ProjectNode project = (ProjectNode) root.getChildAt(1);
assertEquals("a", pluginA.getAttributeValue("name"));
assertEquals("b", pluginA.getAttributeValue("classname"));
tree.expandPath(new TreePath(project.getPath()));
assertEquals(1, project.getChildCount());
PluginPluginNode pluginC = (PluginPluginNode) project.getChildAt(0);
assertEquals("c", pluginC.getAttributeValue("name"));
assertEquals("d", pluginC.getAttributeValue("classname"));