What is the test for admitting "new evidence" in a civil case?

The rules relating to the exercise of discretion to admit fresh or "new evidence" were stated in Palmer v. The Queen, 1979 CanLII 8 (SCC), [1980] 1 S.C.R. 759 [at 775]: (1) The evidence should generally not be admitted if, by due diligence, it could have been adduced at trial provided that this general principle will not be applied as strictly in a criminal case as in a civil case. . . (2) The evidence must be relevant in the sense that it bears upon a decisive or potentially decisive issue in the trial. (3) The evidence must be credible in the sense that it is reasonably capable of belief, and (4) It must be such that if believed it could reasonably, when taken with the other evidence adduced at trial, be expected to have affected the result.