add a test

Author: kevinjqliu

tests/expressions/test_pyparsing_warning.py

@@ -0,0 +1,35 @@
+#  Licensed to the Apache Software Foundation (ASF) under one
+#  or more contributor license agreements.  See the NOTICE file
+#  distributed with this work for additional information
+#  regarding copyright ownership.  The ASF licenses this file
+#  to you under the Apache License, Version 2.0 (the
+#  "License"); you may not use this file except in compliance
+#  with the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing,
+#  software distributed under the License is distributed on an
+#  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+#  KIND, either express or implied.  See the License for the
+#  specific language governing permissions and limitations
+#  under the License.
+import importlib
+import sys
+
+import pyparsing as pp
+
+
+def test_table_import_without_pyparsing_diagnostic_warning() -> None:
+    diagnostic = pp.Diagnostics.warn_ungrouped_named_tokens_in_collection
+    was_enabled = pp.__diag__.warn_ungrouped_named_tokens_in_collection
+
+    pp.enable_diag(diagnostic)
+    sys.modules.pop("pyiceberg.table", None)
+    sys.modules.pop("pyiceberg.expressions.parser", None)
+
+    try:
+        importlib.import_module("pyiceberg.table")
+    finally:
+        if not was_enabled:
+            pp.disable_diag(diagnostic)