Review Request 128397: KIconEngine: Fix QIcon::hasThemeIcon always returning true

[David Rosca]

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Review request for KDE Frameworks.


Repository: kiconthemes


Description
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QIcon::hasThemeIcon(name) checks if QIcon::name() == name, so icon engine must return empty string when icon doesn't exist.
Also implement IsNullHook for Qt 5.7. Comes with autotest.


Diffs
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  autotests/CMakeLists.txt 0c7de50 
  autotests/kiconengine_unittest.cpp PRE-CREATION 
  src/kiconengine.h 21a63f5 
  src/kiconengine.cpp 3ccc7d1 

Diff: https://git.reviewboard.kde.org/r/128397/diff/


Testing
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Issue was reported in https://bugreports.qt.io/browse/QTBUG-54595
Also similar issue https://bugs.kde.org/show_bug.cgi?id=365031 (there is a check for hasThemeIcon before using the icon, but it returns true which results in invalid icon name -> no icon).


Thanks,

David Rosca

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