Ref T275, unit tests for FSX/P3D

In that very case testing the offsets for request ids

tests/blacksimpluginfsxp3d/testfsxp3dcommon.h

@@ -0,0 +1,38 @@
+/* Copyright (C) 2018
+ * swift project community / contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#ifndef BLACKSIMPLUGINFSXP3D_TESTFSXP3DCOMMON_H
+#define BLACKSIMPLUGINFSXP3D_TESTFSXP3DCOMMON_H
+
+//! \cond PRIVATE_TESTS
+//! \file
+//! \ingroup testblacksimplugin
+
+#include <QObject>
+
+namespace BlackSimPluginFsxP3D
+{
+    //! FSX/P3D common tests
+    class CTestFsxP3DCommon : public QObject
+    {
+        Q_OBJECT
+
+    public:
+        //! Standard test case constructor
+        explicit CTestFsxP3DCommon(QObject *parent = nullptr) : QObject(parent) {}
+
+    private slots:
+        //! Request IDs
+        void requestIds();
+    };
+} // namespace
+
+//! \endcond
+
+#endif // guard