[Octave-bug-tracker] [bug #58216] bar: stacked bar chart improperly handles negative values

[Nicholas Jankowski]

Follow-up Comment #14, bug #58216 (project octave):

One of those cases where the lack of actual output tests on some graphics
objects can let things slip through. When I added the error checks I was
wondering about ways to have actual BISTS for something like bar.  since bar
just returns handles, could tests be made to probe some handle properties that
would confirm proper bar values (size/shape/coordinates)? then something like
the ypos/neg issue should trigger a failed test if it results in a malformed
bar set.  I admit to not thinking too hard about it or whether tests of that
type could introduce more problems than it solves, depending on how fragile
relying on those properties was. But if that approach isn't bad, I assume it
could apply to quite a number of functions. I could take a peek at such things
if that would be worthwhile.

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