junit5 VS jest

To make the above check work we need to wrap it in JUnit test:

Java / JUnit

Next, you need to install a testing framework that will be used for performing unit testing in your project. Several testing frameworks are available depending on the programming language used to create an application. For example, JUnit is commonly used for Java apps, pytest for Python apps, NUnit for .NET apps, Jest for JavaScript apps, and so on. We’ll use the Jest framework for this tutorial since we are using JavaScript.

This repository provides a BuildImageTest that uses the buildpack to create a native image. It then tests the native image, using Testcontainers and JUnit. Building the native image with AOT processing, as part of a test, takes minutes not seconds, and should not be part of normal "inner loop" development. So the BuildImageTest is in a separate sourceSet and can be executed independently. This is a very powerful pattern, that I'm just getting started with. I would love to hear your thoughts on this pattern or other alternatives to it.

To get started with testing, search for a popular testing framework for your programming language. PHP has PHPUnit, for example. Java has JUnit. Flutter apps use Flutter Driver. No matter your language or framework, there is a testing framework that will work for your app.

Another library which may be of use to you once you've gotten to grips with the basics of Java is JUnit. JUnit provides functionality for unit testing, allowing you to more easily see if your code is working as expected/if you've accidentally broken anything, via letting you write tests that can check if your code is behaving as expected or not.

Official Website : https://junit.org/

In my last episode (https://youtu.be/cs2Wu9Co-2s) I said that we shouldn't use JUnit @BeforeEach to setUp test fields. Christoph Sturm (https://twitter.com/globalo) pointed out that there is an, erm, feature of JUnit 5 that means that we sometimes have to use @BeforeEach methods to initialise resources if we want them to be released in @AfterEach. The bug report is here https://github.com/junit-team/junit5/issues/1358 With or without this feature, we probably should use @BeforeEach to run code that will allocate non-memory resources that we need to free in @AfterEach, if only for symmetry. I suppose that also applies to any side-effects that we need to be reverted and that are not confined to the state of the test fixture.

Testing tools on the JVM stopped using reflection about twenty years ago, they all use annotations these days (e.g. https://testng.org, https://junit.org). Rust has annotations too, obviously.

Testcontainers is a Java library that supports JUnit tests providing lightweight instances of anything that we can run in a Docker container.

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.

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.