make is_bubble_uid return False for non-string inputs

Author: purificant

src/bubble_data_api_client/validation.py

@@ -2,12 +2,15 @@
 
 import re
 from collections.abc import Iterable
+from typing import Any
 
 _BUBBLE_UID_PATTERN: re.Pattern[str] = re.compile(r"^[0-9]+x[0-9]+$")
 
 
-def is_bubble_uid(value: str) -> bool:
+def is_bubble_uid(value: Any) -> bool:
     """Check if a string matches the Bubble UID format (e.g., '1767090310181x452059685440531200')."""
+    if not isinstance(value, str):
+        return False
     return _BUBBLE_UID_PATTERN.fullmatch(value) is not None
 
 

src/tests/unit/test_validation.py

@@ -19,6 +19,22 @@ def test_is_bubble_uid_valid(value: str) -> None:
     assert is_bubble_uid(value) is True
 
 
+@pytest.mark.parametrize(
+    ("value", "reason"),
+    [
+        (None, "None"),
+        (123, "integer"),
+        (123.456, "float"),
+        (["1x2"], "list"),
+        ({"uid": "1x2"}, "dict"),
+        (True, "boolean"),
+    ],
+)
+def test_is_bubble_uid_non_string(value: object, reason: str) -> None:
+    """Non-string values should return False without raising."""
+    assert is_bubble_uid(value) is False, f"should reject: {reason}"
+
+
 @pytest.mark.parametrize(
     ("value", "reason"),
     [