title: Repeat triggering of 'woocommerce_payment_complete' hook for dev
body: <p>'woocommerce_payment_complete' is the hook that is triggered when payment is flagged as accepted by your payment gateway in WooCommerce.</p>
  
  <p>It's a really useful hook because you can make things happen as soon as payment passes.</p>
  
  <p>The problem I'm having it testing custom functions I attach to the hook - it is <em>extremely</em> laborious.</p>
  
  <p>Basically, every time I want to test one of my functions attached to this hook I have to fill up my card, go through check out, submit payment then analyse what happens. If there's a bug or error then I have to fill up my card, go through check out, submit payment then analyse what happens all over again.</p>
  
  <p>I'm losing hours doing this, so I was wondering, does anyone have a dev tip to make this less time consuming?</p>