What is the test for corroboration in a sexual assault case?

'* * * The rule as to what extent corroboration is necessary to connect or tend to connect a defendant with the commission of a crime appears in the case of People v. Negra, 208 Cal. 64, 69, 280 P. 354, 356, where the court states: 'The evidence tending to connect a defendant with the commission of the crime may be slight and, when standing by itself, entitled to but little consideration. * * * The law does not require that the evidence necessary to corroborate the testimony of an accomplice shall tend to establish the precise facts testified to by the accomplice; and strong corroborative testimony is not necessary to support a judgment of conviction founded on the testimony of an accomplice. Even though circumstantial and slight, the evidence is, nevertheless, sufficient if it tends to connect the accused with the commission of the offense.''