### Question:
MergedCssBuilder extends MergedResourceBuilder { public MergedCssBuilder setPath(String path) { return (MergedCssBuilder) super.setPath(path); } MergedCssBuilder(); MergedCssBuilder setPath(String path); MergedCssBuilder setCssMedia(String media); MergedCssBuilder addCss(Class<?> scope, String path); MergedCssBuilder addCss(ResourceReference ref);  }### Answer:
@Test(expected=IllegalStateException.class) public void testMissingResourceThrowsException() { MergedCssBuilder b = new MergedCssBuilder(); b.setPath("/styles/all.css"); b.install(new WicketTester().getApplication()); }