A jest snippet for testing a reducer

Jest-Test-Reducer-Snippet

import $reducerName$ from './$reducerName$';
import * as $actionName$ from '../actions/$actionName$';

//A reducer should return the new state after applying the action to the previous state
describe('$reducerName$ Reducer', () => {
    const initialState = {
        id: '',
        name: 'test'
    };
    const templates = [{
            id: 3,
            name: "test1",

        },
        {
            id: 4,
            name: "test2",

        }
    ];

    const updatedState = {
        id: 3,
        name: "test1",

    };

    it('Should return an initial state', () => {
        expect(nameOfReducer(undefined, {})).toEqual(initialState);
    });

    it('Should handle ACTION_NAME', () => {
        const action = $reducerName$.actionName(templates);
        const newState = nameOfReducer(initialState, action);
        expect(newState).toEqual(updatedState);
    });

    it('Should handle ACTION_NAME', () => {
        const newText = "New Text";
        const updateState = {

        };
        const action = $reducerName$.actionName(newText);
        const newState = nameOfReducer(initialState, action);
        expect(newState).toEqual(updateState);
    });
    //
    it('Should handle ACTION_NAME', () => {
        const response = {
            id: 1,
        };
        const addState = {
            id: 1,
            name: 'test2',
            info: "more information etc"
        };
        const action = $reducerName$.actionName(response);
        const newState = nameOfReducer(initialState, action);
        expect(newState).toEqual(addState);
    });

    it('Should handle UACTION_NAME', () => {
        const response = {
            id: 1,
        };
        const updatedState = {
            id: 1,
            name: 'test2',
            info: "more information etc"
        };
        const action = $reducerName$.actionName(response);
        const newState = nameOfReducer(initialState, action);
        expect(newState).toEqual(updatedState);
    });

    it('Should return default state', () => {
        const action = { type: 'UNSPECIFIED_ACTION', blah: 'blah' };
        const newState = nameOfReducer({}, action);
        expect(newState).toEqual({});

    });
});