test(acl): list published zaaktypen for the beheer catalogus viewer (refs #130)

services/acl/Acl.Tests/AclServiceTests.cs

@@ -65,6 +65,14 @@ public class AclServiceTests
             ResolvedByOmschrijving = omschrijving;
             return Task.FromResult(ResolvedInformatieobjecttype);
         }
+
+        public IReadOnlyList<ZaaktypeSummary> Zaaktypen { get; } =
+        [
+            new("BIG-REGISTRATIE", "BIG-registratie", new Uri("http://openzaak/catalogi/api/v1/zaaktypen/big")),
+        ];
+
+        public Task<IReadOnlyList<ZaaktypeSummary>> ListZaaktypenAsync(CancellationToken ct = default) =>
+            Task.FromResult(Zaaktypen);
     }
 
     private static AclDefaults Defaults() => new()
@@ -225,4 +233,18 @@ public class AclServiceTests
         await Assert.ThrowsAsync<ArgumentNullException>(() => service.GetZaakReferenceAsync(null!));
         Assert.Null(gateway.ReadReferenceFor);
     }
+
+    [Fact]
+    public async Task Listing_zaaktypen_returns_the_gateways_published_zaaktypen(/* S-15a */)
+    {
+        var gateway = new FakeGateway();
+        var service = ServiceWith(gateway, Defaults(), new DateOnly(2026, 6, 4));
+
+        var zaaktypen = await service.ListZaaktypenAsync();
+
+        var only = Assert.Single(zaaktypen);
+        Assert.Equal("BIG-REGISTRATIE", only.Identificatie);
+        Assert.Equal("BIG-registratie", only.Omschrijving);
+        Assert.Equal(new Uri("http://openzaak/catalogi/api/v1/zaaktypen/big"), only.Url);
+    }
 }

services/acl/Acl.Tests/ZaaktypeCatalogTests.cs

@@ -36,6 +36,7 @@ public class ZaaktypeCatalogTests
         public Task SetZaakToCancellationStatusAsync(Uri z, Uri zt, DateOnly d, CancellationToken ct = default) => throw new NotSupportedException();
         public Task<string> GetZaakIdentificatieAsync(Uri z, CancellationToken ct = default) => throw new NotSupportedException();
         public Task<Uri> StoreDocumentAsync(DocumentRequest r, CancellationToken ct = default) => throw new NotSupportedException();
+        public Task<IReadOnlyList<ZaaktypeSummary>> ListZaaktypenAsync(CancellationToken ct = default) => throw new NotSupportedException();
     }
 
     private static AclDefaults Defaults() => new()