Python: Fix warnings from pytest

python/pyproject.toml

@@ -113,11 +113,16 @@ gcsfs = ["gcsfs"]
 
 [tool.pytest.ini_options]
 markers = [
+  "unmarked: unmarked tests",
   "s3: marks a test as requiring access to s3 compliant storage (use with --aws-access-key-id, --aws-secret-access-key, and --endpoint args)",
   "adlfs: marks a test as requiring access to adlfs compliant storage (use with --adlfs.account-name, --adlfs.account-key, and --adlfs.endpoint args)",
   "integration: marks integration tests against Apache Spark",
   "gcs: marks a test as requiring access to gcs compliant storage (use with --gs.token, --gs.project, and --gs.endpoint)"
 ]
+# Turns a warning into an error
+filterwarnings = [
+    "error"
+]
 
 [tool.black]
 line-length = 130

python/tests/catalog/test_sql.py

@@ -16,6 +16,7 @@
 # under the License.
 
 import os
+import warnings
 from pathlib import Path
 from typing import Generator, List
 
@@ -275,6 +276,7 @@ def test_create_namespace_with_comment_and_location(test_catalog: SqlCatalog, da
     assert properties["location"] == test_location
 
 
+@pytest.mark.filterwarnings("ignore")
 def test_create_namespace_with_null_properties(test_catalog: SqlCatalog, database_name: str) -> None:
     with pytest.raises(IntegrityError):
         test_catalog.create_namespace(namespace=database_name, properties={None: "value"})  # type: ignore

python/tests/conftest.py

@@ -1461,6 +1461,7 @@ def adlfs_fsspec_fileio(request: pytest.FixtureRequest) -> Generator[FsspecFileI
     bbs.create_container("tests")
     yield fsspec.FsspecFileIO(properties=properties)
     bbs.delete_container("tests")
+    bbs.close()
 
 
 @pytest.fixture(scope="session")

python/tests/io/test_io.py

@@ -288,12 +288,14 @@ def test_load_file_io_location_no_schema() -> None:
     assert isinstance(load_file_io({"location": "/no-schema/"}), PyArrowFileIO)
 
 
+@pytest.mark.filterwarnings("ignore")
 def test_mock_warehouse_location_file_io() -> None:
     # For testing the selection logic
     io = load_file_io({"warehouse": "test://some-path/"})
     assert io.properties["warehouse"] == "test://some-path/"
 
 
+@pytest.mark.filterwarnings("ignore")
 def test_mock_table_location_file_io() -> None:
     # For testing the selection logic
     io = load_file_io({}, "test://some-path/")

python/tests/test_transforms.py

@@ -432,6 +432,7 @@ def test_void_transform() -> None:
 
 class TestType(IcebergBaseModel):
     __root__: Transform[Any, Any]
+    __test__ = False
 
 
 def test_bucket_transform_serialize() -> None: