打字稿，单元测试：正确键入以使用redux-mock-store中的store.dispatch调度Thunk

Question

有什么方法可以从redux-mock-store创建的商店中正确调度Thunk吗？现在我被迫使用任何类型断言

store.dispatch<any>(getCommissions());

如dispatch预期的那样提供简单的操作

[ts]
Argument of type '(dispatch: ThunkDispatch<IRootState, undefined, 
AnyAction>, getState: () => IRootState) => void' is not assignable to parameter of type 'AnyAction'.
Property 'type' is missing in type '(dispatch: ThunkDispatch<IRootState, undefined, AnyAction>, getState: () => IRootState) => void'.

的代码片段 getCommisions()

export function getCommissions() {
  return (dispatch: ThunkDispatch<IRootState, undefined, AnyAction>, getState: () => IRootState) => { ... }

Answer 1

createMockStore默认导出的函数redux-mock-store接受通用类型<S, DispatchExts>，其中S是您的Redux状态的定义，DispatchExts是Dispatch任何添加的Redux中间件的（或单个）附加签名的并集。

因此，设置此方式是导入ThunkDispatch的redux-thunk，它接受它自己的通用参数<State, ExtraArgument, Action>，并把它传递的DispatchExts参数createMockStore。

这是一个简短的示例：

import { AnyAction } from 'redux'; // Or your own Action definition
import createMockStore from 'redux-mock-store';
import thunk, { ThunkDispatch } from 'redux-thunk';

import { ApplicationState } from '../your/definitions';

type DispatchExts = ThunkDispatch<ApplicationState, void, AnyAction>;

const middleware = [thunk];
const mockStore = createMockStore<ApplicationState, DispatchExts>(middleware);

const store = mockStore();

希望对您有帮助！

我当前的版本： redux 4.0.0 redux-thunk 2.3.0 redux-mock-store 1.5.3 typescript 2.9.2

ThunkDispatch定义https://github.com/reduxjs/redux-thunk/blob/master/index.d.ts

createMockStore定义https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/redux-mock-store/index.d.ts

Answer 2

对于configureMockStore使用，解决方案几乎与@nickpassarella 的答案完全相同。

import configureMockStore from 'redux-mock-store';
import thunk, { ThunkDispatch } from 'redux-thunk';
import { MyState, MyActions } from './my-types';

type DispatchExts = ThunkDispatch<MyState, undefined, MyActions>;

const middlewares = [thunk];
const mockStore = configureMockStore<MyState, DispatchExts>(middlewares);

const store = mockStore();

两个示例都使用redux 4.0.1 redux-thunk 2.3.0 redux-mock-store 1.5.3和typescript 3.5.3