DefinitelyTyped/types/redux-testkit/index.d.ts

// Type definitions for redux-testkit 1.0
// Project: https://github.com/wix/redux-testkit#readme
// Definitions by: Andrey Kizimov <https://github.com/Bookler96>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
// TypeScript Version: 2.3

import * as Redux from 'redux';
import { ThunkAction } from 'redux-thunk';

export interface ReducerTestkit {
	expect: (action: Redux.Action) => {
		toReturnState(expected: any): void,
		toStayTheSame(): void;
		toChangeInState(expectedChanges: any): void;
	};
	execute(action: Redux.Action): any; // state
}

export interface ThunkTestkit {
	execute(...args: any[]): any;
}

export function Reducer(action: Redux.Reducer): ReducerTestkit & {
	withState(state: any): ReducerTestkit;
};

export function Selector(selector: (state: any, action: any) => any): {
	expect(state: any, ...args: any[]): {
		toReturn(expected: any): void;
	};
	execute(state: any, ...args: any[]): any;
};

export function Thunk(thunkFunc: ThunkAction<any, any, any, any>, extraArg?: any): ThunkTestkit & {
	withState(state: any): ThunkTestkit;
};

export namespace FlushThunks {
	function createMiddleware(): Redux.Middleware & {
		flush(): void;
		reset(): void;
	};
}