@Test(expected= WrongReferenceAttributeValueException.class)
public void testCheckAttributeSemanticsEmptyAttribute() throws Exception {

	System.out.println("testCheckAttributeSemanticsEmptyAttribute()");
	Attribute attributeToCheck = new Attribute();
	//when(session.getPerunBl().getAttributesManagerBl().getAttribute(any(PerunSession.class), any(Facility.class), anyString())).thenReturn(listOfShells);
	classInstance.checkAttributeSemantics(session, new Resource(), attributeToCheck);
	fail("Attribute without value has not thrown WrongAttributeSemanticsException.");
}