nystudio107 / rollup-plugin-critical

import {Plugin} from 'rollup';

import critical from '../index';

import fs from 'fs';

import path from 'path';

const TESTS_ROOT = './src/__tests__/';

test('Basic Critical CSS generation', done => {

    function callback(err: string) {

        try {

            expect(fs.readFileSync(path.join(TESTS_ROOT, 'test_critical.min.css')))

                .toEqual(fs.readFileSync(path.join(TESTS_ROOT, 'index_critical.min.css')));

            done();

        } catch (error) {

            done(error);

        }

    }

    // Instantiate the Rollup plugin

    const plugin: Plugin = critical({

        criticalBase: TESTS_ROOT,

        criticalUrl: TESTS_ROOT,

        pages: [

            {

                uri: 'index.html',

                template: 'test',

            }

        ],

        criticalConfig: {

        }

    }, callback);

    // Call the plugin to generate critical css

    if (plugin && plugin.writeBundle) {

        // @ts-ignore

        const result = plugin.writeBundle({

            dir: TESTS_ROOT,

        }, {

            chunk: {

                type: 'asset',

                fileName: 'style.css',

            }

        });

    }

});