What is the test for a claim of ineffective assistance of counsel?

Lastly, we must reject defendant's claim of ineffective assistance of counsel. In his letter brief, defendant argues his trial counsel advised him not to accept a more favorable plea of "three years w/ half (with promise of a better one)." This claim, however, should be raised, if at all, in a habeas corpus proceeding. In order to succeed on a claim of ineffective assistance of counsel, defendant must show his counsel's action or inaction was not a reasonable tactical choice, and in most cases " ' " ' "the record on appeal sheds no light on why counsel acted or failed to act in the manner challenged . . . ." ' " ' " (People v. Jones (2003) 30 Cal.4th 1084, 1105.)