refactor(test_transform): optimize base64 encoding

Author: Ahmedhossamdev

tests/test_transform.py

@@ -398,10 +398,7 @@ async def test_base64_file_input(use_async: bool) -> None:
 
     # pathlib.Path is automatically converted to base64
     result = await transform({"foo": SAMPLE_FILE_PATH}, TypedDictBase64Input, use_async)
-    assert result["foo"] in [
-        "SGVsbG8sIHdvcmxkIVxuCg",
-        "SGVsbG8sIHdvcmxkIVxuDQo="
-    ]
+    assert result["foo"] in ["SGVsbG8sIHdvcmxkIVxuCg", "SGVsbG8sIHdvcmxkIVxuDQo="]  # type: ignore[comparison-overlap]
 
     # io instances are automatically converted to base64
     assert await transform({"foo": io.StringIO("Hello, world!")}, TypedDictBase64Input, use_async) == {