verifyNever top-level property Null safety
Verify that a method on a mock object was never called with the given arguments.
Call a method on a mock object within a
verifyNever call. For example:
cat.eatFood("chicken"); verifyNever(() => cat.eatFood("fish"));
Mocktail will pass the current test case, as
cat.eatFood has not been
_Verify get verifyNever => _makeVerify(true);