Fix runtime review findings

clients/dotnet/MxGateway.Client.Tests/GalaxyRepositoryClientTests.cs

@@ -68,8 +68,10 @@ public sealed class GalaxyRepositoryClientTests
     public async Task DiscoverHierarchyAsync_ReturnsObjectsFromReply()
     {
         FakeGalaxyRepositoryTransport transport = CreateTransport();
-        transport.DiscoverHierarchyReply = new DiscoverHierarchyReply
+        transport.DiscoverHierarchyReplies.Enqueue(new DiscoverHierarchyReply
         {
+            NextPageToken = "page-2",
+            TotalObjectCount = 2,
             Objects =
             {
                 new GalaxyObject
@@ -91,12 +93,29 @@ public sealed class GalaxyRepositoryClientTests
                     },
                 },
             },
-        };
+        });
+        transport.DiscoverHierarchyReplies.Enqueue(new DiscoverHierarchyReply
+        {
+            TotalObjectCount = 2,
+            Objects =
+            {
+                new GalaxyObject
+                {
+                    GobjectId = 13,
+                    TagName = "DelmiaReceiver_002",
+                },
+            },
+        });
         await using GalaxyRepositoryClient client = CreateClient(transport);
 
         IReadOnlyList<GalaxyObject> objects = await client.DiscoverHierarchyAsync();
 
-        GalaxyObject obj = Assert.Single(objects);
+        Assert.Equal(2, objects.Count);
+        Assert.Equal(2, transport.DiscoverHierarchyCalls.Count);
+        Assert.Equal(5000, transport.DiscoverHierarchyCalls[0].Request.PageSize);
+        Assert.Equal("", transport.DiscoverHierarchyCalls[0].Request.PageToken);
+        Assert.Equal("page-2", transport.DiscoverHierarchyCalls[1].Request.PageToken);
+        GalaxyObject obj = objects[0];
         Assert.Equal(12, obj.GobjectId);
         Assert.Equal("DelmiaReceiver_001", obj.TagName);
         GalaxyAttribute attribute = Assert.Single(obj.Attributes);