Add tst_dropArea

Removed the requirement to have a parent, it's not really needed,
conceptually.

CMakeLists.txt

@@ -458,6 +458,7 @@ if(KDDockWidgets_TESTS)
 
         add_test(NAME tst_view COMMAND tst_view)
         add_test(NAME tst_window COMMAND tst_window)
+        add_test(NAME tst_droparea COMMAND tst_droparea)
         add_test(NAME tst_platform COMMAND tst_platform)
         add_test(NAME tst_viewguard COMMAND tst_viewguard)
         add_test(NAME tst_group COMMAND tst_group)

src/controllers/DropArea.cpp

@@ -64,11 +64,11 @@ DropArea::DropArea(View *parent, MainWindowOptions options, bool isMDIWrapper)
     , m_dropIndicatorOverlay(createDropIndicatorOverlay(this))
     , m_centralFrame(createCentralFrame(options))
 {
-    Q_ASSERT(parent);
     setRootItem(new Layouting::ItemBoxContainer(view()));
     DockRegistry::self()->registerLayout(this);
 
-    setLayoutSize(parent->size());
+    if (parent)
+        setLayoutSize(parent->size());
 
     // Initialize min size
     updateSizeConstraints();

tests/CMakeLists.txt

@@ -69,6 +69,9 @@ target_link_libraries(tst_view kddockwidgets kdbindings)
 add_executable(tst_window tst_window.cpp ${TESTING_RESOURCES})
 target_link_libraries(tst_window kddockwidgets kdbindings)
 
+add_executable(tst_droparea tst_droparea.cpp ${TESTING_RESOURCES})
+target_link_libraries(tst_droparea kddockwidgets kdbindings)
+
 add_executable(tst_platform tst_platform.cpp ${TESTING_RESOURCES})
 target_link_libraries(tst_platform kddockwidgets kdbindings)
 

tests/tst_droparea.cpp

@@ -0,0 +1,20 @@
+/*
+  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/DropArea.h"
+#include "Platform.h"
+
+TEST_CASE("DropArea CTOR")
+{
+    // Tests that ctor runs and doesn't leak
+    Controllers::DropArea da(nullptr, {});
+}