Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-linq-07.cs

@@ -0,0 +1,76 @@
+
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+class SelectMany
+{
+	public static int Main ()
+	{
+		int[] a1 = new int [] { 0, 1 };
+		string[] a2 = new string [] { "10", "11" };
+
+		int id = 0;
+
+		// Explicitly typed
+		var e = from int i1 in a1
+			from string i2 in a2
+			select new { i1, i2 };
+		
+		foreach (var item in e) {
+			Console.WriteLine (item);
+			
+			if (item.i1 != id / 2)
+				return 1;
+			
+			if (id % 2 == 0)
+				if (item.i2 != "10")
+					return 2;
+				
+			++id;
+		}
+		
+		var e2 = from int i1 in a1
+			where i1 > 0
+			from string i2 in a2
+			from int i3 in a1
+			orderby i3
+			select new { pp = 9, i1, i3 };
+		
+		id = 0;
+		foreach (var item in e2) {
+			Console.WriteLine (item);
+			
+			if (item.i1 != 1)
+				return 3;
+			
+			if (id / 2 != item.i3)
+				return 4;
+			++id;
+		}
+		
+		// Implicitly typed
+		var e3 = from i1 in a1
+			from i2 in a2
+			select new { i1, i2 };
+		
+		id = 0;
+		foreach (var item in e3) {
+			Console.WriteLine (item);
+			
+			if (item.i1 != id / 2)
+				return 1;
+			
+			if (id % 2 == 0)
+				if (item.i2 != "10")
+					return 2;
+				
+			++id;
+		}
+
+		Console.WriteLine ("OK");
+		return 0;
+	}
+}
+