EcomDev_PHPUnit Tip #9

Tip #9: Checkout Test

3 Years ago I already wrote an article about how to write a checkout integration test. But the practices used there are not longer up to date and some workarounds have become unnecessary. This post shows what’s necessary to write a test that simulates the Magento checkout, using techniques learned in Tip #1.

1. Since there are some singletons involved, make sure to reset their state:

   /*
    * @test
    * @singleton checkout/session
    * @singleton customer/session
    * @singleton checkout/cart
    */
   

2. You should visit the cart page once to trigger totals collection. Assuming, the customer id is 1 and she has an active quote (from previously added products in the test or from a quote fixture), you start with:

   $this->customerSession(1);
   $this->dispatch('checkout/cart');
   

3. Before each new request, you have to reset the checkout session singleton manually within the test, otherwise the quote is not reloaded and you might even lose it completely:

   Mage::unregister('_singleton/checkout/session');
   $this->customerSession(1);
   $this->dispatch('checkout/onepage');

4. Sometimes you want to logout a customer with active shopping cart. This needs three steps:

   Mage::getSingleton('customer/session')->logout();
   Mage::getSingleton('checkout/cart')->unsetData();
   $this->guestSession();