@Test
public void testEnviroment() {
final FilterFactory ff = CommonFactoryFinder.getFilterFactory(null);
EnvFunction.setLocalValues(Collections.singletonMap("myParam", (Object) 23));
final DummyRasterMapProducer producer = new DummyRasterMapProducer() {
@Override
public WebMap produceMap(WMSMapContent ctx) throws ServiceException, IOException {
assertEquals(23, ff.function("env", ff.literal("myParam")).evaluate(null));
assertEquals(10, ff.function("env", ff.literal("otherParam"), ff.literal(10))
.evaluate(null));