Function done

test/__d8.mjs:32–36

()

		await new Promise(resolve => {
			let calls = 0;
			const done = () => {
				if (calls++) throw Error(`Callback called multiple times\n\t${name}`);
				log('INFO', `✅  ${name}`);
				resolve();
			};
			Promise.resolve(done)
				.then(fn)
				.then(() => calls || done())