feat(tasks): add skill-templated task graph execution

app-instance/backend/tests/unit/test_user_file_service.py

@@ -11,6 +11,7 @@ from beaver.services.user_files import (
     UserFileNotFoundError,
     UserFilePathError,
     UserFileSizeError,
+    UserFileStorageError,
     UserFileService,
     normalize_user_path,
 )
@@ -151,3 +152,68 @@ def test_minio_storage_rejects_paths_that_escape_namespace() -> None:
 
     with pytest.raises(UserFilePathError):
         storage._user_path("users/bob/uploads/secret.txt")
+
+
+@pytest.mark.asyncio
+async def test_minio_storage_translates_s3_errors_to_user_file_errors() -> None:
+    from minio.error import S3Error
+
+    class FakeMinioClient:
+        def list_objects(self, *args, **kwargs):
+            raise S3Error(
+                None,
+                "SignatureDoesNotMatch",
+                "The request signature we calculated does not match",
+                "/beaver-user-files",
+                "request-id",
+                "host-id",
+                bucket_name="beaver-user-files",
+            )
+
+    storage = object.__new__(MinIOUserFileStorage)
+    storage.config = MinIOStorageConfig(
+        endpoint="minio.local:9000",
+        access_key="alice-access",
+        secret_key="alice-secret",
+        bucket="beaver-user-files",
+        namespace="users/alice",
+    )
+    storage.client = FakeMinioClient()
+
+    with pytest.raises(UserFileStorageError) as exc_info:
+        await storage.list_dir("uploads")
+
+    assert "SignatureDoesNotMatch" in str(exc_info.value)
+
+
+@pytest.mark.asyncio
+async def test_minio_storage_does_not_report_auth_errors_as_missing_files() -> None:
+    from minio.error import S3Error
+
+    class FakeMinioClient:
+        def stat_object(self, *args, **kwargs):
+            raise S3Error(
+                None,
+                "SignatureDoesNotMatch",
+                "The request signature we calculated does not match",
+                "/beaver-user-files/uploads/input.txt",
+                "request-id",
+                "host-id",
+                bucket_name="beaver-user-files",
+                object_name="users/alice/uploads/input.txt",
+            )
+
+    storage = object.__new__(MinIOUserFileStorage)
+    storage.config = MinIOStorageConfig(
+        endpoint="minio.local:9000",
+        access_key="alice-access",
+        secret_key="alice-secret",
+        bucket="beaver-user-files",
+        namespace="users/alice",
+    )
+    storage.client = FakeMinioClient()
+
+    with pytest.raises(UserFileStorageError) as exc_info:
+        await storage.read_file("uploads/input.txt")
+
+    assert "SignatureDoesNotMatch" in str(exc_info.value)