API mount shallow マウンティングオプション context slots stubs mocks localVue attachToDocument attrs listeners provide その他のオプション Wrapper attributes classes contains emitted emittedByOrder exists destroy find findAll html is isEmpty isVueInstance name props setData setMethods setProps text trigger update visible WrapperArray at contains exists destroy is isEmpty isVueInstance setData setMethods setProps trigger update visible コンポーネント TransitionStub TransitionGroupStub セレクタ createLocalVue config