What is the test for determining whether a decree is final or interlocutory?

"It is the substance and effect of the adjudication, and not the form, which determine if the order is interlocutory and nonappealable, or final and appealable. [Citation.] If no issues in the action remain for further consideration, the decree is final and appealable. But if further judicial action is required for a final determination of the rights of the parties, the decree is interlocutory. [Citation.] The decree will not be appealable 'unless it comes within the statutory classes of appealable interlocutory judgments.' [Citations.]" (Doran v. Magan, supra, 76 Cal.App.4th at p. 1293.)