test_fs_readfile_url.mjs
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test_fs_readfile_url.mjs
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	import * as fs from 'node:fs';
	import * as fsp from 'node:fs/promises';
	import path from 'node:path';

	function assert(condition, message) {
	if (!condition) throw new Error(message);
	}

	async function readFileCallback(url, encoding) {
	return await new Promise((resolve, reject) => {
	fs.readFile(url, encoding, (error, data) => {
	if (error) reject(error);
	else resolve(data);
	});
	});
	}

	async function main() {
	const dirPath = path.join(import.meta.dirname, '.fs url tmp');
	const filePath = path.join(dirPath, 'url file.txt');
	const content = 'hello from file URL reads';

	fs.rmSync(dirPath, { recursive: true, force: true });
	fs.mkdirSync(dirPath, { recursive: true });
	fs.writeFileSync(filePath, content);
	const fileUrl = new URL(`file://${encodeURI(filePath)}`);

	try {
	const syncContent = fs.readFileSync(fileUrl, 'utf8');
	assert(syncContent === content, `expected sync read to match, got ${JSON.stringify(syncContent)}`);

	const callbackContent = await readFileCallback(fileUrl, 'utf8');
	assert(callbackContent === content, `expected callback read to match, got ${JSON.stringify(callbackContent)}`);

	const promiseContent = await fsp.readFile(fileUrl, 'utf8');
	assert(promiseContent === content, `expected promise read to match, got ${JSON.stringify(promiseContent)}`);

	console.log('fs readFile accepts file URLs');
	} finally {
	fs.rmSync(dirPath, { recursive: true, force: true });
	}
	}

	await main();