jdomWriter.closeEmptyTag();
assertEquals("myns1", jdomWriter.getNamespacePrefix(2));
assertEquals("myns2", jdomWriter.getNamespacePrefix(3));
jdomWriter.endTag(0, "element1");
assertNull("unexpected prefix defined", jdomWriter.getNamespacePrefix(2));
assertNull("unexpected prefix defined", jdomWriter.getNamespacePrefix(3));
}