Revert parts of pandas-dev#35711

Author: jbrockmendel

pandas/conftest.py

@@ -157,15 +157,6 @@ def add_imports(doctest_namespace):
     doctest_namespace["pd"] = pd
 
 
-@pytest.fixture(autouse=True)
-def check_file_leaks():
-    """
-    Check that a test does not leak file handles.
-    """
-    with td.file_leak_context():
-        yield
-
-
 # ----------------------------------------------------------------
 # Common arguments
 # ----------------------------------------------------------------

pandas/tests/io/parser/test_common.py

@@ -1836,6 +1836,7 @@ def test_raise_on_no_columns(all_parsers, nrows):
         parser.read_csv(StringIO(data))
 
 
+@td.check_file_leaks
 def test_memory_map(all_parsers, csv_dir_path):
     mmap_file = os.path.join(csv_dir_path, "test_mmap.csv")
     parser = all_parsers

pandas/tests/io/test_sql.py

@@ -263,8 +263,7 @@ def _get_all_tables(self):
         return table_list
 
     def _close_conn(self):
-        # https://docs.sqlalchemy.org/en/13/core/connections.html#engine-disposal
-        self.conn.dispose()
+        pass
 
 
 class PandasSQLTest:
@@ -1243,7 +1242,7 @@ class _TestSQLAlchemy(SQLAlchemyMixIn, PandasSQLTest):
     def setup_class(cls):
         cls.setup_import()
         cls.setup_driver()
-        conn = cls.conn = cls.connect()
+        conn = cls.connect()
         conn.connect()
 
     def load_test_data_and_sql(self):