test.js

import process from 'node:process';
import fs from 'node:fs';
import path from 'node:path';
import test from 'ava';
import webpack from 'webpack';
import {temporaryDirectory} from 'tempy';
import pify from 'pify';

delete process.env.NODE_ENV;

test('main', async t => {
	const {default: config} = await import('./fixture/webpack.config.js');
	const cwd = temporaryDirectory();
	config.output.path = cwd;
	await pify(webpack)(config);
	t.regex(fs.readFileSync(path.join(cwd, 'unicorn.js'), 'utf8'), /development/);
});