refactor: Rename blackgui to swift::gui

tests/gui/blackguitest.h

@@ -0,0 +1,20 @@
+// SPDX-FileCopyrightText: Copyright (C) 2013 swift Project Community / Contributors
+// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-swift-pilot-client-1
+
+#ifndef BLACKGUITEST_H
+#define BLACKGUITEST_H
+
+//! \cond PRIVATE_TESTS
+
+/*!
+ * \namespace SwiftGuiTest
+ * \defgroup testswiftgui Gui Unit Tests
+ * \ingroup tests
+ * Unit tests for GUI. Unit tests do have their own namespace, so
+ * the regular namespace swift:gui is completely free of unit tests.
+ * Add any new tests to TestMain::unitMain as shown there.
+ */
+
+//! \endcond
+
+#endif // guard