What is the test for establishing ineffective assistance of counsel?

"Establishing a claim of ineffective assistance of counsel requires the defendant to demonstrate (1) counsel's performance was deficient in that it fell below an objective standard of reasonableness under prevailing professional norms, and (2) counsel's deficient representation prejudiced the defendant ...." (People v. Dennis (1998) 17 Cal.4th 468, 540.)

"Our review is deferential; we make every effort to avoid the distorting effects of hindsight and to evaluate counsel's conduct from counsel's perspective at the time. [Citation.] A court must indulge a strong presumption that counsel's acts were within the wide range of reasonable professional assistance. [Citation.]" (People v. Dennis, supra, 17 Cal.4th at p. 541.) "In general, reviewing courts defer to trial counsel's tactical decisions in assessing a claim of ineffective assistance, and the burden rests on the defendant to show that counsel's conduct falls outside the wide range of competent representation. [Citations.] In order to prevail on such a claim on direct appeal, the record must affirmatively disclose the lack of a rational tactical purpose for the challenged act or omission. [Citations.]" (People v. Ray (1996) 13 Cal.4th 313, 349.)

"When a defendant makes an ineffectiveness claim on appeal, the appellate court must look to see if the record contains any explanation for the challenged aspects of representation. If the record sheds no light on why counsel acted or failed to act in the manner challenged, 'unless counsel was asked for an explanation and failed to provide one, or unless there simply could be no satisfactory explanation' [citation], the case is affirmed [citation]. In such cases, the ineffective-assistance claim is more appropriately made in a petition for habeas corpus. [Citations.]" (People v. Babbitt (1988) 45 Cal.3d 660, 707.)