websocket.js
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websocket.js
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	import { test, summary } from './helpers.js';
	import { spawn } from 'child_process';

	console.log('WebSocket Tests\n');

	const port = 32187;
	const serverPath = new URL('./fixtures/websocket_server.mjs', import.meta.url).pathname;

	function sleep(ms) {
	return new Promise(resolve => setTimeout(resolve, ms));
	}

	function startServer(path) {
	const child = spawn(process.execPath, [path, String(port)]);
	child.on('stderr', data => {
	if (String(data).trim()) console.log(String(data).trim());
	});
	return child;
	}

	test('WebSocket global exists', typeof WebSocket, 'function');
	test('WebSocket CONNECTING constant', WebSocket.CONNECTING, 0);
	test('WebSocket OPEN constant', WebSocket.OPEN, 1);
	test('MessageEvent global exists', typeof MessageEvent, 'function');
	test('CloseEvent global exists', typeof CloseEvent, 'function');

	const server = startServer(serverPath);
	await sleep(150);

	const result = await new Promise(resolve => {
	const seen = [];
	const socket = new WebSocket(`ws://127.0.0.1:${port}/ws`);
	socket.binaryType = 'arraybuffer';

	socket.onopen = () => {
	seen.push('open');
	socket.send('hello');
	};

	socket.addEventListener('message', event => {
	seen.push(event.data);
	if (event.data === 'string:hello') socket.send('close');
	});

	socket.onclose = event => {
	resolve({
	seen,
	code: event.code,
	reason: event.reason,
	readyState: socket.readyState
	});
	};

	socket.onerror = () => {
	resolve({ seen, code: -1, reason: 'error', readyState: socket.readyState });
	};
	});

	server.kill('SIGTERM');

	test('WebSocket opened', result.seen.includes('open'), true);
	test('WebSocket text send preserves opcode', result.seen.includes('string:hello'), true);
	test('WebSocket close code', result.code, 1000);
	test('WebSocket closed state', result.readyState, WebSocket.CLOSED);

	summary();

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