Fix failing test regarding console change to fix sandboxing

Introduced in be3e10c.

Author: carlosantoniodasilva

railties/test/commands/console_test.rb

@@ -58,10 +58,7 @@ def test_console_with_environment
   end
 
   def test_console_defaults_to_IRB
-    config = mock("config", console: nil)
-    app = mock("app", config: config)
-    app.expects(:load_console).returns(nil)
-
+    app = build_app(console: nil)
     assert_equal IRB, Rails::Console.new(app).console
   end
 
@@ -127,13 +124,15 @@ def start(argv = [])
   end
 
   def app
-    @app ||= begin
-      config = mock("config", console: FakeConsole)
-      app = mock("app", config: config)
-      app.stubs(:sandbox=).returns(nil)
-      app.expects(:load_console)
-      app
-    end
+    @app ||= build_app(console: FakeConsole)
+  end
+
+  def build_app(config)
+    config = mock("config", config)
+    app = mock("app", config: config)
+    app.stubs(:sandbox=).returns(nil)
+    app.expects(:load_console)
+    app
   end
 
   def parse_arguments(args)