This focuses on some scenarios that are
a) complex enough to be worth a test,
b) but simple enough so I don't need to spend hours on comming up
with a test setup. ;-)
This patch also simplifies the ARIA related code in
MWTransclusionOutlinePartWidget a bit.
* Check 1 of the 3 ARIA configs only. Only having one is already
helpful and should not be skipped.
* No need for the large conditional. setAriaDescribedBy() works fine
with undefined.
Bug: T291157
Change-Id: I142782ec9b96147de64497f4f6a373eae05b9c8e
This is just the smallest possible boilerplate to get the first
trivial test running. More test cases will be added in the
following patches.
Bug: T289560
Change-Id: I3a4e49a7b9761db00b211e933386bad71d4f0942