What is the test for ordering a defendant to pay his or her attorney's fees?

Section 987.8, subdivision (b), "provides that, upon the conclusion of criminal proceedings in the trial court, the court may, after giving the defendant notice and a hearing, make a determination of his present ability to pay all or a portion of the cost of the legal assistance provided him." (People v. Flores (2003) 30 Cal.4th 1059, 1061 (Flores).) At such a hearing, the defendant is entitled to various rights, including the right to be heard in person, to present witnesses and documentary evidence, to confront and cross-examine adverse witnesses, to disclosure of the evidence against him or her, and to a written statement of the court's findings. ( 987.8, subds. (e)(1)-(e)(5).) "While the statutory language does not mandate an express finding of an ability to pay, the statute contains a presumption that those sentenced to prison do not have the ability to pay. [Citations.]" (People v. Verduzco (2012) 210 Cal.App.4th 1406, 1421.) "Thus, the court must make an express finding of unusual circumstances before ordering a state prisoner to reimburse his or her attorney. [Citations.]" (Ibid.; 987.8, subd. (g)(2)(B).)