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 hasAttribute hasClass hasProp hasStyle html is isEmpty isVueInstance name props setComputed setData setMethods setProps text trigger update WrapperArray at contains exists destroy hasStyle is isEmpty isVueInstance setComputed setData setMethods setProps trigger update コンポーネント TransitionStub TransitionGroupStub セレクタ createLocalVue config