API mount shallow 挂载选项 context slots stubs mocks localVue attachToDocument attrs listeners provide 其它选项 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 组件 TransitionStub TransitionGroupStub 选择器 createLocalVue 配置