Question

背景在线测试react-redux高阶组件有很多例子，例如：使用connect（）反应组件。但是，它们都在ES6中。我了解结构并能够在这些文档或示例的帮助下运行测试。

问题当我尝试使用JS代码并将其转换为Typescritpt时，我开始遇到类型问题。不确定如何在打字稿

中完成

我尝试测试的组件是AspNetCore React-Redux yoman脚手架中的Counter组件

Counter.tsx

import * as React from 'react';
import { Link, RouteComponentProps } from 'react-router-dom';
import { connect } from 'react-redux';
import { ApplicationState }  from '../store';
import * as CounterStore from '../store/Counter';
import * as WeatherForecasts from '../store/WeatherForecasts';

type CounterProps =
     CounterStore.CounterState
     & typeof CounterStore.actionCreators
     & RouteComponentProps<{}>;

export class Counter extends React.Component<CounterProps, {}> {
    public render() {
    return <div>
        <h1>Counter</h1>

        <p>This is a simple example of a React component.</p>

        <p>Current count: <strong>{ this.props.count }</strong></p>

        <button onClick={
        () => { this.props.increment() }
        }>Increment</button>
    </div>;
    }
}

export default connect(
    (state: ApplicationState) => state.counter,
CounterStore.actionCreators                 
)(Counter) as typeof Counter;

Counter.spec.js

import { Counter} from '../../ClientApp/components/Counter;
import * as Provider from 'react-redux';
import configureMockStore from 'redux-mock-store';
import * as store from '../../ClientApp/store';
import { shallow, mount } from 'enzyme';

declare var describe, beforeEach, it, expect, state, stub;

describe('Counter', () => {
    let wrapper;

    beforeEach(() => {
        wrapper = shallow(<Provider store={store}>
             <Counter />
        </Provider>
    )
});

    it('render Counter', () => {
    expect(wrapper.length).toEqual(1)
    });
});

错误消息

[ts] JSX element type 'Provider' does not have any construct or call signatures.
[ts] 'React' refers to a UMD global, but the current file is a module. Consider adding an import instead
[ts]
Type '{}' is not assignable to type 'IntrinsicAttributes &  IntrinsicClassAttributes<Login> & Readonly<{ children?: ReactNode; }> & Rea...'.
Type '{}' is not assignable to type 'Readonly<UserProps>'.
    Property 'loggedIn' is missing in type '{}'.

问题

如何摆脱这些错误消息

Answer 1

您忘记了在规范文件中导入React：

import * as React from 'react' // -------------------------------> THIS LINE
import { Counter} from '../../ClientApp/components/Counter;
import * as Provider from 'react-redux';
import configureMockStore from 'redux-mock-store';
import * as store from '../../ClientApp/store';
import { shallow, mount } from 'enzyme';

declare var describe, beforeEach, it, expect, state, stub;

describe('Counter', () => {
    let wrapper;

    beforeEach(() => {
        wrapper = shallow(<Provider store={store}>
             <Counter />
        </Provider>
    )
});

    it('render Counter', () => {
    expect(wrapper.length).toEqual(1)
    });
});

酶Jest React Redux Connected Component in Typescript

1 个答案: