测试函数是否被称为 react 和 enzyme

Test if function is called react and enzyme

我正在尝试测试我的 React 组件中的一种方法。单击按钮后会调用它,因此我可以使用酶

进行模拟
 it('clone should call handleCloneClick when clicked', () => {
        const cloneButton = wrapper.find('#clone-btn');
        cloneButton.simulate('click');
 });

我的组件方法在这里:

_handleCloneClick(event) {
    event.preventDefault();
    event.stopPropagation();

    this.props.handleClone(this.props.user.id);
}

当用户点击模拟中的按钮时,_handleCloneClick 被调用,我该如何测试它是否被成功调用?

有两种选择,要么在渲染组件之前监视组件原型的 _handleCloneClick

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>);
  }
}

在你的测试中:

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一个 spy 并在之后调用 wrapper.update()

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
});