public void TestCircularReferences()
        {
            _expectedData = new TestCollection();
            for (var i = 0; i < 10; i++)
            {
                var item = new TestItem(i, _expectedData, RandomEnum());
                _expectedData.Add(item);
            }

            _expectedHash = _expectedData.GetHashCode();

            _client.PushMessage(_expectedData);
            _barrier.WaitOne(TimeSpan.FromSeconds(5));

            if (_exceptions.Any())
            {
                throw new AggregateException(_exceptions);
            }

            Assert.NotNull(_actualHash,
                           string.Format("Server should have received client's {0} item message", _expectedData.Count));
            Assert.AreEqual(_expectedHash, _actualHash,
                            string.Format("Hash codes for {0} item message should match", _expectedData.Count));
            Assert.AreEqual(_expectedData.Count, _actualData.Count,
                            string.Format("Collection lengths should be equal"));

            for (var i = 0; i < _actualData.Count; i++)
            {
                var expectedItem = _expectedData[i];
                var actualItem   = _actualData[i];
                Assert.AreEqual(expectedItem, actualItem, string.Format("Items at index {0} should be equal", i));
                Assert.AreEqual(actualItem.Parent, _actualData,
                                string.Format("Item at index {0}'s Parent property should reference the item's parent collection",
                                              i));
            }
        }
 protected bool Equals(TestItem other)
 {
     return(Id == other.Id && Enum == other.Enum);
 }