final String newLayerName = "modifiedLayerName";
BlobStoreListener listener = EasyMock.createNiceMock(BlobStoreListener.class);
listener.layerRenamed(EasyMock.eq(layerName), EasyMock.eq(newLayerName));
EasyMock.replay(listener);
fbs.addListener(listener);
boolean renamed = fbs.rename(layerName, newLayerName);
assertTrue(renamed);
EasyMock.verify(listener);