Load the routes when starting a console:

- When running a console, the routes are not loaded, which results
  in not being able to see what route helpers are available.

  ```shell
  $ bin/rails c
  $ catana(dev)> app.methods.grep(/_(path|url)/) # []
  $ catana(dev)> app.foo_path # Works. The routes are now loaded.
  $ catana(dev)> app.methods.grep(/_(path|url)/) # [:foo_path]
  ```

Author: Edouard-chin

railties/lib/rails/commands/console/irb_console.rb

@@ -31,6 +31,7 @@ class NewSession < RailsHelperBase
 
       def execute(*)
         app = Rails.application
+        app.reload_routes_unless_loaded
         session = ActionDispatch::Integration::Session.new(app)
 
         # This makes app.url_for and app.foo_path available in the console

railties/test/application/console_test.rb

@@ -186,6 +186,18 @@ def test_app_helper_method
     write_prompt "app.foo_path", "/foo"
   end
 
+  def test_app_routes_are_loaded
+    app_file "config/routes.rb", <<-RUBY
+      Rails.application.routes.draw do
+        get 'foo', to: 'foo#index'
+      end
+    RUBY
+
+    spawn_console("-e development")
+
+    write_prompt "app.methods.grep(/foo_path/)", "[:foo_path]"
+  end
+
   def test_reload_command_fires_preparation_and_cleanup_callbacks
     options = "-e development"
     spawn_console(options)