microbundle/test/index.test.js

import { resolve } from 'path';
import fs from 'fs-extra';
import { promisify } from 'es6-promisify';
import dirTree from 'directory-tree';
import shellQuote from 'shell-quote';
import _rimraf from 'rimraf';
import { strip } from './lib/util';
import { readFile } from '../src/utils';
import createProg from '../src/prog';
import microbundle from '../src/index';

const rimraf = promisify(_rimraf);

const FIXTURES_DIR = `${__dirname}/fixtures`;
const DEFAULT_SCRIPT = 'microbundle';

const times = (n, fn) => Array.from({ length: n }).map(i => fn(i));
const join = (arr, delimiter = '') => arr.join(delimiter);
const constant = konst => () => konst;

const printTree = (nodes, indentLevel = 0) => {
	const indent = join(times(indentLevel, constant('  ')));
	return join(nodes.filter(node => node.name[0] !== '.').map(node =>
		`${indent}${node.name}\n${node.type === 'directory' ? printTree(node.children, indentLevel + 1) : ''}`
	));
};

const parseScript = (() => {
	let parsed;
	const prog = createProg(_parsed => parsed = _parsed);
	return script => {
		const argv = shellQuote.parse(`node ${script}`);
		// assuming {op: 'glob', pattern} for non-string args
		prog(argv.map(arg => typeof arg === 'string' ? arg : arg.pattern));
		return parsed;
	};
})();

describe('fixtures', () => {
	fs.readdirSync(FIXTURES_DIR).forEach(fixtureDir => {
		const fixturePath = resolve(FIXTURES_DIR, fixtureDir);

		if (!fs.statSync(fixturePath).isDirectory()) {
			return;
		}

		it(fixtureDir, async () => {
			await rimraf(resolve(`${fixturePath}/dist`));

			let script;
			try {
				({ scripts: { build: script } = {} } = JSON.parse(await readFile(resolve(fixturePath, 'package.json'), 'utf8')));
			}
			catch (err) {}
			script = script || DEFAULT_SCRIPT;

			const prevDir = process.cwd();
			process.chdir(resolve(fixturePath));

			const parsedOpts = parseScript(script);

			const output = await microbundle({
				...parsedOpts,
				cwd: parsedOpts.cwd !== '.' ? parsedOpts.cwd : resolve(fixturePath)
			});

			process.chdir(prevDir);

			const printedDir = printTree([dirTree(fixturePath)]);

			expect([
				`Used script: ${script}`,
				'Directory tree:',
				printedDir,
				strip(output)
			].join('\n\n')).toMatchSnapshot();
		});
	});
});