QIcon: don't rely on getting a null-icon in test

If a QPA-provided engine provides an "edit-cut" icon, then it won't be
null. We cannot reliably test that the icon came from the fallback theme
as the cacheKey of the icon doesn't change (the proxying to a different
theme is handled internally by the QThemeIconEngine).

That the cacheKey of a QIcon doesn't change even if the pixmaps we get
from it change is not a problem in practice; QIcon is a named container
for  transient graphical assets that might change for reasons outside of
Qt's control (such as color scheme, or display resolution).

Change-Id: I695e8ad0c8f0aec7f17a2c242e64b615178b78b5
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

0 files changed, 0 insertions, 0 deletions