What is the test for an application to amend a pleading to amend the pleadings?

The approach to granting leave to amend pleadings has always been one of permissiveness so as to have reasonable causes of action that have all elements of association tried together. The underlying requirement is that the proposed amendments disclose a reasonable cause of action. In determining this requirement the approach is to consider whether, assuming the proposed amendments contained facts are proven, is it plain and obvious that the proposed claim discloses no reasonable claim. If that cannot be said the cause of action is permitted to stand (see Hunt v. Carey Canada (1990), 1990 CanLII 90 (SCC), 49 B.C.L.R. (2d) 273 (S.C.C.), at 273-289). In the context of this application unless it can be said the proposed amendment discloses no reasonable claim the amendment should be allowed.