Catch out of range slice selector arguments.

Author: jg-rp

CHANGELOG.md

@@ -21,6 +21,7 @@
 - Raise a `JSONPathSyntaxError` for empty selector segments.
 - Raise a `JSONPathIndexError` if an index selector is out of range.
 - Raise a `JSONPathSyntaxError` for too many colons in a slice selector.
+- Raise a `JSONPathIndexError` if a slice selector argument is out of range.
 
 ## Version 0.4.0
 

jsonpath/selectors.py

@@ -204,8 +204,8 @@ def __init__(
         stop: Optional[int] = None,
         step: Optional[int] = None,
     ) -> None:
-        # TODO: raise if start, stop or step are out of range
         super().__init__(env=env, token=token)
+        self._check_range(start, stop, step)
         self.slice = slice(start, stop, step)
 
     def __str__(self) -> str:
@@ -214,6 +214,13 @@ def __str__(self) -> str:
         step = self.slice.step if self.slice.step is not None else "1"
         return f"[{start}:{stop}:{step}]"
 
+    def _check_range(self, *indices: Optional[int]) -> None:
+        for i in indices:
+            if i is not None and (
+                i < self.env.min_int_index or i > self.env.max_int_index
+            ):
+                raise JSONPathIndexError("index out of range")
+
     def _normalized_index(self, obj: Sequence[object], index: int) -> int:
         if index < 0 and len(obj) >= abs(index):
             return len(obj) + index