@Test
	public void testCloseProgram() throws Exception {

		runSwing(() -> {
			ProgramManager pm = tool.getService(ProgramManager.class);
			pm.closeProgram();
		});
		GTreeNode rootNode = tree.getModelRoot();
		assertEquals(1, rootNode.getChildCount());
	}
Tests for managing categories through the data manager plugin and tests for
actions being enabled when a node is selected.
Ghidra/Features/Base/src/test.slow/java/ghidra/app/plugin/core/datamgr/DataTypeManagerPluginTest.java