@Test
	public void testDnDCopyFrag2FolderInvalid() throws Exception {
		// drag/copy a fragment onto a folder that already contains the
		// fragment.
		// verify that there is no valid drop target.

		//setup scenario
		copyFolderOrFragment(".debug_data", "Not Real Blocks");

		ProgramNode debugNode = root.getChild(".debug_data");
		ProgramNode nrbNode = root.getChild("Not Real Blocks");

		assertDropSiteInvalid(nrbNode, debugNode);
	}
Tests for drag/drop/reorder for copy and move in the program tree.
Ghidra/Features/Base/src/test.slow/java/ghidra/app/plugin/core/programtree/ProgramTreePlugin3Test.java