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new file mode 100644
index 0000000..7f08300
--- /dev/null
+++ b/Lib/test/test_pep649_aug.py
@@ -0,0 +1,372 @@
+import annotationlib
+import functools
+import importlib
+import sys
+import typing
+import unittest
+
+
+class PEP649AugTest(unittest.TestCase):
+ def test_forwardref_requires_owner_or_type_params(self):
+ ref = annotationlib.ForwardRef("T")
+ with self.assertRaises(TypeError):
+ ref.evaluate(globals={"T": int}, locals={})
+
+ def test_forwardref_evaluates_type_params_namespace(self):
+ T = typing.TypeVar("T")
+ ref = annotationlib.ForwardRef("T")
+
+ self.assertIs(ref.evaluate(globals={}, locals={}, type_params=(T,)), T)
+
+ def test_forwardref_evaluates_starred_typevartuple(self):
+ Ts = typing.TypeVarTuple("Ts")
+ ref = annotationlib.ForwardRef("*Ts")
+
+ self.assertEqual(
+ ref.evaluate(globals={}, locals={}, type_params=(Ts,)),
+ typing.Unpack[Ts],
+ )
+
+ def test_call_annotate_value_notimplemented_is_runtime_error(self):
+ def annotate(format):
+ raise NotImplementedError
+
+ with self.assertRaises(RuntimeError):
+ annotationlib.call_annotate_function(annotate, annotationlib.Format.VALUE)
+
+ def test_get_annotations_returns_fresh_dict(self):
+ def f(x: int) -> str:
+ pass
+
+ first = annotationlib.get_annotations(f)
+ first["x"] = str
+
+ self.assertEqual(f.__annotations__, {"x": int, "return": str})
+ self.assertEqual(annotationlib.get_annotations(f), {"x": int, "return": str})
+ self.assertIsNot(annotationlib.get_annotations(f), f.__annotations__)
+
+ def test_typing_evaluate_forward_ref_source_does_not_evaluate(self):
+ ref = annotationlib.ForwardRef("MissingType")
+
+ self.assertEqual(
+ typing.evaluate_forward_ref(
+ ref,
+ globals={},
+ locals={},
+ type_params=(),
+ format=annotationlib.Format.SOURCE,
+ ),
+ "MissingType",
+ )
+
+ def test_get_type_hints_class_source_does_not_evaluate(self):
+ class C:
+ x: MissingType
+
+ self.assertEqual(
+ typing.get_type_hints(C, format=annotationlib.Format.SOURCE),
+ {"x": "MissingType"},
+ )
+
+ def test_get_type_hints_class_source_preserves_forwardref_objects(self):
+ ref = annotationlib.ForwardRef("Legacy")
+
+ class C:
+ pass
+
+ C.__annotations__ = {"x": ref}
+
+ self.assertIs(
+ typing.get_type_hints(C, format=annotationlib.Format.SOURCE)["x"],
+ ref,
+ )
+
+ def test_get_type_hints_function_source_does_not_evaluate(self):
+ def f(x: MissingType) -> OtherType:
+ pass
+
+ self.assertEqual(
+ typing.get_type_hints(f, format=annotationlib.Format.SOURCE),
+ {"x": "MissingType", "return": "OtherType"},
+ )
+
+ def test_get_type_hints_function_source_preserves_forwardref_objects(self):
+ ref = annotationlib.ForwardRef("Legacy")
+
+ def f():
+ pass
+
+ f.__annotations__ = {"return": ref}
+
+ self.assertIs(
+ typing.get_type_hints(f, format=annotationlib.Format.SOURCE)["return"],
+ ref,
+ )
+
+ def test_namedtuple_source_format_returns_source_strings(self):
+ Point = typing.NamedTuple("Point", [("x", int), ("y", str)])
+
+ self.assertEqual(
+ Point.__annotate__(annotationlib.Format.SOURCE),
+ {"x": "int", "y": "str"},
+ )
+
+ def test_stringifier_source_covers_public_expression_forms(self):
+ def annotate(format):
+ if format != 1:
+ raise NotImplementedError
+ return {
+ "item": Missing["key"],
+ "tuple_item": Missing[1, 2],
+ "attr": Missing.attr,
+ "call": Missing(1, flag=True),
+ "star": tuple(Missing),
+ "add": Missing + 3,
+ "sub": Missing - 3,
+ "mul": Missing * 3,
+ "matmul": Missing @ 3,
+ "truediv": Missing / 3,
+ "mod": Missing % 3,
+ "lshift": Missing << 3,
+ "rshift": Missing >> 3,
+ "or": Missing | 3,
+ "xor": Missing ^ 3,
+ "and": Missing & 3,
+ "floordiv": Missing // 3,
+ "pow": Missing**3,
+ "radd": 3 + Missing,
+ "rsub": 3 - Missing,
+ "rmul": 3 * Missing,
+ "rmatmul": 3 @ Missing,
+ "rtruediv": 3 / Missing,
+ "rmod": 3 % Missing,
+ "rlshift": 3 << Missing,
+ "rrshift": 3 >> Missing,
+ "ror": 3 | Missing,
+ "rxor": 3 ^ Missing,
+ "rand": 3 & Missing,
+ "rfloordiv": 3 // Missing,
+ "rpow": 3**Missing,
+ "lt": Missing < 3,
+ "le": Missing <= 3,
+ "eq": Missing == 3,
+ "ne": Missing != 3,
+ "gt": Missing > 3,
+ "ge": Missing >= 3,
+ "invert": ~Missing,
+ "pos": +Missing,
+ "neg": -Missing,
+ }
+
+ source = annotationlib.call_annotate_function(
+ annotate, annotationlib.Format.SOURCE
+ )
+
+ self.assertEqual(source["item"], "Missing['key']")
+ self.assertEqual(source["tuple_item"], "Missing[1, 2]")
+ self.assertEqual(source["attr"], "Missing.attr")
+ self.assertEqual(source["call"], "Missing(1, flag=True)")
+ self.assertEqual(source["star"], "tuple(Missing)")
+ self.assertEqual(source["add"], "Missing + 3")
+ self.assertEqual(source["radd"], "3 + Missing")
+ self.assertEqual(source["lt"], "Missing < 3")
+ self.assertEqual(source["neg"], "-Missing")
+
+ def test_stringifier_rejects_format_specifiers(self):
+ def annotate(format):
+ if format != 1:
+ raise NotImplementedError
+ return {"bad": f"{Missing:>10}"}
+
+ with self.assertRaises(TypeError):
+ annotationlib.call_annotate_function(
+ annotate, annotationlib.Format.SOURCE
+ )
+
+ def test_forwardref_public_edge_behaviors(self):
+ with self.assertRaisesRegex(TypeError, "Forward reference must be a string"):
+ annotationlib.ForwardRef(42)
+
+ with self.assertRaises(TypeError):
+ class BadForwardRef(annotationlib.ForwardRef):
+ pass
+
+ cached = annotationlib.ForwardRef("Alias")
+ self.assertIs(
+ cached.evaluate(globals={"Alias": int}, locals={}, type_params=()),
+ int,
+ )
+ self.assertIs(cached.evaluate(), int)
+
+ class Owner:
+ Alias = str
+
+ owned = annotationlib.ForwardRef("Alias", owner=Owner, is_class=True)
+ self.assertIs(owned.evaluate(type_params=()), str)
+
+ module_owned = annotationlib.ForwardRef("int", owner=sys.modules["builtins"])
+ self.assertIs(module_owned.evaluate(type_params=()), int)
+
+ module_ref = annotationlib.ForwardRef("str", module="builtins")
+ self.assertIs(module_ref.evaluate(type_params=(), globals={}), str)
+ self.assertIn("module='builtins'", repr(module_ref))
+
+ left = annotationlib.ForwardRef("Alias")
+ right = annotationlib.ForwardRef("Alias")
+ self.assertIs(left.evaluate(globals={"Alias": dict}, locals={}, type_params=()), dict)
+ self.assertIs(right.evaluate(globals={"Alias": dict}, locals={}, type_params=()), dict)
+ self.assertEqual(left, right)
+ self.assertEqual(hash(left), hash(right))
+
+ union_ref = annotationlib.ForwardRef("Later")
+ self.assertEqual(union_ref | int, typing.Union[union_ref, int])
+ self.assertEqual(int | union_ref, typing.Union[int, union_ref])
+
+ with self.assertRaisesRegex(SyntaxError, "Forward reference must be an expression"):
+ annotationlib.ForwardRef("if").evaluate(globals={}, locals={}, type_params=())
+
+ def test_get_annotations_public_error_and_legacy_object_paths(self):
+ class BadAnnotate:
+ @staticmethod
+ def __annotate__(format):
+ return []
+
+ with self.assertRaises(ValueError):
+ annotationlib.get_annotations(
+ BadAnnotate, format=annotationlib.Format.SOURCE
+ )
+
+ class BadAnnotations:
+ pass
+
+ BadAnnotations.__annotations__ = 42
+ with self.assertRaisesRegex(ValueError, "neither a dict nor None"):
+ annotationlib.get_annotations(BadAnnotations)
+
+ class LegacyObject:
+ __annotations__ = {"x": "int"}
+
+ self.assertEqual(
+ annotationlib.get_annotations(LegacyObject(), eval_str=True),
+ {"x": int},
+ )
+
+ def test_typing_value_paths_and_annotation_stripping(self):
+ ref = annotationlib.ForwardRef("int")
+ self.assertIs(
+ typing.evaluate_forward_ref(
+ ref, globals={"int": int}, locals={}, type_params=()
+ ),
+ int,
+ )
+
+ with self.assertRaises(NameError):
+ typing.evaluate_forward_ref(
+ annotationlib.ForwardRef("MissingType"),
+ globals={},
+ locals={},
+ type_params=(),
+ )
+
+ class C:
+ x: typing.Annotated[int, "meta"]
+
+ def f(x: typing.Annotated[str, "meta"]) -> typing.Annotated[int, "meta"]:
+ pass
+
+ self.assertEqual(typing.get_type_hints(C), {"x": int})
+ self.assertEqual(typing.get_type_hints(f), {"x": str, "return": int})
+
+ def test_import_reexports_annotation_helpers(self):
+ import dataclasses
+ import inspect
+
+ inspect = importlib.reload(inspect)
+ dataclasses = importlib.reload(dataclasses)
+
+ self.assertIs(inspect.get_annotations, annotationlib.get_annotations)
+ self.assertTrue(hasattr(dataclasses, "_init_fn"))
+
+ def test_zz_module_reloads_and_public_fallback_paths(self):
+ anno = importlib.reload(annotationlib)
+ typing_mod = typing
+
+ self.assertEqual(
+ anno.__all__,
+ ["Format", "ForwardRef", "call_annotate_function", "get_annotations"],
+ )
+ self.assertTrue(hasattr(typing_mod, "ForwardRef"))
+ self.assertEqual([member.value for member in anno.Format], [1, 2, 3])
+
+ with self.assertRaises(TypeError):
+ class BadForwardRef(anno.ForwardRef):
+ pass
+
+ with self.assertRaises(TypeError):
+ anno.ForwardRef(42)
+
+ module_ref = anno.ForwardRef("int", module="builtins")
+ self.assertIs(module_ref.evaluate(type_params=()), int)
+ self.assertIs(module_ref.evaluate(type_params=()), int)
+ self.assertIn("module='builtins'", repr(module_ref))
+ self.assertEqual(anno.ForwardRef("int"), anno.ForwardRef("int"))
+ self.assertIsInstance(hash(anno.ForwardRef("int")), int)
+ self.assertIn(str, (anno.ForwardRef("int") | str).__args__)
+ self.assertIn(str, (str | anno.ForwardRef("int")).__args__)
+
+ def make_annotate_with_empty_cell():
+ missing_cell_value = object()
+
+ def annotate(format):
+ if format != 1:
+ raise NotImplementedError
+ return {"x": missing_cell_value}
+
+ del missing_cell_value
+ return annotate
+
+ fwd = anno.call_annotate_function(
+ make_annotate_with_empty_cell(), anno.Format.FORWARDREF
+ )
+ self.assertIsInstance(fwd["x"], anno.ForwardRef)
+
+ def annotated(x):
+ pass
+
+ annotated.__annotations__ = {"x": "int"}
+ partial = functools.partial(annotated)
+ partial.__annotations__ = {"x": "int"}
+ self.assertEqual(anno.get_annotations(partial, eval_str=True), {"x": int})
+
+ self.assertIs(
+ typing_mod.evaluate_forward_ref(
+ anno.ForwardRef("int"),
+ globals={"int": int},
+ locals={},
+ type_params=(),
+ ),
+ int,
+ )
+
+ class C:
+ __annotations__ = {"x": "int"}
+
+ self.assertEqual(typing_mod.get_type_hints(C), {"x": int})
+ with self.assertRaises(TypeError):
+ typing_mod.get_type_hints(42)
+
+ def f(x):
+ pass
+
+ f.__annotations__ = {"x": "int", "return": None}
+ self.assertEqual(
+ typing_mod.get_type_hints(f),
+ {"x": int, "return": type(None)},
+ )
+
+ Empty = typing_mod.NamedTuple("Empty", [])
+ self.assertEqual(Empty.__annotate__(anno.Format.VALUE), {})
+
+ Movie = typing_mod.TypedDict("Movie", {"title": str})
+ self.assertEqual(Movie.__annotate__(anno.Format.SOURCE), {"title": "str"})
+ self.assertEqual(Movie.__annotate__(anno.Format.VALUE), {"title": str})
diff --git a/Lib/test/test_pep649_p2p_aug.py b/Lib/test/test_pep649_p2p_aug.py
new file mode 100644
index 0000000000..0000000000
--- /dev/null
+++ b/Lib/test/test_pep649_p2p_aug.py
@@ -0,0 +1,15 @@
+from fractions import Fraction
+import math
+import statistics
+import unittest
+
+
+class PEP649P2PAugTest(unittest.TestCase):
+ def test_math_fsum_preserves_small_residual(self):
+ self.assertEqual(math.fsum([1e100, 1.0, -1e100]), 1.0)
+
+ def test_statistics_mean_preserves_fraction_type(self):
+ self.assertEqual(
+ statistics.mean([Fraction(1, 3), Fraction(2, 3)]),
+ Fraction(1, 2),
+ )
|