CHap:4,5

 Chapter 4. Tidying Up

 File and Directory structure

    -Tối thiểu trong dự án phải có 2 file README.md và package.json.

    - Trong file README.md nên có road map cho cấu trúc file và thư mục trong dự án.

    - Nên đặt entry point một cách cụ thể chứ không nên đặt chung chung như index.js, server.js.

Using Git

- Học cách sử dụng Git để quản lý dự án.

- Thực hành với các lệnh git init, file .gitignore, ....

nmp Package

- Các npm Package được thêm vào dự án sẽ nằm trong thư mục node_module.

- Có thể mở xem và tìm hiểu nhưng không nên sửa code trong đó.

- 2 trong số các mục đích của tệp package.json là để mô tả dự án của bạn và liệt kê các thành phần phụ thuộc vào nó

Node Modules

-cú pháp để import module: 

     const express = require('express')

- Có thể tạo node module của riêng mình nhưng tuyệt đối không để nó vào trong thư mục node_module mặc định của dự án.

Chapter 5:

- Có 2 loại test lớn: kiểm thử đơn vị và kiểm thử tích hợp

- Framework test : Jest

     + Cài đặt jest: npm install --save-dev jest

     + Thêm comand line để chạy test, trong packages.json : "scripts": {"test": "jest"},

     + Chạy test : npm test 

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