reducer-test-utils

Reducer-Test-Utils

Utilities for testing reducer functions

pipeActions

import { pipeActions } from "reducer-test-utils";

Concatenates multiple reducer actions and lets you test desired states.

Usage:

import { pipeActions } from "reducer-test-utils";
import { myReducer, Action } from './myReducer'

describe("test my reducer function", () => {
  it("works with multiple actions", () => {
    const initialState = 1;

    pipeActions(
      myReducer,
      { type: Action.ADD_1 },
      (state) => expect(state).toEqual(2),
      { type: Action.ADD_N, payload: 3 },
      { type: Action.ADD_1 },
      (state) => expect(state).toEqual(6),
      { type: Action.SUB_2 },
      (state) => expect(state).toMatchSnapshot(),
    )(initialState);
  });
});