Preserve idempotence for sanitized fetch-prefix separators

Co-authored-by: Shri Sukhani <shrisukhani@users.noreply.github.com>

Author: cursoragent

hyperbrowser/client/polling.py

@@ -129,9 +129,10 @@ def build_operation_name(prefix: object, identifier: object) -> str:
 
 def build_fetch_operation_name(operation_name: object) -> str:
     normalized_operation_name = build_operation_name("", operation_name)
-    if normalized_operation_name.lower().startswith(
+    normalized_lower_operation_name = normalized_operation_name.lower()
+    if normalized_lower_operation_name.startswith(
         _FETCH_OPERATION_NAME_PREFIX.lower()
-    ):
+    ) or normalized_lower_operation_name.startswith("fetching?"):
         return normalized_operation_name
     return build_operation_name(
         _FETCH_OPERATION_NAME_PREFIX,

tests/test_polling.py

@@ -57,6 +57,14 @@ def test_build_fetch_operation_name_is_idempotent_case_insensitive():
     assert build_fetch_operation_name(operation_name) == operation_name
 
 
+def test_build_fetch_operation_name_is_idempotent_for_sanitized_fetch_separator():
+    operation_name = "Fetching\tcrawl job 123"
+    normalized_operation_name = build_fetch_operation_name(operation_name)
+
+    assert normalized_operation_name == "Fetching?crawl job 123"
+    assert normalized_operation_name.count("Fetching") == 1
+
+
 def test_build_fetch_operation_name_truncates_to_preserve_fetch_prefix():
     operation_name = "x" * 200
     fetch_operation_name = build_fetch_operation_name(operation_name)