expected exception, nothing thrown: (stack frames omitted)
  Expecting code to raise a throwable.
wrong message: (stack frames omitted)
  Expecting message to be:
    "payment failed"
  but was:
    "payment failed for order o-45"
  
  Throwable that failed the check:
  
  lab.assertj.custom.CheckoutException: payment failed for order o-45
  Caused by: java.lang.IllegalStateException: gateway unavailable
  Caused by: java.io.IOException: connection reset by gateway
wrong type: (stack frames omitted)
  Expecting actual throwable to be an instance of:
    java.lang.IllegalStateException
  but was:
    lab.assertj.custom.CheckoutException: payment failed for order o-45