}
public void testGetFeaturesWithArithmeticOpFilter() throws Exception {
FilterFactory ff = dataStore.getFilterFactory();
Subtract sub = ff.subtract(ff.property(aname("doubleProperty")), ff.literal(0.1));
PropertyIsEqualTo filter = ff.equals(ff.property(aname("intProperty")), sub);
//this test is very dependant on the specific database, some db's will round, some won't
// so just assert that something is returned
assertTrue(featureSource.getCount(new Query(null, filter)) > 0);