README.md

This project was bootstrapped with Create React App.

Coffee Store App

The App uses React and Redux

This application is an implementation of the Ice Cream Store App Demo by Thomas Tuts as part of the Redux in Motion Course on Manning Publications

Coure Objectives

• The fundamentals of working with Redux
• Writing maintainable code
• Using Redux in the real-world
• Handling asynchronous data
• A test-first approach to web development
• Combining React and Redux

Course Summary

Running Tests Using Jest

• running a test using the it function

it('test name here', function() {
    expect(true).toEqual(true);
});

• running multiple tests

describe('test group name', function() {
    it('first test', function() {
        expect(true).toEqual(true);
    });
    it('second test', function() {
        expect(true).toEqual(true);
    });    
});

Actions

• basic action with an optional payload

const doSomething = (payloadValue = 'defaultPayloadValue') => ({
    type: 'DO_SOMETHING',
    payload: payloadValue
});

Reducers

• reducer is a pure function that doesn't mutate the initial state

const initialState = {
    count: 0
}

function reducer(state = initialState, action) {
    switch (action.type) {
        case 'DO_SOMETHING',
            return {
                ...state,
                count: state.count + action.payload
            };
    }
}
});

Testing Reducers

import { action, reducer } from './dir/to/them';

describe('Counter', function () {
    it('should have an initial state', function () {
        const result = reducer();
        expect(result.count).toEqual(0);
    })
})

describe('Counter', function () {
    it('should increase by one', function () {
        const result = reducer();
        const action = actionCreator()
        expect(result.count).toEqual(1);
    })
})
});