Prepare autotests

plugins/messageviewerconfigureplugins/foldersettings/autotests/CMakeLists.txt

+macro(add_foldersettings_plugin_unittest _source )
+    set( _test ${_source})
+    get_filename_component(_name ${_source} NAME_WE)
+    add_executable( ${_name} ${_test} )
+    add_test(NAME ${_name} COMMAND ${_name} )
+
+    ecm_mark_as_test(foldersettings-${_name})
+    target_link_libraries( ${_name} KF5::PimCommon Qt5::Test KF5::I18n KF5::MessageViewer folderconfiguresettings)
+endmacro ()
+
+
+add_foldersettings_plugin_unittest(folderconfiguresettingswidgettest.cpp)

plugins/messageviewerconfigureplugins/foldersettings/autotests/folderconfiguresettingswidgettest.cpp

+/*
+   Copyright (C) 2020 Laurent Montel <montel@kde.org>
+
+   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 2 of the License, or (at your option) any later version.
+
+   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; see the file COPYING.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+*/
+
+#include "folderconfiguresettingswidgettest.h"
+#include "../folderconfiguresettingswidget.h"
+#include <QTest>
+QTEST_MAIN(FolderConfigureSettingsWidgetTest)
+FolderConfigureSettingsWidgetTest::FolderConfigureSettingsWidgetTest(QObject *parent)
+    : QObject(parent)
+{
+
+}

plugins/messageviewerconfigureplugins/foldersettings/autotests/folderconfiguresettingswidgettest.h

+/*
+   Copyright (C) 2020 Laurent Montel <montel@kde.org>
+
+   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 2 of the License, or (at your option) any later version.
+
+   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; see the file COPYING.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+*/
+
+#ifndef FOLDERCONFIGURESETTINGSWIDGETTEST_H
+#define FOLDERCONFIGURESETTINGSWIDGETTEST_H
+
+#include <QObject>
+
+class FolderConfigureSettingsWidgetTest : public QObject
+{
+    Q_OBJECT
+public:
+    explicit FolderConfigureSettingsWidgetTest(QObject *parent = nullptr);
+    ~FolderConfigureSettingsWidgetTest() = default;
+};
+
+#endif // FOLDERCONFIGURESETTINGSWIDGETTEST_H