xanderbailey commented on code in PR #2453:
URL: https://github.com/apache/iceberg-rust/pull/2453#discussion_r3395118528


##########
crates/iceberg/src/table.rs:
##########
@@ -441,4 +495,134 @@ mod tests {
         assert!(!table.readonly());
         assert_eq!(table.identifier.name(), "table");
     }
+
+    fn make_kms() -> Arc<dyn KeyManagementClient> {
+        let kms = MemoryKeyManagementClient::new();
+        kms.add_master_key("master-1").unwrap();
+        Arc::new(kms)
+    }
+
+    async fn encrypted_table_metadata() -> (TableMetadata, FileIO, Arc<dyn 
KeyManagementClient>) {
+        let io = FileIO::new_with_memory();
+        let plain_path = "memory:///table/metadata/manifest-list-plain.avro";
+        let encrypted_path = "memory:///table/metadata/manifest-list-enc.avro";
+
+        let output = 
io.new_output(plain_path).unwrap().writer().await.unwrap();
+        let mut writer = ManifestListWriter::v3(output, 1, None, 0, Some(0));
+        writer.add_manifests(std::iter::empty()).unwrap();
+        writer.close().await.unwrap();
+        let raw = io.new_input(plain_path).unwrap().read().await.unwrap();
+
+        let kms: Arc<dyn KeyManagementClient> = {
+            let k = MemoryKeyManagementClient::new();
+            k.add_master_key("master-1").unwrap();
+            Arc::new(k)
+        };
+        let mgr = EncryptionManager::builder()
+            .kms_client(Arc::clone(&kms))
+            .table_key_id("master-1")
+            .build();
+        let encrypted_output = 
mgr.encrypt(io.new_output(encrypted_path).unwrap());
+        let std_km: StandardKeyMetadata = 
encrypted_output.key_metadata().clone();
+        encrypted_output.write(raw).await.unwrap();
+        let key_id = mgr
+            .encrypt_manifest_list_key_metadata(&std_km)
+            .await
+            .unwrap();
+
+        let mut metadata: TableMetadata = 
load_test_metadata("TableMetadataV3ValidEncryption.json");
+        metadata.encryption_keys = mgr.with_encryption_keys(|keys| 
keys.clone());

Review Comment:
   Ah I see, okay this is because I didn't know if we wanted to commit an 
encrypted manifest list but I've now added a full test fixture. The metadata 
json contains the keys and that corresponds to a real encrypted manifest list. 
[47999e4](https://github.com/apache/iceberg-rust/pull/2453/commits/47999e43593e59257e0fbff43d365405b0f9923a)
   
   I hope this is closer to what you were looking for! 



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