com.unity.services.samples.game-lobby/Assets/Scripts/GameLobby/Tests/PlayMode/AsyncTestHelper.cs

using System;
using System.Collections;
using System.Threading.Tasks;

namespace Test.Tools
{
	public class AsyncTestHelper
	{
		public static IEnumerator Await(Task task)
		{
			while (!task.IsCompleted)
			{
				yield return null;
			}

			if (task.IsFaulted)
			{
				throw task.Exception;
			}
		}

		public static IEnumerator Await(Func<Task> taskDelegate)
		{
			return Await(taskDelegate.Invoke());
		}
	}
}