Fix type hints and expect re.error

Author: jg-rp

jsonpath/function_extensions/_pattern.py

@@ -46,15 +46,15 @@ def __init__(
         debug: bool = False,
         thread_safe: bool = False,
     ):
-        self.cache: LRUCache[str, Optional[re.Pattern[str]]] = (
+        self.cache: LRUCache[str, Optional[re.Pattern]] = (  # type: ignore
             ThreadSafeLRUCache(capacity=cache_capacity)
             if thread_safe
             else LRUCache(capacity=cache_capacity)
         )
 
         self.debug = debug
 
-    def check_cache(self, pattern: str) -> Optional[re.Pattern[str]]:
+    def check_cache(self, pattern: str) -> Optional[re.Pattern]:  # type: ignore
         """Return a compiled re pattern if `pattern` is valid, or `None` otherwise."""
         try:
             _pattern = self.cache[pattern]

tests/test_regex_cache.py

@@ -1,3 +1,12 @@
+try:
+    import regex as re
+
+    REGEX_AVAILABLE = True
+except ImportError:
+    import re  # type: ignore
+
+    REGEX_AVAILABLE = False
+
 try:
     import iregexp_check  # noqa: F401
 
@@ -39,7 +48,7 @@ def test_debug_regex_patterns() -> None:
     search_func = Search(cache_capacity=2, debug=True)
     assert len(search_func.cache) == 0
 
-    with pytest.raises(JSONPathError):
+    with pytest.raises((JSONPathError, re.error)):
         search_func("abcdef", "bc[")