//the ones that are ignorable by the renderer
assertNotNull(forceRenderingError(new TransformException("fake transform exception")));
assertNotNull(forceRenderingError(new NoninvertibleTransformException("fake non invertible exception")));
assertNotNull(forceRenderingError(new IllegalAttributeException("non illegal attribute exception")));
assertNotNull(forceRenderingError(new FactoryException("fake factory exception")));
//any other one should make the map producer fail
try{
forceRenderingError(new RuntimeException("fake runtime exception"));
fail("Expected WMSException");