Fixed bug where calling app method from console would raise ArgumentError [#1629 state:resolved]

Signed-off-by: NJoshua Peek <josh@joshpeek.com>

actionpack/lib/action_controller/integration.rb

@@ -81,8 +81,8 @@ class MultiPartNeededException < Exception
       end
 
       # Create and initialize a new Session instance.
-      def initialize(app)
-        @application = app
+      def initialize(app = nil)
+        @application = app || ActionController::Dispatcher.new
         reset!
       end
 
@@ -591,7 +591,6 @@ def reset!
       # can use this method to open multiple sessions that ought to be tested
       # simultaneously.
       def open_session(application = nil)
-        application ||= ActionController::Dispatcher.new
         session = Integration::Session.new(application)
 
         # delegate the fixture accessors back to the test instance

railties/test/console_app_test.rb

@@ -14,6 +14,15 @@ class ApplicationController < ActionController::Base; end
 Test::Unit.run = false
 
 class ConsoleAppTest < Test::Unit::TestCase
+  def test_app_method_should_return_integration_session
+    assert_nothing_thrown do
+      console_session = app
+      assert_not_nil console_session
+      assert_instance_of ActionController::Integration::Session,
+        console_session
+    end
+  end
+
   uses_mocha 'console reload test' do
     def test_reload_should_fire_preparation_callbacks
       a = b = c = nil