What is the test for a plea of guilty or no contest under section 1192.5 of the California Criminal Code?

"Pursuant to section 1192.5, a trial court is obligated to determine whether there is a factual basis for a plea of guilty or no contest when that plea arises from a negotiated resolution of the charges. (See People v. Hoffard [(1995)] 10 Cal.4th [1170,] 1182 [43 Cal.Rptr.2d 827, 899 P.2d 896].) Although not constitutionally required ( id. at p. 1183 [43 Cal.Rptr.2d 827, 899 P.2d 896] ), such an inquiry furthers constitutional considerations attending a guilty plea ( id. at p. 1183, fn. 11 [43 Cal.Rptr.2d 827, 899 P.2d 896] ), protects against the entry of a guilty plea by an innocent defendant, and makes a record in the event of appellate or collateral attacks on that plea. ( Id. at p. 1183 [43 Cal.Rptr.2d 827, 899 P.2d 896].) ... A sufficient factual inquiry must be considered a necessary component of the legality of the proceedings. To decide otherwise would preclude review of the factual basis for a plea of guilty or no contest thereby frustrating the

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policies the statute is intended to advance....