superagent VS jest

SuperAgent is a lightweight and flexible HTTP client that supports promises and callback-style syntax. It is known for its simplicity and ease of use.

You’re putting together an npm library that involves fetching data. There are many popular packages that can help you (axios, superagent, etc.) but in the spirit of not shipping bulky/redundant JS code to the browser, and the progress which browsers and JavaScript has made over the years, you try to use the platform whenever possible.

You are using Superagent and RSS parser to get the task done. Superagent and RSS parser both support callback and the Promises API (coming up next). If this code was written for the backend with Node.js, we wouldn't need the CORS proxy. It is needed for the frontend.

There is a part Api.fetchUser that is not explained, thus I don't quiet understand if that is something we need to handle with libraries like axios or superagent? or is that something else. And are saga effects like call, put etc.. equivalents of get, post? if so, why are they named that way? Essentially I am trying to figure out a correct way to perform a simple post call to my api at url example.com/sessions and pass it data like { email: 'email', password: 'password' }

Create your new project and install our lone requirement [superagent](https://www.npmjs.com/package/superagent), an HTTP client library to make HTTP requests in Node.js, by running:

SuperAgent (https://github.com/visionmedia/superagent)

Superagent is a great tool for testing API’s, you could use something like Postman, but combined with Jest you can accomplish a lot.

We will be using SuperAgent for making API requests, so let's add it to our dependency list. yarn add superagent Next, we will create a routes/__layout.svelte file, which will wrap around any of the routes in the directory.

Route tests are tests that actually call endpoints in the apis and tests for the happy path and sad paths. Supertest is the package for write route test. Supertest is built on superagent, which is an HTTP request library. So your Express app is actually called like if a user was making a request

superagent - HTTP request library.

GitHub | Website

Jest

you have selected a testing framework. In my case, it's Jest with Supertest

Jest, created and maintained by Facebook, is a JavaScript testing framework with a focus on simplicity. It is often recognized for its zero-configuration setup and seamless integration, especially with React applications, making it a favored choice for developers in both small-scale projects and large enterprise applications.

Jest (https://jestjs.io/)

console.error Jest encountered an unexpected token Jest failed to parse a file. This happens e.g. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax. Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration. By default "node\_modules" folder is ignored by transformers. Here's what you can do: • If you are trying to use ECMAScript Modules, see https://jestjs.io/docs/ecmascript-modules for how to enable it. • If you are trying to use TypeScript, see https://jestjs.io/docs/getting-started#using-typescript • To have some of your "node\_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config. • If you need a custom transformation specify a "transform" option in your config. • If you simply want to mock your non-JS modules (e.g. binary assets) you can stub them out with the "moduleNameMapper" config option. You'll find more details and examples of these config options in the docs: https://jestjs.io/docs/configuration For information about custom transformations, see: https://jestjs.io/docs/code-transformation

Note: I will be using Jest as testing framework throughout the examples.

We use Jest Framework for testing. Jest is not a dogma, and, of course, in its place can be any other test runner, such as Mocha or Ava. Let's focus on tests. I'll provide a short example because I don’t want to waste your time. You can find the full version here. It's crucial to read the comments in the code below. Let's go!

Jest has long been my favorite got to test runner when it comes to UI unit and integration testing. With tools like React Testing Library (Testing Library framework for React) you get the benefit of very easy to write and maintain tests, as well as a quick and efficient way to run our tests.

Jest is a well-regarded JavaScript testing framework primarily designed for React applications, although its utility extends to projects using Babel, JavaScript, Node, Angular, and Vue. Created by Facebook, Jest emphasizes ensuring the correctness of JavaScript codebases. It allows developers to write tests with a familiar, feature-rich API, making the testing process swift and enjoyable​​.