What is the test used to determine whether a plaintiff has information of circumstances sufficient to put a reasonable person on inquiry?

We have stated the " 'test is whether the plaintiff has information of circumstances sufficient to put a reasonable person on inquiry, or has the opportunity to obtain knowledge from sources open to his or her investigation.' [Citations.] If plaintiff believes because of injuries she has suffered that someone has done something wrong, such a fact is sufficient to alert a plaintiff 'to the necessity for investigation and pursuit of her remedies.' [Citations.]" (Graham v. Hansen (1982) 128 Cal.App.3d 965, 972-973, 180 Cal.Rptr. 604.) ²