Add a test for nested BALMLayouts.

src/tests/libs/alm/Jamfile

@@ -58,3 +58,10 @@ Application ALMBadLayout :
 	:
 	be libalm.so $(TARGET_LIBSTDC++)
 ;
+
+
+Application ALMNestedLayout :
+	NestedLayout.cpp
+	:
+	be libalm.so $(TARGET_LIBSTDC++)
+;

src/tests/libs/alm/NestedLayout.cpp

@@ -0,0 +1,70 @@
+/*
+ * Copyright 2007-2008, Christof Lutteroth, lutteroth@cs.auckland.ac.nz
+ * Copyright 2007-2008, James Kim, jkim202@ec.auckland.ac.nz
+ * Copyright 2010, Clemens Zeidler <haiku@clemens-zeidler.de>
+ * Copyright 2012, Haiku, Inc. 
+ * Distributed under the terms of the MIT License.
+ */
+
+#include <Application.h>
+#include <Button.h>
+#include <LayoutBuilder.h>
+#include <List.h>
+#include <Window.h>
+
+// include this for ALM
+#include "ALMLayout.h"
+
+
+class NestedLayoutWindow : public BWindow {
+public:
+	NestedLayoutWindow(BRect frame) 
+		:
+		BWindow(frame, "ALM Nested Layout", B_TITLED_WINDOW,
+			B_QUIT_ON_WINDOW_CLOSE | B_AUTO_UPDATE_SIZE_LIMITS)
+	{
+		button1 = new BButton("There should be space above this button!");
+
+		fLayout = new BALMLayout();
+		BLayoutBuilder::Group<>(this, B_VERTICAL, 0)
+			.SetInsets(0)
+			.AddStrut(30)
+			.Add(fLayout);
+
+		// add an area containing the button
+		// use the borders of the layout as the borders for the area
+		fLayout->AddView(button1, fLayout->Left(), fLayout->Top(),
+			fLayout->Right(), fLayout->Bottom());
+		button1->SetExplicitMinSize(BSize(0, 50));
+		button1->SetExplicitMaxSize(BSize(500, 500));
+		button1->SetExplicitAlignment(BAlignment(B_ALIGN_USE_FULL_WIDTH,
+			B_ALIGN_USE_FULL_HEIGHT));
+	}
+	
+private:
+	BALMLayout* fLayout;
+	BButton* button1;
+};
+
+
+class NestedLayout : public BApplication {
+public:
+	NestedLayout() 
+		:
+		BApplication("application/x-vnd.haiku.NestedLayout") 
+	{
+		BRect frameRect;
+		frameRect.Set(100, 100, 300, 300);
+		NestedLayoutWindow* window = new NestedLayoutWindow(frameRect);
+		window->Show();
+	}
+};
+
+
+int
+main()
+{
+	NestedLayout app;
+	app.Run();
+	return 0;
+}