Add unit test for in-game window positioning

tests/s25Main/UI/testIngameWindow.cpp

@@ -14,6 +14,7 @@
 #include "controls/ctrlPercent.h"
 #include "controls/ctrlProgress.h"
 #include "desktops/dskGameLobby.h"
+#include "drivers/VideoDriverWrapper.h"
 #include "helpers/format.hpp"
 #include "ingameWindows/IngameWindow.h"
 #include "ingameWindows/iwConnecting.h"
@@ -228,4 +229,21 @@ BOOST_AUTO_TEST_CASE(SaveAndRestoreMinimized)
     }
 }
 
+BOOST_AUTO_TEST_CASE(WindowPositioning)
+{
+    const auto renderSize = VIDEODRIVER.GetRenderSize();
+    // Use a window with persistent settings
+    IngameWindow wnd(CGI_MINIMAP, DrawPoint(0, 0), Extent(100, 100), "Test Window", nullptr);
+
+    // start in bottom right corner; window should stick to the corner when resizing
+    wnd.SetPos(DrawPoint(renderSize.x, renderSize.y));
+    BOOST_TEST(wnd.GetPos() == DrawPoint(renderSize - wnd.GetSize()));
+
+    wnd.Resize(Extent(200, 200));
+    BOOST_TEST(wnd.GetPos() == DrawPoint(renderSize - wnd.GetSize()));
+
+    wnd.Resize(Extent(100, 100));
+    BOOST_TEST(wnd.GetPos() == DrawPoint(renderSize - wnd.GetSize()));
+}
+
 BOOST_AUTO_TEST_SUITE_END()