// Verify that each project node uses the correct schedule node.
assertEquals(2, root.getChildCount());
ProjectNode proj1 = (ProjectNode) root.getChildAt(0);
ProjectNode proj2 = (ProjectNode) root.getChildAt(1);
tree.expandPath(new TreePath(proj1.getPath()));
assertEquals(1, proj1.getChildCount());
tree.expandPath(new TreePath(proj2.getPath()));
assertEquals(1, proj2.getChildCount());