I am completely new to PHP unit testing, but I decided it was time to learn after discovering a critical bug in a small WooCommerce extension I had built for a client.
The extension I built added a feature that allowed administrators to limit specific coupons to new customers only. I had done some manual testing and made sure that new customers could use the coupon and existing customers could not. But there was a logic bug I missed that prevented existing customers from using any coupons, even ones that did not have the “new customer” restriction.
After finding the bug, I knew there were several use cases I would need to check every time an update was made to the plugin:
New customer should be able to apply a coupon
New customer should be able to apply a coupon with a “new customer” restriction
Existing customer should be able to apply a coupon without a “new customer” restriction
Existing customer should *not* be able to apply a coupon with the “new customer” restriction
Obviously, checking this manually each time would be rather tedious- which is why I turned to unit tests. Continue reading →
When the url of a published post is updated in WordPress, the previous url slug is saved into a meta key called _wp_old_slug and a 301 redirect is created automatically. In most cases this is exactly what you would want to happen, but there are rare cases where it can cause a problem.
I hit an odd edge case when upgrading to WordPress 4.4 on WP Engine. At some point the slugs for two WooCommerce products had been swapped, so the _wp_old_slug for ‘product-1’ was ‘product-2’, and ‘product-2’ was ‘product-1’. This should have caused an infinite redirect immediately, but for some reason those rules were ignored until the WordPress 4.4 upgrade. Continue reading →
The JetPack plugin makes it easy to add share buttons to posts in WordPress. With a little custom code it’s also possible to track how often the share buttons are clicked and which URLs are being shared.
If you have you have a lot of user accounts for subscribers (or customers if using WooCommerce or Easy Digital Downloads), you might find these functions useful for blocking access to the dashboard and simplifying logins. Continue reading →
WordPress has a button in the editor for adding blockquotes to a post. But what if an author wants to add a citation? Unfortunately, it’s not possible without a little HTML knowledge.
This is a problem I’ve thought about a bit when designing DevPress themes (what markup should I be styling for?), but it’s also come up on a few client projects recently. Citations are a pretty common use-case, and it would be great if they were easier to add.
Command line scripts can be excellent tools for fetching and quickly parsing data from an external API.
I recently wrote a script that allows you to search Zendesk tickets for a specific query term, and then returns a list of all associated e-mails. It’s something that’s impossible to do through the Zendesk UI (without a ton of clicking and copying), but really useful.