tst_QVariant: add a test contrasting Qt 5/6 isNull behaviorHEADdev

A null QString used to make a QVariant containing it null in Qt 5, but
this is no longer the case. Add a test that get_if works as expected.

Task-number: QTBUG-111598
Change-Id: I0f3511e1b33f4a9d67755269455680feda22ddca
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

0 files changed, 0 insertions, 0 deletions