getGeoServer().reload();
assertNull(catalog.getLayerByName(layerName));
CatalogConfiguration config = GeoServerExtensions.bean(CatalogConfiguration.class);
assertNull(config.getTileLayer(layerName));
try {
mediator.getTileLayerByName(layerName);
fail("Expected IAE");
} catch (IllegalArgumentException e) {
assertTrue(true);