Fix broken test

Author: alex-kulakov

Orm/Xtensive.Orm.Tests/Linq/OfTypeTest.cs

@@ -795,20 +795,20 @@ public void Test14()
         var source2A = session.Query.All<AConcreteTable>().ToArray().OfType<IBaseEntity>();
         var source2B = session.Query.All<AConcreteTable>().OfType<IBaseEntity>();
 
-        var result1A = source1A.Union(source2A).Select(x => x.Field1).ToArray();
-        var result1B = source2B.Union(source1B).Select(x => x.Field1).ToArray();
+        var result1A = source1A.Union(source2A).Select(x => x.Field1).ToList();
+        var result1B = source2B.Union(source1B).Select(x => x.Field1).ToList();
 
         Assert.That(result1A, Is.Not.Empty);
-        Assert.That(result1A.Length, Is.EqualTo(result1B.Length));
-        Assert.That(result1A.Intersect(result1B).Count(), Is.EqualTo(result1A.Length));
+        Assert.That(result1B.Count, Is.EqualTo(result1A.Count));
+        Assert.That(result1A.Except(result1B), Is.Empty);
 
         var result2A = source1B.Union(source2B).ToArray().OfType<B3ClassTable>().Select(x => x.Field4)
-          .ToArray();
-        var result2B = source1B.Union(source2B).OfType<B3ClassTable>().Select(x => x.Field4).ToArray();
+          .ToList();
+        var result2B = source1B.Union(source2B).OfType<B3ClassTable>().Select(x => x.Field4).ToList();
 
         Assert.That(result2A, Is.Not.Empty);
-        Assert.That(result2A.Length, Is.EqualTo(result2B.Length));
-        Assert.That(result2A.Intersect(result2B).Count(), Is.EqualTo(result2A.Length));
+        Assert.That(result2B.Count, Is.EqualTo(result2A.Count));
+        Assert.That(result2A.Except(result2B), Is.Empty);
 
         var result3 = session.Query.All<AClassTable>().OfType<AConcreteTable>().ToArray();
         Assert.That(result3, Is.Empty);
@@ -829,17 +829,16 @@ public void Test14()
         var result1B = source2B.Union(source1B).Select(x => x.Field1).ToArray();
 
         Assert.That(result1A, Is.Not.Empty);
-        Assert.That(result1A.Length, Is.EqualTo(result1B.Length));
-        Assert.That(result1A.Intersect(result1B).Count(), Is.EqualTo(result1A.Length));
-
+        Assert.That(result1B.Length, Is.EqualTo(result1A.Length));
+        Assert.That(result1A.Except(result1B), Is.Empty);
 
         var result2A = source1B.Union(source2B).ToArray().OfType<B3ConcreteTable>().Select(x => x.Field4)
           .ToArray();
         var result2B = source1B.Union(source2B).OfType<B3ConcreteTable>().Select(x => x.Field4).ToArray();
 
         Assert.That(result2A, Is.Not.Empty);
-        Assert.That(result2A.Length, Is.EqualTo(result2B.Length));
-        Assert.That(result2A.Intersect(result2B).Count(), Is.EqualTo(result2A.Length));
+        Assert.That(result2B.Length, Is.EqualTo(result2A.Length));
+        Assert.That(result2A.Except(result2B), Is.Empty);
 
         var result3 = session.Query.All<AConcreteTable>().OfType<ASingleTable>().ToArray();
         Assert.That(result3, Is.Empty);
@@ -860,16 +859,16 @@ public void Test14()
         var result1B = source2B.Union(source1B).Select(x => x.Field1).ToArray();
 
         Assert.That(result1A, Is.Not.Empty);
-        Assert.That(result1A.Length, Is.EqualTo(result1B.Length));
-        Assert.That(result1A.Intersect(result1B).Count(), Is.EqualTo(result1A.Length));
+        Assert.That(result1B.Length, Is.EqualTo(result1A.Length));
+        Assert.That(result1A.Except(result1B), Is.Empty);
 
         var result2A = source1B.Union(source2B).ToArray().OfType<B3SingleTable>().Select(x => x.Field4)
           .ToArray();
         var result2B = source1B.Union(source2B).OfType<B3SingleTable>().Select(x => x.Field4).ToArray();
 
         Assert.That(result2A, Is.Not.Empty);
-        Assert.That(result2A.Length, Is.EqualTo(result2B.Length));
-        Assert.That(result2A.Intersect(result2B).Count(), Is.EqualTo(result2A.Length));
+        Assert.That(result2B.Length, Is.EqualTo(result2A.Length));
+        Assert.That(result2A.Except(result2B), Is.Empty);
 
         var result3 = session.Query.All<ASingleTable>().OfType<AClassTable>().ToArray();
         Assert.That(result3, Is.Empty);