Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

mcs/tests/test-async-77.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Threading.Tasks;
+
+public class Class1
+{
+	protected void InvokeAction (Action action)
+	{
+		action ();
+	}
+
+	public void Bar()
+	{
+	}
+
+	async Task Test ()
+	{
+		Task.Run(async () =>
+			{
+				var implementor = ServiceLocator.GetImplementor<IInterface1> ();
+				string message = null;
+				bool result = await implementor.Foo ((s) => message = s);
+
+				InvokeAction (() => Bar ());
+			}).Wait ();
+	}
+
+	interface IInterface1
+	{
+		Task<bool> Foo(Action<string> action);
+	}
+
+	class CIInterface1 : IInterface1
+	{
+		public Task<bool> Foo (Action<string> action)
+		{
+			action ("msg");
+			return Task.FromResult (false);
+		}
+	}
+
+	static class ServiceLocator
+	{
+		public static TService GetImplementor<TService>() where TService : class
+		{
+			return (TService) (object) new CIInterface1 ();
+		}
+	}
+
+	public static void Main ()
+	{
+		new Class1 ().Test ().Wait ();
+	}
+}
+