Add a test that checks that QHash keeps the first of the keys
that compare equal. This may or may not be documented, but is
inconsistent with the values in a QHash, where the last element
with equal key is kept.
Document this as a test. That way, we'll be informed when the
behavior changes (e.g. by a port to std::unordered_map).
Do the equivalent checks in tst_QMap, too. There, of course,
instead of equal keys, check equivalent ones.
Change-Id: I2c5f04f8e8a6bbc7dbaadadd878a4c876e4df042
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
54a4488ca5