Adds initial intermediate qt6 porting state

qt6-after/qt6-migrated-legatus/Z/src/nglwidgets/test_nglpdfwidget.cpp

@@ -0,0 +1,20 @@
+#include <QTest>
+#include "nglpdfwidget.h"
+
+class TestPDFWidget : public QObject
+{
+  Q_OBJECT
+
+private slots:
+  void initTestCase() {}
+  void cleanupTestCase() {}
+
+  void testConstruct()
+  {
+    NGL::PDFWidget w;
+    QVERIFY(w.numPages() >= 0);
+  }
+};
+
+QTEST_MAIN(TestPDFWidget)
+#include "test_nglpdfwidget.moc"