added failing maxscan test.

Author: craiggwilson

src/MongoDB.Driver.Tests/MongoCollectionTests.cs

@@ -1251,6 +1251,17 @@ public void TestFindWithinRectangle()
             // note: the hits are unordered
         }
 
+        [Test]
+        public void TestFindWithMaxScan()
+        {
+            if (_collection.Exists()) { _collection.Drop(); }
+            var docs = Enumerable.Range(0, 10).Select(x => new BsonDocument("_id", x));
+            _collection.InsertBatch(docs);
+
+            var results = _collection.FindAll().SetMaxScan(4).ToList();
+            Assert.AreEqual(4, results.Count);
+        }
+
         [Test]
         public void TestFindWithMaxTime()
         {