" </gml:TimePeriod> " +
" </fes:OverlappedBy> " +
"</fes:Filter>";
buildDocument(xml);
OverlappedBy overlappedBy = (OverlappedBy) parse();
assertNotNull(overlappedBy);
assertTrue(overlappedBy.getExpression1() instanceof PropertyName);
assertEquals("timeInstanceAttribute", ((PropertyName)overlappedBy.getExpression1()).getPropertyName());
assertTrue(overlappedBy.getExpression2() instanceof Literal);
assertTrue(overlappedBy.getExpression2().evaluate(null) instanceof Period);
}