@Test(expected = WrongAttributeValueException.class)
public void testCheckDuplicates() throws Exception {

	System.out.println("testCheckDuplicates()");
	attributeToCheck.setValue(Lists.newArrayList("my@example.com", "aaa@bbb.com", "my@example.com"));
	classInstance.checkAttributeSyntax(session, group, resource, attributeToCheck);
}