Prepare for CTS schema changes and fix normalized slice indexes

Author: jg-rp

.gitignore

@@ -83,6 +83,7 @@ ENV/
 
 # Dev utils
 dev.py
+_dev.py
 profile_.py
 tests/test_dev.py
 

jsonpath_rfc9535/node.py

@@ -67,6 +67,10 @@ def values(self) -> List[object]:
         """Return the values from this node list."""
         return [node.value for node in self]
 
+    def paths(self) -> List[str]:
+        """Return normalized paths from this node list."""
+        return [node.path() for node in self]
+
     def items(self) -> List[Tuple[str, object]]:
         """Return a list of (path, value) pairs, one for each node in the list."""
         return [(node.path(), node.value) for node in self]

jsonpath_rfc9535/selectors.py

@@ -166,19 +166,13 @@ def _check_range(self, *indices: Optional[int]) -> None:
             ):
                 raise JSONPathIndexError("index out of range", token=self.token)
 
-    def _normalized_index(self, obj: Sequence[object], index: int) -> int:
-        if index < 0 and len(obj) >= abs(index):
-            return len(obj) + index
-        return index
-
     def resolve(self, node: JSONPathNode) -> Iterable[JSONPathNode]:
         """Select a range of values from an array/list."""
         if isinstance(node.value, list) and self.slice.step != 0:
-            idx = self.slice.start or 0
-            step = self.slice.step or 1
-            for element in node.value[self.slice]:
-                yield node.new_child(element, self._normalized_index(node.value, idx))
-                idx += step
+            for idx, element in zip(  # noqa: B905
+                range(*self.slice.indices(len(node.value))), node.value[self.slice]
+            ):
+                yield node.new_child(element, idx)
 
 
 class WildcardSelector(JSONPathSelector):

jsonpath_rfc9535/serialize.py

@@ -5,5 +5,9 @@
 
 def canonical_string(value: str) -> str:
     """Return _value_ as a canonically formatted string literal."""
-    single_quoted = json.dumps(value)[1:-1].replace('\\"', '"').replace("'", "\\'")
+    single_quoted = (
+        json.dumps(value, ensure_ascii=False)[1:-1]
+        .replace('\\"', '"')
+        .replace("'", "\\'")
+    )
     return f"'{single_quoted}'"

tests/test_compliance.py

@@ -25,7 +25,9 @@ class Case:
     selector: str
     document: JSONValue = None
     result: Any = None
+    result_paths: Optional[List[Any]] = None
     results: Optional[List[Any]] = None
+    results_paths: Optional[List[Any]] = None
     invalid_selector: Optional[bool] = None
     tags: List[str] = field(default_factory=list)
 
@@ -53,12 +55,15 @@ def test_compliance(case: Case) -> None:
         pytest.skip(reason=SKIP[case.name])  # no cov
 
     assert case.document is not None
-    rv = jsonpath.JSONPathNodeList(jsonpath.find(case.selector, case.document)).values()
+    nodes = jsonpath.JSONPathNodeList(jsonpath.find(case.selector, case.document))
 
     if case.results is not None:
-        assert rv in case.results
+        assert isinstance(case.results_paths, list)
+        assert nodes.values() in case.results
+        assert nodes.paths() in case.results_paths
     else:
-        assert rv == case.result
+        assert nodes.values() == case.result
+        assert nodes.paths() == case.result_paths
 
 
 @pytest.mark.parametrize("case", invalid_cases(), ids=operator.attrgetter("name"))