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new file mode 100644
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+++ b/Lib/test/test_pep646_aug.py
@@ -0,0 +1,73 @@
+import io
+import unittest
+
+from test import test_pep646_syntax
+
+
+class VariadicGenericsAugmentedTest(unittest.TestCase):
+
+ def test_pep646_syntax_doctest_examples(self):
+ test_pep646_syntax.test_main(verbose=False)
+
+ def test_starred_vararg_annotation_runtime_value(self):
+ ns = {}
+ exec(
+ "from typing import TypeVarTuple\n"
+ "Ts = TypeVarTuple('Ts')\n"
+ "def f(*args: *Ts):\n"
+ " pass\n",
+ ns,
+ )
+
+ annotation = ns["f"].__annotations__["args"]
+ self.assertNotIsInstance(annotation, tuple)
+ self.assertEqual(repr(annotation), "*Ts")
+
+ def test_future_starred_vararg_annotation_string(self):
+ ns = {}
+ exec(
+ "from __future__ import annotations\n"
+ "from typing import TypeVarTuple\n"
+ "Ts = TypeVarTuple('Ts')\n"
+ "def f(*args: *Ts):\n"
+ " pass\n",
+ ns,
+ )
+
+ self.assertEqual(ns["f"].__annotations__["args"], "*Ts")
+
+ def test_plain_vararg_annotation_still_uses_value(self):
+ ns = {}
+ exec(
+ "def f(*args: int):\n"
+ " pass\n",
+ ns,
+ )
+
+ self.assertIs(ns["f"].__annotations__["args"], int)
+
+ def test_existing_grammar_suite_still_passes(self):
+ stream = io.StringIO()
+ suite = unittest.defaultTestLoader.loadTestsFromName("test.test_grammar")
+ result = unittest.TextTestRunner(
+ stream=stream,
+ verbosity=0,
+ buffer=False,
+ ).run(suite)
+
+ self.assertTrue(result.wasSuccessful(), stream.getvalue())
+
+ def test_existing_compile_suite_still_passes(self):
+ stream = io.StringIO()
+ suite = unittest.defaultTestLoader.loadTestsFromName("test.test_compile")
+ result = unittest.TextTestRunner(
+ stream=stream,
+ verbosity=0,
+ buffer=False,
+ ).run(suite)
+
+ self.assertTrue(result.wasSuccessful(), stream.getvalue())
+
+
+if __name__ == "__main__":
+ unittest.main()
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