final String predicate = "2006-11-30T01:00:00Z DURING 2006-11-30T00:30:00Z/2006-11-30T01:30:00Z ";
Filter resultFilter = CompilerUtil.parseFilter(this.language, predicate);
Assert.assertTrue( resultFilter instanceof During);
During lessFilter = (During) resultFilter;
Literal expr1 = (Literal)lessFilter.getExpression1();
Assert.assertTrue(expr1.getValue() instanceof Date);
Literal expr2 = (Literal) lessFilter.getExpression2();
Assert.assertTrue(expr2.getValue() instanceof Period);
Assert.assertTrue(resultFilter.evaluate(null));
}