@Test
public void testResetAllClassHandlers() {

    handler.setGroup("some", IndexOutOfBoundsException.class, ArrayIndexOutOfBoundsException.class);
    handler.setHandlerForGroup("some", CycleErrorHandlers.rethrow("Octothorpe and Umlaut are friends."));
    assertThat(handler.getHandlers()).hasSize(2);
    handler.resetAllClassHandlers();
    assertThat(handler.getHandlers()).hasSize(0);
}