Svelte-jest

Unit testing Svelte projet in Jest

Install

Install Svelte.

npx degit sveltejs/template my-svelte-project
cd my-svelte-project

Install Jest.

npm install --save-dev jest
or 
yarn add --dev jest

Configuration

After installation configure babel to support ES2015 modules

Step 1 :

Add your test environment to .babelrc in the root of your project:

/// <reference types="babel" />
{
    "env":{
        "test":{
            "plugins":["transform-es2015-modules-commonjs"]
        }
    }
}

Step 2 :

npm install --save-dev babel-plugin-transform-es2015-modules-commonjs

And that's it. Jest will enable compilation from ES modules to CommonJS automatically, without having to inform additional options to your jest property inside package.json