A few years back, callbacks were the only way we could achieve asynchronous code execution in JavaScript. There were few problems with callbacks and the most noticeable one was "Callback hell".
With ES6, Promises were introduced as a solution to those problems. And finally, the async/await
Amazon Web Services (AWS) is a cloud computing provider with a number of extremely popular services. Ever since their launch back in 2006, they've become a key player in the development and deployment of major enterprise applications. Their services are scalable, flexible, and groundbreaking in many aspects, while keeping
In this article, we will discuss how to integrate PostgreSQL with Node.js.
In order to better follow this article, we'd recommend that you have prior experience using Node.js and SQL statements. We will be using simple javascript ES6 syntax in this article.
There are a few different
Sequelize is a popular ORM created for Node.js, and in this tutorial we'll be using it to build a CRUD API to manage notes.
Interacting with databases is a common task for backend applications. This was typically done via raw SQL queries, which can be difficult to construct,
If you wanted to select elements from an array or object before the ES2015 update to JavaScript, you would have to individually select them or use a loop.
The ES2015 specification introduced the destructuring assignment, a quicker way to retrieve array elements or object properties into variables.
In this
Test "mocks" are objects that replace real objects while simulating their functions. A mock also has expectations about how the functions being tested will be used.
In some unit test cases we may want to combine the functionality of spies, to observe a method's behavior under call,
JavaScript's Fetch API allows us to send HTTP requests. It's been a standard part of JavaScript since ECMAScript 2015 (commonly known as ES6) was introduced and uses Promises.
This article will first show you how requests were made with vanilla JavaScript before the Fetch API was developed. We will
In software testing, a "spy" records how a function is used when it is tested. This includes how many times it was called, whether it was called with the correct arguments, and what was returned.
While tests are primarily used to validate the output of a function,
