Test hscan/zscan/sscan against larger sets and with different page sizes

StackExchange.Redis.Tests/Scans.cs

@@ -85,5 +85,68 @@ public void HashScan(bool supported)
                 Assert.IsTrue(arr.Any(x => x.Key == "c" && x.Value == "3"), "c");
             }
         }
+
+        [Test]
+        [TestCase(10)]
+        [TestCase(100)]
+        [TestCase(1000)]
+        [TestCase(10000)]
+        public void HashScanLarge(int pageSize)
+        {
+            using (var conn = Create())
+            {
+                RedisKey key = Me();
+                var db = conn.GetDatabase();
+                db.KeyDelete(key);
+
+                for(int i = 0; i < 2000;i++)
+                    db.HashSet(key, "k" + i, "v" + i, flags:  CommandFlags.FireAndForget);
+
+                int count = db.HashScan(key, pageSize: pageSize).Count();
+                Assert.AreEqual(2000, count);
+            }
+        }
+
+        [Test]
+        [TestCase(10)]
+        [TestCase(100)]
+        [TestCase(1000)]
+        [TestCase(10000)]
+        public void SetScanLarge(int pageSize)
+        {
+            using (var conn = Create())
+            {
+                RedisKey key = Me();
+                var db = conn.GetDatabase();
+                db.KeyDelete(key);
+
+                for (int i = 0; i < 2000; i++)
+                    db.SetAdd(key, "s" + i, flags: CommandFlags.FireAndForget);
+
+                int count = db.SetScan(key, pageSize: pageSize).Count();
+                Assert.AreEqual(2000, count);
+            }
+        }
+
+        [Test]
+        [TestCase(10)]
+        [TestCase(100)]
+        [TestCase(1000)]
+        [TestCase(10000)]
+        public void SortedSetScanLarge(int pageSize)
+        {
+            using (var conn = Create())
+            {
+                RedisKey key = Me();
+                var db = conn.GetDatabase();
+                db.KeyDelete(key);
+
+                for (int i = 0; i < 2000; i++)
+                    db.SortedSetAdd(key, "z" + i, i, flags: CommandFlags.FireAndForget);
+
+                int count = db.SortedSetScan(key, pageSize: pageSize).Count();
+                Assert.AreEqual(2000, count);
+            }
+        }
     }
 }