Test verifying that you can load a single tenanted document from a tenanted session or nested session

Author: jeremydmiller

src/DocumentDbTests/MultiTenancy/mixed_single_and_conjoined_tenancy.cs

@@ -0,0 +1,34 @@
+using System.Linq;
+using System.Threading.Tasks;
+using Marten.Testing.Documents;
+using Marten.Testing.Harness;
+using Shouldly;
+using Xunit;
+
+namespace DocumentDbTests.MultiTenancy;
+
+public class mixed_single_and_conjoined_tenancy : OneOffConfigurationsContext
+{
+    public mixed_single_and_conjoined_tenancy()
+    {
+        StoreOptions(opts =>
+        {
+            opts.Schema.For<Target>().SingleTenanted();
+            opts.Schema.For<User>().MultiTenanted();
+        });
+    }
+
+    [Fact]
+    public async Task load_single_tenanted_document_from_tenanted_session()
+    {
+        var targets = Target.GenerateRandomData(100).ToArray();
+        await theStore.BulkInsertDocumentsAsync(targets);
+
+        using var session1 = theStore.LightweightSession("blue");
+        (await session1.LoadAsync<Target>(targets[0].Id)).ShouldNotBeNull();
+
+        // Now do nested
+        var session2 = theSession.ForTenant("green");
+        (await session2.LoadAsync<Target>(targets[1].Id)).ShouldNotBeNull();
+    }
+}