酶测试认证高阶组件(HOC)

这里的"棘手"部分是你的HOC返回一个连接组件,这使得测试更难,因为你有两层浅层渲染(连接组件和实际组件),你必须模拟redux存储.

相反,您可以定义AuthenticatedComponent前期并将其导出为命名导出.你可以独立测试它,connect就像测试每个其他组件一样:

export class AuthenticatedComponent extends React.Component {
  static contextTypes = {
    router: React.PropTypes.object,
  }

  static propTypes = {
    authenticated: React.PropTypes.bool,
    composedComponent: React.PropTypes.any.isRequired,
  }

  componentWillMount() {
    if (!this.props.authenticated) this.context.router.push('/');
  }

  componentWillUpdate(nextProps) {
    if (!nextProps.authenticated) this.context.router.push('/');
  }

  render() {
    const ComposedComponent = this.props.composedComponent;
    return (
      

        { this.props.authenticated ?  : null }
      
    );
  }
}

export default function RequireAuth(ComposedComponent) {
  const mapStateToProps = () => {
    const selectIsAuthenticated = makeSelectAuthenticated();
    return (state) => ({
      authenticated: selectIsAuthenticated(state),
      composedComponent: ComposedComponent,
    });
  };

  return connect(mapStateToProps)(AuthenticatedComponent);
}

示例测试:

import React from 'react';
import { shallow, mount } from 'enzyme';
import { Provider } from 'react-redux';
import configureStore from 'redux-mock-store';
import RequireAuth, { AuthenticatedComponent } from '../';

const Component = () => 
;
Component.displayName = 'CustomComponent';

const mockStore = configureStore([]);

describe.only('HOC', () => {
  const RequireAuthComponent = RequireAuth(Component);
  const context = { router: { push: jest.fn() } };
  const wrapper = mount(
    
      
    ,
    {
      context,
      childContextTypes: { router: React.PropTypes.object.isRequired },
    }
  );
  it('should return a component', () => {
    expect(wrapper.find('Connect(AuthenticatedComponent)')).toHaveLength(1);
  });
  it('should pass correct props', () => {
    expect(wrapper.find('AuthenticatedComponent').props()).toEqual(
      expect.objectContaining({
        authenticated: false,
        composedComponent: Component,
      })
    );
  });
});

describe('rendering', () => {
  describe('is authenticated', () => {
    const wrapper = shallow(
      ,
      { context: { router: { push: jest.fn() } } }
    );
    it('should render the passed component', () => {
      expect(wrapper.find('CustomComponent')).toHaveLength(1);
    });
  });
  describe('is not authenticated', () => {
    const wrapper = shallow(
      ,
      { context: { router: { push: jest.fn() } } }
    );
    it('should not render the passed component', () => {
      expect(wrapper.find('CustomComponent')).toHaveLength(0);
    });
  });
});