test for parquet uuid

Author: Nick Manganelli

tests/test_3440_calculate_parquet_uuid.py

@@ -0,0 +1,56 @@
+# BSD 3-Clause License; see https://github.com/scikit-hep/awkward/blob/main/LICENSE
+
+from __future__ import annotations
+
+import pathlib
+
+import pytest
+
+import awkward
+
+metadata_from_parquet_submodule = pytest.importorskip(
+    "awkward.operations.ak_metadata_from_parquet"
+)
+metadata_from_parquet = metadata_from_parquet_submodule.metadata_from_parquet
+
+SAMPLES_DIR = pathlib.Path(__file__).parent / "samples"
+input = SAMPLES_DIR / "nullable-record-primitives.parquet"
+
+
+def test_parquet_uuid():
+    meta = metadata_from_parquet(input)
+    assert (
+        meta["uuid"]
+        == "93fd596534251b1ac750f359d9d55418b02bcddcc79cd5ab1e3d9735941fbcae"
+    )
+
+
+@pytest.mark.parametrize("calculate_uuid", [True, False])
+def test_return_tuple_with_or_without_uuid(calculate_uuid):
+    results = awkward.operations.ak_from_parquet.metadata(
+        input,
+        {},
+        None,
+        None,
+        False,
+        True,
+        calculate_uuid=calculate_uuid,
+    )
+    if calculate_uuid:
+        assert len(results) == 8, "Expected 8 items in the result tuple"
+        (
+            parquet_columns,
+            subform,
+            actual_paths,
+            fs,
+            subrg,
+            col_counts,
+            metadata,
+            uuid,
+        ) = results
+        assert uuid is not None, "UUID should be present when calculate_uuid is True"
+    else:
+        assert len(results) == 7, "Expected 7 items in the result tuple"
+        parquet_columns, subform, actual_paths, fs, subrg, col_counts, metadata = (
+            results
+        )