What is the test for hearing an application for habeas corpus?

The hearing of an application for habeas corpus involves the exercise of judicial discretion. In May v. Ferndale Institution, 2005 SCC 82, [2005] 3 S.C.R. 809, the court held that a provincial superior court should exercise its jurisdiction when requested and should not decline to do so merely because another alternate or more convenient remedy exists. Two recognized exceptions where a court may decline to exercise such discretion are: (i) where a statute confers jurisdiction on a court of appeal to correct the errors of the lower court and release the applicant if need be; or (ii) where the legislator has prescribed a complete, comprehensive and expert procedure for review of the administrative decision: May at para. 44.