有两种选择，要么
_handleCloneClick在呈现组件之前就监视组件的原型，要么：
export default class cloneButton extends Component { constructor(...args) { super(...args); this. _handleCloneClick = this. _handleCloneClick.bind(this); } _handleCloneClick() { event.preventDefault(); event.stopPropagation(); this.props.handleClone(this.props.user.id); } render() { return (<button onClick={this. _handleCloneClick}>Clone</button>); }}在您的测试中：
it('clone should call handleCloneClick when clicked', () => { sinon.spy(cloneButton.prototype, '_handleCloneClick'); const wrapper = mount(<cloneButton/>); wrapper.find('#clone-btn').simulate('click'); expect(spy).toHaveBeenCalled() //adept assertion to the tool you use});或者，您可以尝试在渲染组件后设置间谍并
wrapper.update()随后调用：
it('clone should call handleCloneClick when clicked', () => { const wrapper = mount(<cloneButton/>); sinon.spy(wrapper.instance(), "_handleCloneClick"); wrapper.update(); wrapper.find('#clone-btn').simulate('click'); expect(spy).toHaveBeenCalled() //adept assertion to the tool you use});
