Try testing with QGuiApplication and QT_QPA_PLATFORM set to offscreen.

Author: Christian Feldmann

.github/workflows/Build.yml

@@ -30,6 +30,8 @@ jobs:
         make -j$(nproc)
     - name: Run Unittests
       run: $GITHUB_WORKSPACE/build/YUViewUnitTest/YUViewUnitTest
+      env:
+        QT_QPA_PLATFORM: 'offscreen'
   build-mac-native:
     runs-on: ${{ matrix.os }}
     strategy:
@@ -51,6 +53,8 @@ jobs:
         make -j $(sysctl -n hw.logicalcpu)
     - name: Run Unittests
       run: $GITHUB_WORKSPACE/build/YUViewUnitTest/YUViewUnitTest
+      env:
+        QT_QPA_PLATFORM: 'offscreen'
   build-linux-mac:
     runs-on: ${{ matrix.os }}
     strategy:
@@ -105,6 +109,8 @@ jobs:
         make -j 4
     - name: Run Unittests
       run: $GITHUB_WORKSPACE/build/YUViewUnitTest/YUViewUnitTest
+      env:
+        QT_QPA_PLATFORM: 'offscreen'
     - name: Build App (Mac)
       if: runner.os	== 'macOS'
       run: |
@@ -184,6 +190,8 @@ jobs:
         jom
     - name: Run Unittests
       run: ${{ github.workspace }}\build\YUViewUnitTest\YUViewUnitTest
+      env:
+        QT_QPA_PLATFORM: 'offscreen'
     - name: WindeployQT
       run: |
         mkdir deploy

YUViewUnitTest/YUViewUnitTest.pro

@@ -17,7 +17,6 @@ INCLUDEPATH += $$top_srcdir/submodules/googletest/googletest/include \
                $$top_srcdir/YUViewUnitTest/common \
                $$top_builddir/YUViewLib
 LIBS += -L$$top_builddir/submodules/googletest-qmake/gtest -lgtest
-LIBS += -L$$top_builddir/submodules/googletest-qmake/gtest_main -lgtest_main
 LIBS += -L$$top_builddir/YUViewLib -lYUViewLib
 
 #win32-msvc* {

YUViewUnitTest/main.cpp

@@ -0,0 +1,41 @@
+/*  This file is part of YUView - The YUV player with advanced analytics toolset
+ *   <https://github.com/IENT/YUView>
+ *   Copyright (C) 2015  Institut für Nachrichtentechnik, RWTH Aachen University, GERMANY
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   In addition, as a special exception, the copyright holders give
+ *   permission to link the code of portions of this program with the
+ *   OpenSSL library under certain conditions as described in each
+ *   individual source file, and distribute linked combinations including
+ *   the two.
+ *
+ *   You must obey the GNU General Public License in all respects for all
+ *   of the code used other than OpenSSL. If you modify file(s) with this
+ *   exception, you may extend this exception to your version of the
+ *   file(s), but you are not obligated to do so. If you do not wish to do
+ *   so, delete this exception statement from your version. If you delete
+ *   this exception statement from all source files in the program, then
+ *   also delete it here.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <QGuiApplication>
+#include <gtest/gtest.h>
+
+int main(int argc, char **argv)
+{
+  testing::InitGoogleTest(&argc, argv);
+  QGuiApplication app(argc, argv);
+  return RUN_ALL_TESTS();
+}