index.js

import assert from "assert";
import * as fs from "fs";
import { svelte } from "../helpers.js";

function tryRequire(file) {
	try {
		return require(file).default;
	} catch (err) {
		if (err.code !== "MODULE_NOT_FOUND") throw err;
		return null;
	}
}

describe("css", () => {
	fs.readdirSync("test/css/samples").forEach(dir => {
		if (dir[0] === ".") return;

		// add .solo to a sample directory name to only run that test
		const solo = /\.solo/.test(dir);

		if (solo && process.env.CI) {
			throw new Error("Forgot to remove `solo: true` from test");
		}

		(solo ? it.only : it)(dir, () => {
			const config = tryRequire(`./samples/${dir}/_config.js`) || {};
			const input = fs
				.readFileSync(`test/css/samples/${dir}/input.html`, "utf-8")
				.replace(/\s+$/, "");

			const actual = svelte.compile(input, config).css;
			fs.writeFileSync(`test/css/samples/${dir}/_actual.css`, actual);
			const expected = fs.readFileSync(
				`test/css/samples/${dir}/expected.css`,
				"utf-8"
			);

			assert.equal(actual.trim(), expected.trim());
		});
	});
});