What is the test for granting probation to a defendant who has pleaded guilty to a charge of assault under section 17 and 1203 of the California Penal Code?

Id. at pp. 438439, 106 Cal.Rptr.3d 518, 226 P.3d 998.) A grant of probation is intended to afford the defendant an opportunity to demonstrate over the prescribed probationary term that his or her conduct has reformed to the degree that punishment for the offense may be mitigated or waived.... When a trial court grants probation without imposing a sentence, sections 17 and 1203.4, read together, express the legislative purpose that an alternatively punishable offense remains a felony ... until the statutory rehabilitation procedure has been had.... (Id. at p. 439, 106 Cal.Rptr.3d 518, 226 P.3d 998.) If ultimately a misdemeanor sentence is imposed, the offense is a misdemeanor from that point on, but not retroactively. (Ibid. ; see People v. Moomey (2011) 194 Cal.App.4th 850, 857, 123 Cal.Rptr.3d 749.)