caniemail VS mocha

Can I email? (https://www.caniemail.com/) by Tilt Studio Yes you can unless you won't.

Another client to test for is Google Mail, which can be done with a Gmail.com account. And Apple Mail, on any Apple device. Apple Mail provides the best email rendering so you don't even really need to worry about it much if you're covering the other two. But these three make up the main ones you should test for. And for checking compatibility of specific code, caniemail.com is an essential tool to use.

To our dismay, major platforms like Gmail do not support flexbox align-items, and there are no plans to include support for SVG (and don't get me started with outlook's desktop app, where even basic styles go very wrong). You can refer to an illustrative guide of what you can or can't do across email providers on Caniemail.

Check out https://www.caniemail.com to see what tags are supported and the email client options to watch for.

Be careful when using CSS, some properties like flex ⚠️ are not supported by all email clients. You can check this website to see which properties are supported by which email clients. Another solution is to use a CSS framework that will do the hard compatibility work for you. I use MJML, in my in-depth article about SES, I explain how to use it to create responsive emails.

Using something like Vitest, Jest, or Mocha didn't work because:

MochaJS is a feature-rich JavaScript test framework running on Node.js, making it a popular choice for both backend and frontend testing. It's known for its flexibility and straightforward syntax, allowing for asynchronous testing and the use of any assertion library.

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!

JavaScript Popular tools for testing: Mocha, Jasmine, Unit JS, Jest

To execute your tests, you can create test scripts using popular testing frameworks like Mocha, Jasmine, or Jest. These frameworks provide a structured way to organize and run your tests, report results, and handle assertions.

⚗️ Mocha and Chai for testing

Testing frameworks like Jest, Mocha, and Jasmine are crucial for software development, ensuring code reliability and correctness. They offer features like test suites, test cases, assertions, and asynchronous testing support.