API mount shallow Mounting Options context slots stubs mocks localVue attachToDocument attrs listeners provide other options Wrapper attributes classes contains emitted emittedByOrder exists destroy find findAll hasAttribute hasClass hasProp html is isEmpty isVueInstance name props setData setMethods setProps text trigger update visible WrapperArray at contains exists destroy filter is isEmpty isVueInstance setData setMethods setProps trigger update visible components TransitionStub TransitionGroupStub Selectors createLocalVue config