Use a counter for data for shorter file paths

tests/utils.py

@@ -1,13 +1,24 @@
 import hashlib
 from pathlib import Path
 from tempfile import TemporaryDirectory
+from typing import Any
 import uuid
 from zipfile import ZipFile
 
 
-def data_factory() -> str:
-    """Utility function to generate a random data string."""
-    return str(uuid.uuid4())
+class _DataFactory:
+    """Utility function to generate a unique data string using an incrementing counter."""
+
+    def __init__(self) -> None:
+        self.counter = 0
+
+    def __call__(self) -> str:
+        out = f"{self.counter:04d}:"
+        self.counter += 1
+        return out
+
+
+data_factory = _DataFactory()
 
 
 def file_factory(parent_dir: Path) -> Path: