Fix tag test case for providers with no batches support

Author: alex-kulakov

Orm/Xtensive.Orm.Tests/Linq/TagTest.cs

@@ -884,6 +884,7 @@ void SqlCapturer(object sender, DbCommandEventArgs args)
     public void SessionTagPrefetchEntitySet()
     {
       var allCommands = new List<string>();
+      var batchesSupported = Domain.Handlers.ProviderInfo.Supports(Providers.ProviderFeatures.Batches);
 
       using (var session = Domain.OpenSession())
       using (var tx = session.OpenTransaction()) {
@@ -907,8 +908,15 @@ public void SessionTagPrefetchEntitySet()
         _ = session.Query.All<Author>().Prefetch(a => a.Books).ToArray();
         session.Events.DbCommandExecuting -= SqlCapturer;
 
-        Assert.That(allCommands.Count, Is.EqualTo(2));
-        Assert.IsTrue(allCommands[1].StartsWith("/*outermost*/"));
+        if (batchesSupported) {
+          Assert.That(allCommands.Count, Is.EqualTo(2));
+          Assert.IsTrue(allCommands[1].StartsWith("/*outermost*/"));
+        }
+        else {
+          Assert.That(allCommands.Count, Is.EqualTo(3));
+          Assert.IsTrue(allCommands[1].StartsWith("/*outermost*/"));
+          Assert.IsTrue(allCommands[2].StartsWith("/*outermost*/"));
+        }
 
         allCommands.Clear();
       }
@@ -922,8 +930,15 @@ public void SessionTagPrefetchEntitySet()
           _ = session.Query.All<Author>().Prefetch(a => a.Books).ToArray();
           session.Events.DbCommandExecuting -= SqlCapturer;
 
-          Assert.That(allCommands.Count, Is.EqualTo(2));
-          Assert.IsTrue(allCommands[1].StartsWith("/*outermost in-between*/"));
+          if (batchesSupported) {
+            Assert.That(allCommands.Count, Is.EqualTo(2));
+            Assert.IsTrue(allCommands[1].StartsWith("/*outermost in-between*/"));
+          }
+          else {
+            Assert.That(allCommands.Count, Is.EqualTo(3));
+            Assert.IsTrue(allCommands[1].StartsWith("/*outermost in-between*/"));
+            Assert.IsTrue(allCommands[2].StartsWith("/*outermost in-between*/"));
+          }
 
           allCommands.Clear();
         }
@@ -939,8 +954,15 @@ public void SessionTagPrefetchEntitySet()
             _ = session.Query.All<Author>().Prefetch(a => a.Books).ToArray();
             session.Events.DbCommandExecuting -= SqlCapturer;
 
-            Assert.That(allCommands.Count, Is.EqualTo(2));
-            Assert.IsTrue(allCommands[1].StartsWith("/*outermost in-between deepest*/"));
+            if (batchesSupported) {
+              Assert.That(allCommands.Count, Is.EqualTo(2));
+              Assert.IsTrue(allCommands[1].StartsWith("/*outermost in-between deepest*/"));
+            }
+            else {
+              Assert.That(allCommands.Count, Is.EqualTo(3));
+              Assert.IsTrue(allCommands[1].StartsWith("/*outermost in-between deepest*/"));
+              Assert.IsTrue(allCommands[2].StartsWith("/*outermost in-between deepest*/"));
+            }
 
             allCommands.Clear();
           }