@Test
public void detachNoScope() {
// given
prepAttach();
ui.attach();
// when
ui.detach();
// then
// no exception
}
@Test
public void detachScopeNotNull() {
// given
prepAttach();
ui.attach();
ui.setScope(uiScope);
ui.setInstanceKey(uiKey);
// when
ui.detach();
// then
verify(uiScope).releaseScope(ui.getInstanceKey());
verify(broadcaster).unregister(Broadcaster.ALL_MESSAGES, ui);
}