Only assign known good values of the index to "indexLast" as otherwise
we could end up returning an invalid index value from it if "indexBest"
was never set and the last index wasn't a valid one, as it happened in
wxBitmapBundleImplSet containing an original bitmap and a x2 scaled copy
of it, which shouldn't be used for further scaling.
Add a unit test checking that this bug is fixed now.
This directory contains tests for the library and is mostly useful for the
library developers. See the samples subdirectory for the examples that are
more useful to the application developers using the library.
If you do work on the library itself and would like to modify an existing or
add a new test, please see docs/contributing/how-to-write-unit-tests.md for
more information.
This file also contains the instructions for running the tests if you'd just
like to do it to confirm that the library works correctly.
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