Tests made compatible with Firebird 4

- one test was failed due to difference of oredering locally and on server side
- the rest just suppose to be ignored as they were for 2.5

Author: alex-kulakov

Orm/Xtensive.Orm.Tests/Linq/SelectManyTest.cs

@@ -392,6 +392,8 @@ from c2 in Session.Query.All<Customer>()
     public void IntersectBetweenFilterAndApplyTest()
     {
       Require.AllFeaturesSupported(ProviderFeatures.Apply);
+      Require.ProviderIsNot(StorageProvider.Firebird);
+
       var expected = Session.Query.All<Invoice>().Count(i => i.DesignatedEmployee.FirstName.StartsWith("A"));
       IQueryable<Invoice> result = Session.Query.All<Customer>()
         .SelectMany(c => Session.Query.All<Invoice>().Where(i => i.Customer==c).Intersect(Session.Query.All<Invoice>())
@@ -458,14 +460,14 @@ public void TwoCalculateWithApplyTest()
       Require.AllFeaturesSupported(ProviderFeatures.Apply);
 
       var actual = from c in Session.Query.All<Customer>()
-        from n in (c.Invoices.Select(i => c.FirstName + i.BillingAddress.StreetAddress))
-          .Union(c.Invoices.Select(i => c.FirstName + i.BillingAddress.StreetAddress))
+        from n in (c.Invoices.Select(i => c.FirstName + i.BillingAddress.StreetAddress).Where(x => x.StartsWith("M")))
+          .Union(c.Invoices.Select(i => c.FirstName + i.BillingAddress.StreetAddress).Where(x => x.StartsWith("N")))
         orderby n
         select n;
 
       var expected = from c in Customers
-        from n in (c.Invoices.Select(i => c.FirstName + i.BillingAddress.StreetAddress))
-          .Union(c.Invoices.Select(i => c.FirstName + i.BillingAddress.StreetAddress))
+        from n in (c.Invoices.Select(i => c.FirstName + i.BillingAddress.StreetAddress).Where(x => x.StartsWith("M")))
+          .Union(c.Invoices.Select(i => c.FirstName + i.BillingAddress.StreetAddress).Where(x => x.StartsWith("N")))
         orderby n
         select n;
 
@@ -477,6 +479,8 @@ orderby n
     public void TwoFilterWithApplyTest()
     {
       Require.AllFeaturesSupported(ProviderFeatures.Apply);
+      Require.ProviderIsNot(StorageProvider.Firebird);
+
       var actual = from c in Session.Query.All<Customer>()
         from i in (c.Invoices.Where(x => x.BillingAddress.StreetAddress.StartsWith("A"))
           .Intersect(c.Invoices.Where(x => x.BillingAddress.StreetAddress.StartsWith("A"))))

Orm/Xtensive.Orm.Tests/Linq/SetOperationsTest.cs

@@ -237,6 +237,8 @@ public void UnionStructureTest()
     public void IntersectWithoutOneOfSelect()
     {
       Require.AllFeaturesSupported(ProviderFeatures.Apply);
+      Require.ProviderIsNot(StorageProvider.Firebird);
+
       var actual = from c in Session.Query.All<Customer>()
       from r in (c.Invoices)
         .Intersect(c.Invoices).Select(o => o.PaymentDate)