// Run with "tsc && node --harmony test.js"
// Node.js version: 9.7.1

declare const console: any;

async function *asyncGenerator(): AsyncIterable<number> {
  yield 1;
  yield Promise.resolve(2);
}

(async function() {
	const iterator: AsyncIterator<number> = asyncGenerator()[Symbol.asyncIterator]();

	// Should be {value: 1, done: false}
	console.log(await iterator.next());

	// Should be {value: 2, done: false}
	//
	// But actually is { value: Promise { 2 }, done: false } with the
	// following targets: es5, es6, es20{15, 16, 17, 18}.
	// The target "esnext" prevents any downcompilation and therefore
	// works natively on Node.js/V8 as intended.
	console.log(await iterator.next());

	// Should be {value: undefined, done: true}
	console.log(await iterator.next());
})();