tests: Add tst_titlebar

At least for the ctor, which already helps to find bugs in
the .qml file

CMakeLists.txt

@@ -357,6 +357,7 @@ if(${PROJECT_NAME}_TESTS)
     add_test(NAME tst_viewwrapper COMMAND tst_viewwrapper)
     add_test(NAME tst_viewguard COMMAND tst_viewguard)
     add_test(NAME tst_frame COMMAND tst_frame)
+    add_test(NAME tst_titlebar COMMAND tst_titlebar)
 
     if(NOT ${PROJECT_NAME}_QTQUICK)
       # tst_multisplitter depends on QWidget

tests/CMakeLists.txt

@@ -63,4 +63,7 @@ add_executable(tst_viewwrapper tst_viewwrapper.cpp ${TESTING_RESOURCES})
 target_link_libraries(tst_viewwrapper kddockwidgets)
 
 add_executable(tst_frame controllers/tst_frame.cpp ${TESTING_RESOURCES})
-target_link_libraries(tst_frame kddockwidgets)
+target_link_libraries(tst_frame kddockwidgets)
+
+add_executable(tst_titlebar controllers/tst_titlebar.cpp ${TESTING_RESOURCES})
+target_link_libraries(tst_titlebar kddockwidgets)

tests/controllers/tst_titlebar.cpp

@@ -0,0 +1,27 @@
+/*
+  This file is part of KDDockWidgets.
+
+  SPDX-FileCopyrightText: 2019-2022 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
+  Author: Sérgio Martins <sergio.martins@kdab.com>
+
+  SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only
+
+  Contact KDAB at <info@kdab.com> for commercial licensing options.
+*/
+
+#include "../main.h"
+#include "controllers/TitleBar.h"
+#include "controllers/Frame.h"
+
+#include "qtquick/Platform_qtquick.h"
+
+#include <QQmlContext>
+#include <QQmlEngine>
+
+TEST_CASE("TitleBar Ctor")
+{
+    auto frame = new Controllers::Frame(nullptr, {});
+    auto tb = new Controllers::TitleBar(frame);
+    delete tb;
+    delete frame;
+}