Implement patchedast for type alias

Author: lieryan

CHANGELOG.md

@@ -1,7 +1,8 @@
 # **Upcoming release**
 
 - #850 Update and pin black version in pre-commit and Github Actions
-- #850 Bump supported python version to up to Python 3.14
+- #851 Bump supported python version to up to Python 3.14
+- #852 Implement patchedast for TypeAlias
 
 # Release 1.14.0
 

rope/refactor/patchedast.py

@@ -825,6 +825,10 @@ def _MatchMapping(self, node):
         children.append("}")
         self._handle(node, children)
 
+    def _TypeAlias(self, node):
+        children = ["type", node.name, node.value]
+        self._handle(node, children)
+
 
 class _Source:
     def __init__(self, source):

ropetest/refactor/patchedasttest.py

@@ -1510,6 +1510,20 @@ def test_match_node_with_match_mapping_match_as(self):
             "}",
         ])
 
+    def test_type_alias(self):
+        source = dedent("""\
+            type Point = tuple[float, float]
+        """)
+        ast_frag = patchedast.get_patched_ast(source, True)
+        checker = _ResultChecker(self, ast_frag)
+        checker.check_children("TypeAlias", [
+            "type",
+            " ",
+            "Name",
+            " = ",
+            "Subscript",
+        ])
+
 
 class _ResultChecker:
     def __init__(self, test_case, ast):