chore: import upstream snapshot with attribution

tests/test_transforms.py

@@ -0,0 +1,43 @@
+import logging
+
+import pytest
+
+from agents.util._transforms import transform_string_function_style
+
+
+@pytest.mark.parametrize(
+    ("name", "transformed"),
+    [
+        ("My Tool", "my_tool"),
+        ("My-Tool", "my_tool"),
+    ],
+)
+def test_transform_string_function_style_warns_for_replaced_characters(
+    caplog: pytest.LogCaptureFixture,
+    name: str,
+    transformed: str,
+) -> None:
+    with caplog.at_level(logging.WARNING, logger="openai.agents"):
+        assert transform_string_function_style(name) == transformed
+
+    assert f"Tool name {name!r} contains invalid characters" in caplog.text
+    assert f"transformed to {transformed!r}" in caplog.text
+
+
+@pytest.mark.parametrize(
+    ("name", "transformed"),
+    [
+        ("MyTool", "mytool"),
+        ("transfer_to_Agent", "transfer_to_agent"),
+        ("snake_case", "snake_case"),
+    ],
+)
+def test_transform_string_function_style_does_not_warn_for_case_only_changes(
+    caplog: pytest.LogCaptureFixture,
+    name: str,
+    transformed: str,
+) -> None:
+    with caplog.at_level(logging.WARNING, logger="openai.agents"):
+        assert transform_string_function_style(name) == transformed
+
+    assert caplog.records == []