What is the test for determining credibility of a prosecution witness?

In determining the credibility of a witness, the trier of fact may consider, among other things, the "existence or nonexistence of a bias, interest, or other motive." (Evid. Code, 780, subd. (f).) Nonetheless, trial courts retain wide latitude to impose reasonable limits on defense inquiry into potential bias of a prosecution witness. (People v. Price (1991) 1 Cal.4th 324, 422, superseded on other grounds as stated in People v. Hinks (1997) 58 Cal.App.4th 1157, 1162.)