Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/test-iter-01.cs

@@ -0,0 +1,44 @@
+// Compiler options: -langversion:default
+
+using System;
+using System.Collections;
+
+class X {
+	static IEnumerator GetIt ()
+	{
+		yield return 1;
+		yield return 2;
+		yield return 3;
+	}
+	
+	static IEnumerable GetIt2 ()
+	{
+		yield return 1;
+		yield return 2;
+		yield return 3;
+	}
+
+	public static int Main ()
+	{
+		IEnumerator e = GetIt ();
+		int total = 0;
+		
+		while (e.MoveNext ()){
+			Console.WriteLine ("Value=" + e.Current);
+			total += (int) e.Current;
+		}
+
+		if (total != 6)
+			return 1;
+
+		total = 0;
+		foreach (int i in GetIt2 ()){
+			Console.WriteLine ("Value=" + i);
+			total += i;
+		}
+		if (total != 6)
+			return 2;
+		
+		return 0;
+	}
+}