mock-fs
jest
mock-fs | jest | |
---|---|---|
2 | 474 | |
896 | 43,581 | |
- | 0.3% | |
0.0 | 9.5 | |
7 months ago | 7 days ago | |
JavaScript | TypeScript | |
GNU General Public License v3.0 or later | MIT License |
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Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
mock-fs
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How to Write File-Based Tests With Real Files
A lot of my past projects in some way had to do with file access. I started to test with mocking libraries like mock-fs, but soon recognized that they do not work for all cases, and sometimes you are using third party libraries internally that you cannot mock easily. So I thought of a different solution and the one I'm using right now for most projects actually uses real files.
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Unit testing Node.js fs with mock-fs
In this post I'll be showing you how you can use mock-fs to easily unit test your Node.js scripts.
jest
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How to Add Firebase Authentication To Your NodeJS App
There are several testing approaches you can take to ascertain the functionality of the auth API. One way would be to automate the testing using unit tests with tools like Jest and Supertest. Alternatively, you can make use of API clients like Postman or the Thunder Client VS Code extension to test the API.
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What is an Abstract Syntax Tree in Programming?
GitHub | Website
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Top 10 Tools Every React Developer Needs in 2024
Jest
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API Testing with Clerk and Express
you have selected a testing framework. In my case, it's Jest with Supertest
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JS Toolbox 2024: Bundlers and Test Frameworks
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.
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Testing library for Node.js and React
Jest (https://jestjs.io/)
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Unit Testing Expo Apps With Jest
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
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Easily create mock data for unit tests 🧪
Note: I will be using Jest as testing framework throughout the examples.
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Painless CLI integration testing
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!
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What is integration testing in UI/Front End?
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.
What are some alternatives?
fs-extra - Node.js: extra methods for the fs object like copy(), remove(), mkdirs()
tap - Test Anything Protocol tools for node
mocha - ☕️ simple, flexible, fun javascript test framework for node.js & the browser
vitest - Next generation testing framework powered by Vite.
output-files - Output a tree of files and directories by providing an object. Especially useful for testing with real files.
Cucumber.js - Cucumber for JavaScript
with-local-tmp-dir - Creates a temporary folder inside cwd, cds inside the folder, runs a function, and removes the folder. Especially useful for testing.
Sinon.JS - Test spies, stubs and mocks for JavaScript.
endent - ⬅️ An ES6 string tag makes indentation better
nyc - the Istanbul command line interface
WebdriverIO - Next-gen browser and mobile automation test framework for Node.js
ava - Node.js test runner that lets you develop with confidence 🚀