 @@ def test_assert_redirect_to_named_route_failure
       assert_raise(ActiveSupport::TestCase::Assertion) do
         assert_redirected_to 'http://test.host/route_two'
       end
+      assert_raise(ActiveSupport::TestCase::Assertion) do
+        assert_redirected_to %r(^http://test.host/route_two)
+      end
       assert_raise(ActiveSupport::TestCase::Assertion) do
         assert_redirected_to :controller => 'action_pack_assertions', :action => 'nothing', :id => 'two'
       end
@@ -212,6 +215,7 @@ def test_assert_redirected_to_top_level_named_route_from_nested_controller
       process :redirect_to_top_level_named_route
       # assert_redirected_to "http://test.host/action_pack_assertions/foo" would pass because of exact match early return
       assert_redirected_to "/action_pack_assertions/foo"
+      assert_redirected_to %r(/action_pack_assertions/foo)
     end
   end