public static void InsightCollectionCopyTo() { var aapl = Symbol.Create("AAPL", SecurityType.Equity, "usa"); var insightCollection = new InsightCollection(); insightCollection.Add(new Insight(aapl, new TimeSpan(1, 0, 0, 0), InsightType.Price, InsightDirection.Up) { GeneratedTimeUtc = new DateTime(2019, 1, 1), CloseTimeUtc = new DateTime(2019, 1, 1), }); insightCollection.Add(new Insight(aapl, new TimeSpan(1, 0, 0, 0), InsightType.Volatility, InsightDirection.Up) { GeneratedTimeUtc = new DateTime(2019, 1, 2), CloseTimeUtc = new DateTime(2019, 1, 2), }); var insights = new Insight[7] { new Insight(aapl, new TimeSpan(1, 0, 0, 0), InsightType.Price, InsightDirection.Up) { GeneratedTimeUtc = new DateTime(2019, 1, 5), CloseTimeUtc = new DateTime(2019, 1, 5), }, new Insight(aapl, new TimeSpan(1, 0, 0, 0), InsightType.Price, InsightDirection.Flat) { GeneratedTimeUtc = new DateTime(2019, 1, 6), CloseTimeUtc = new DateTime(2019, 1, 6), }, new Insight(aapl, new TimeSpan(1, 0, 0, 0), InsightType.Price, InsightDirection.Down) { GeneratedTimeUtc = new DateTime(2019, 1, 7), CloseTimeUtc = new DateTime(2019, 1, 7), }, new Insight(aapl, new TimeSpan(1, 0, 0, 0), InsightType.Volatility, InsightDirection.Up) { GeneratedTimeUtc = new DateTime(2019, 1, 8), CloseTimeUtc = new DateTime(2019, 1, 8), }, new Insight(aapl, new TimeSpan(1, 0, 0, 0), InsightType.Volatility, InsightDirection.Down) { GeneratedTimeUtc = new DateTime(2019, 1, 9), CloseTimeUtc = new DateTime(2019, 1, 9), }, null, null }; insightCollection.CopyTo(insights, 5); var orderedInsights = insights.OrderBy(x => x.CloseTimeUtc).ToList(); var orderedInsightsDe = JsonConvert.DeserializeObject <InsightCollection>(_expectedResultCopyTo); var equals = orderedInsights.Zip(orderedInsightsDe, (i, de) => { return(i.CloseTimeUtc == de.CloseTimeUtc && i.GeneratedTimeUtc == de.GeneratedTimeUtc && i.Symbol.Value == de.Symbol.Value && i.Type == de.Type && i.ReferenceValue == de.ReferenceValue && i.Direction == de.Direction && i.Period == de.Period); }); Assert.IsTrue(equals.All((x) => x)); }