What is the test for a motion by a judge to delay a defendant's day of judgment by discharging his prior counsel?

so arbitrary as to violate due process, the reviewing court looks to the circumstances of each case, '"particularly in the reasons presented to the trial judge at the time the request [was] denied."' [Citations.]" (Id. at p. 791.) "'"The right to counsel cannot mean that a defendant may continually delay his day of judgment by discharging prior counsel,"' and the court is within its discretion to deny a last-minute motion for continuance to secure new counsel. [Citation.]" (People v. Keshishian (2008) 162 Cal.App.4th 425, 429.)