add iterdir test

Author: fangchenli

.github/workflows/unit-tests.yml

@@ -205,7 +205,7 @@ jobs:
       cancel-in-progress: true
     env:
       PANDAS_CI: 1
-      PYTEST_TARGET: pandas
+      PYTEST_TARGET: pandas/tests/io/test_common.py
       PATTERN: "not slow and not db and not network and not single_cpu"
       PYTEST_WORKERS: 'auto'
 

pandas/tests/io/conftest.py

@@ -225,6 +225,17 @@ def compression_ext(request):
     return request.param[0]
 
 
+@pytest.fixture
+def local_csv_file(tmp_path):
+    """
+    Fixture to create a dummy CSV file for testing.
+    """
+    file_path = tmp_path / "dummy.csv"
+    with open(file_path, "w") as f:
+        f.write("A,B,C\n1,2,3\n4,5,6\n")
+    return file_path
+
+
 @pytest.fixture
 def local_csv_directory(tmp_path):
     """

pandas/tests/io/test_common.py

@@ -707,7 +707,13 @@ def test_iterdir_local(local_csv_directory):
         assert file.suffix == ".csv"
 
 
-def test_iterdir_local_passthrough(local_csv_directory): ...
+def test_iterdir_local_passthrough(local_csv_file):
+    result = icom.iterdir(local_csv_file)
+    assert isinstance(result, list)
+    assert len(result) == 1
+    file = result[0]
+    assert file.exists()
+    assert file.is_file()
 
 
 def test_remote_csv_directory(remote_csv_directory):