Add test for issue #171

Author: alex-kulakov

Orm/Xtensive.Orm.Tests/Issues/IssueGithub0171_ReadDateTimeOffsetFromPackedTuple.cs

@@ -0,0 +1,103 @@
+// Copyright (C) 2021 Xtensive LLC.
+// This code is distributed under MIT license terms.
+// See the License.txt file in the project root for more information.
+
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using NUnit.Framework;
+using Xtensive.Orm.Configuration;
+using Xtensive.Orm.Tests.Issues.IssueGithub0171_ReadDateTimeOffsetFromPackedTupleModel;
+
+namespace Xtensive.Orm.Tests.Issues.IssueGithub0171_ReadDateTimeOffsetFromPackedTupleModel
+{
+  [HierarchyRoot]
+  public class Cargo : Entity
+  {
+    [Field, Key]
+    public int Id { get; private set; }
+
+    [Field]
+    public DateTimeOffset DateTimeOffsetField { get; set; }
+
+    [Field]
+    public DateTime DateTimeField { get; set; }
+
+    [Field, Association(PairTo = nameof(CargoLoad.Cargo))]
+    public EntitySet<CargoLoad> Loads { get; private set; }
+
+    public Cargo(Session session)
+      : base(session)
+    {
+    }
+  }
+
+  [HierarchyRoot]
+  public class CargoLoad: Entity
+  {
+    [Field, Key]
+    public int Id { get; private set; }
+
+    [Field]
+    public Cargo Cargo { get; private set; }
+
+    public CargoLoad(Session session, Cargo cargo)
+      : base(session)
+    {
+      Cargo = cargo;
+    }
+  }
+}
+
+namespace Xtensive.Orm.Tests.Issues
+{
+  public class IssueGithub0171_ReadDateTimeOffsetFromPackedTuple : AutoBuildTest
+  {
+    protected override DomainConfiguration BuildConfiguration()
+    {
+      var config = base.BuildConfiguration();
+      config.Types.Register(typeof(Cargo));
+      config.Types.Register(typeof(CargoLoad));
+      config.UpgradeMode = DomainUpgradeMode.Recreate;
+      return config;
+    }
+
+    [Test]
+    public void DateTimeOffsetCase()
+    {
+      // NRE on within PackedFieldAccessor.GetValue<T>
+      using (var session = Domain.OpenSession())
+      using (var tx = session.OpenTransaction()) {
+        var cargo3 = new Cargo(session);
+        var cargoLoad = new CargoLoad(session, null);
+
+        var query = session.Query.All<CargoLoad>()
+          .LeftJoin(session.Query.All<Cargo>(),
+            cl => cl.Cargo,
+            c => c,
+            (cl, c) => new { CargoLoad = cl, Cargo = c })
+          .Select(t => t.Cargo.DateTimeOffsetField)
+          .ToArray();
+      }
+    }
+
+    [Test]
+    public void DateTimeCase()
+    {
+      //Works fine.
+      using (var session = Domain.OpenSession())
+      using (var tx = session.OpenTransaction()) {
+        var cargo3 = new Cargo(session);
+        var cargoLoad = new CargoLoad(session, null);
+
+        var query = session.Query.All<CargoLoad>()
+          .LeftJoin(session.Query.All<Cargo>(),
+            cl => cl.Cargo,
+            c => c,
+            (cl, c) => new { CargoLoad = cl, Cargo = c })
+          .Select(t => t.Cargo.DateTimeField)
+          .ToArray();
+      }
+    }
+  }
+}