Refactor the handling of default_url_options in integration tests

This commit improves the handling of default_url_options in integration
tests by making behave closer to how a real application operates.

Specifically the following issues have been addressed:

* Options specified in routes.rb are used (fixes #546)
* Options specified in controllers are used
* Request parameters are recalled correctly
* Tests can override default_url_options directly

actionpack/lib/action_dispatch/testing/integration.rb

@@ -201,9 +201,16 @@ module ActionDispatch
         reset!
       end
 
-      remove_method :default_url_options
-      def default_url_options
-        { :host => host, :protocol => https? ? "https" : "http" }
+      def url_options
+        @url_options ||= default_url_options.dup.tap do |url_options|
+          url_options.reverse_merge!(controller.url_options) if controller
+
+          if @app.respond_to?(:routes) && @app.routes.respond_to?(:default_url_options)
+            url_options.reverse_merge!(@app.routes.default_url_options)
+          end
+
+          url_options.reverse_merge!(:host => host, :protocol => https? ? "https" : "http")
+        end
       end
 
       # Resets the instance. This can be used to reset the state information
@@ -216,6 +223,7 @@ module ActionDispatch
         @controller = @request = @response = nil
         @_mock_session = nil
         @request_count = 0
+        @url_options = nil
 
         self.host        = DEFAULT_HOST
         self.remote_addr = "127.0.0.1"
@@ -310,6 +318,7 @@ module ActionDispatch
           response = _mock_session.last_response
           @response = ActionDispatch::TestResponse.new(response.status, response.headers, response.body)
           @html_document = nil
+          @url_options = nil
 
           @controller = session.last_request.env['action_controller.instance']
 
@@ -367,12 +376,14 @@ module ActionDispatch
         end
       end
 
-      extend ActiveSupport::Concern
-      include ActionDispatch::Routing::UrlFor
-
-      def url_options
+      def default_url_options
         reset! unless integration_session
-        integration_session.url_options
+        integration_session.default_url_options
+      end
+
+      def default_url_options=(options)
+        reset! unless integration_session
+        integration_session.default_url_options = options
       end
 
       def respond_to?(method, include_private = false)
@@ -476,6 +487,7 @@ module ActionDispatch
   class IntegrationTest < ActiveSupport::TestCase
     include Integration::Runner
     include ActionController::TemplateAssertions
+    include ActionDispatch::Routing::UrlFor
 
     @@app = nil
 
@@ -495,5 +507,10 @@ module ActionDispatch
     def app
       super || self.class.app
     end
+
+    def url_options
+      reset! unless integration_session
+      integration_session.url_options
+    end
   end
 end

actionpack/test/controller/integration_test.rb

@@ -615,3 +615,83 @@ class EnvironmentFilterIntegrationTest < ActionDispatch::IntegrationTest
     assert_equal '[FILTERED]', request.filtered_env['rack.request.form_vars']
   end
 end
+
+class UrlOptionsIntegrationTest < ActionDispatch::IntegrationTest
+  class FooController < ActionController::Base
+    def index
+      render :text => "foo#index"
+    end
+
+    def show
+      render :text => "foo#show"
+    end
+
+    def edit
+      render :text => "foo#show"
+    end
+  end
+
+  class BarController < ActionController::Base
+    def default_url_options
+      { :host => "bar.com" }
+    end
+
+    def index
+      render :text => "foo#index"
+    end
+  end
+
+  def self.routes
+    @routes ||= ActionDispatch::Routing::RouteSet.new
+  end
+
+  def self.call(env)
+    routes.call(env)
+  end
+
+  def app
+    self.class
+  end
+
+  routes.draw do
+    default_url_options :host => "foo.com"
+
+    scope :module => "url_options_integration_test" do
+      get "/foo" => "foo#index", :as => :foos
+      get "/foo/:id" => "foo#show", :as => :foo
+      get "/foo/:id/edit" => "foo#edit", :as => :edit_foo
+      get "/bar" => "bar#index", :as => :bars
+    end
+  end
+
+  test "session uses default url options from routes" do
+    assert_equal "http://foo.com/foo", foos_url
+  end
+
+  test "current host overrides default url options from routes" do
+    get "/foo"
+    assert_response :success
+    assert_equal "http://www.example.com/foo", foos_url
+  end
+
+  test "controller can override default url options from request" do
+    get "/bar"
+    assert_response :success
+    assert_equal "http://bar.com/foo", foos_url
+  end
+
+  test "test can override default url options" do
+    default_url_options[:host] = "foobar.com"
+    assert_equal "http://foobar.com/foo", foos_url
+
+    get "/bar"
+    assert_response :success
+    assert_equal "http://foobar.com/foo", foos_url
+  end
+
+  test "current request path parameters are recalled" do
+    get "/foo/1"
+    assert_response :success
+    assert_equal "/foo/1/edit", url_for(:action => 'edit', :only_path => true)
+  end
+end