fix(order_spec): Expect to be logged in

Before accessing the cart we need to expect to
be logged in.

Author: tvdeyen

spec/features/order_spec.rb

@@ -24,6 +24,7 @@
       fill_in "Email", with: user.email
       fill_in "Password", with: user.password
       click_button "Login"
+      expect(page).to have_text "Logged in successfully"
 
       click_link "Cart"
       expect(page).to have_text "RoR Mug"