@Test
    public void basic() {
        DummySpanNode node = DummySpanNode.INSTANCE;
        assertEquals(0, node.getFrom());
        assertEquals(0, node.getTo());
        assertEquals(0, node.getLength());
        assertNull(node.getText("baba"));
        assertTrue(node.isLeafNode());
        assertFalse(node.childIterator().hasNext());
        assertFalse(node.childIterator().hasPrevious());
        assertFalse(node.childIteratorRecursive().hasNext());
        assertFalse(node.childIteratorRecursive().hasPrevious());
    }
@author <a href="mailto:einarmr@yahoo-inc.com">Einar M R Rosenvinge</a>
@since 5.1.10
document/src/test/java/com/yahoo/document/annotation/DummySpanNodeTestCase.java