assertFalse(markus.getAllContextNodes().hasNext()); try { markus.getAllContextNodes().next(); fail(); } catch (NoSuchElementException ex) { } assertFalse(markus.getAllLeafContextNodes().hasNext()); try { markus.getAllLeafContextNodes().next(); fail(); } catch (NoSuchElementException ex) { } assertEquals(markus.getContextNodeCount(), 0); assertEquals(markus.getAllContextNodeCount(), 0);