Compilation of snippets for testing reducers in React with Redux.

ComponentReducerTest.tsx

import { IState } from './types';
import { MyReducer } from './path/to/my/reducer';
import { expect, assert } from 'chai';

describe("DashBoardTodoListStateReducer", () =>
{
    var defaultState:IState

    beforeEach(() => {
        defaultState = MyReducer(undefined, undefined);
    });

    it("Should set List.", () =>
    {
        var value = [];
        var state = MyReducer(defaultState, {type:"MyAction", Value:value});
        
        chai.assert.equal(state.List, value, "List was not set in the reducer.");
        chai.assert.notEqual(defaultState, state, "Mutable state detected!")
    });
});