decision-webui-dcm/config/jest.environment.js

const JsdomEnvironment = require('jest-environment-jsdom');
const path = require('path');
const fs = require('fs');

class FineUiEnvironment extends JsdomEnvironment {
    async setup(...args) {
        await super.setup(args);

        const document = this.dom.window.document;

        document.createElement('body');

        [
            '../node_modules/fineui/dist/fineui.js',
            '../node_modules/fineui-materials/docs/materials.js',
            '../config/fineui.prepare.js',
            './fineui.setup.js',
        ].forEach(scriptRelativePath => {
            writeScript(document, scriptRelativePath);
        });

        return Promise.resolve();
    }
}

function writeScript(document, scriptRelativePath) {
    const scriptEl = document.createElement('script');
    scriptEl.text = fs.readFileSync(path.resolve(__dirname, scriptRelativePath), {
        encoding: 'utf8',
    });
    document.body.appendChild(scriptEl);
}

module.exports = FineUiEnvironment;