@Test
public void testInvalidFill() throws Exception {

        Style s = getStyle(DENSITY_FILL);
        AreaSymbolizer as = (AreaSymbolizer) s.getRules().get(0).getCompositeSymbolizer()
                .getSymbolizerList().get(0);
        SymbolizerTypeAnalyzer sta = new SymbolizerTypeAnalyzer();
        assertFalse(sta.validateFill(as.getFill()));
}