Move useful QTest template specializations to global header file

Fix KDBX test linker errors on Windows

tests/gui/CMakeLists.txt

@@ -13,6 +13,8 @@
 #  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_directories(${CMAKE_CURRENT_SOURCE_DIR}/..)
+
 add_unit_test(NAME testgui SOURCES TestGui.cpp TemporaryFile.cpp LIBS ${TEST_LIBRARIES})
 
 add_unit_test(NAME testguipixmaps SOURCES TestGuiPixmaps.cpp LIBS ${TEST_LIBRARIES})

tests/gui/TestGui.cpp

@@ -17,6 +17,7 @@
  */
 
 #include "TestGui.h"
+#include "TestGlobal.h"
 
 #include <QAction>
 #include <QApplication>
@@ -29,7 +30,6 @@
 #include <QPlainTextEdit>
 #include <QComboBox>
 #include <QTemporaryFile>
-#include <QTest>
 #include <QToolBar>
 #include <QToolButton>
 #include <QTimer>

tests/gui/TestGuiPixmaps.cpp

@@ -16,13 +16,8 @@
  */
 
 #include "TestGuiPixmaps.h"
-
-#include <QTest>
-
-#include "core/Database.h"
+#include "TestGlobal.h"
 #include "core/DatabaseIcons.h"
-#include "core/Entry.h"
-#include "core/Group.h"
 #include "core/Metadata.h"
 #include "crypto/Crypto.h"