re-add range tests that were removed for some reason

svn path=/trunk/mcs/; revision=102325

mcs/class/System.Core/Test/System.Linq/EnumerableTest.cs

@@ -247,6 +247,14 @@ namespace MonoTests.System.Linq {
 			Assert.AreEqual (23.25, (new long [] { 24, 7, 28, 34 }).Average ());
 		}
 
+		[Test]
+		public void TestRange ()
+		{
+			AssertAreSame (new [] {1, 2, 3, 4}, Enumerable.Range (1, 4));
+
+			AssertAreSame (new [] {0, 1, 2, 3}, Enumerable.Range (0, 4));
+		}
+
 		[Test]
 		public void TestOrderBy ()
 		{