What is the test for ordering a defendant to pay the cost of his attorney at public expense?

initially appoints an attorney for a defendant at public expense, it must give notice to the defendant that the court may require the defendant to reimburse all or a portion of the cost of representation following notice and a hearing if it is determined that the defendant has the present ability to pay. ( 987.8, subd. (f).) The statute further specifies that a reimbursement order may only be imposed after giving the defendant notice and an opportunity to be heard on the issue of the defendant's present ability to pay. ( 987.8, subds. (b), (d).) In the case of a defendant sentenced to prison, the court must make an express finding of unusual circumstances before ordering the defendant to reimburse the cost of representing the defendant. (People v. Lopez (2015) 129 Cal.App.4th 1508, 1537.)