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new file mode 100644
index 0000000000..91d42b4c08
--- /dev/null
+++ b/Lib/test/test_tomllib_aug.py
@@ -0,0 +1,79 @@
+import datetime
+import decimal
+import io
+import unittest
+
+import tomllib
+
+
+class TomllibPublicApiAugTest(unittest.TestCase):
+ def test_load_accepts_binary_file_objects_only(self):
+ self.assertEqual(tomllib.load(io.BytesIO(b"answer = 42\n")), {"answer": 42})
+
+ with self.assertRaises(TypeError):
+ tomllib.load(io.StringIO("answer = 42\n"))
+
+ def test_loads_accepts_str_and_rejects_bytes(self):
+ self.assertEqual(tomllib.loads('name = "Ada"\n'), {"name": "Ada"})
+
+ with self.assertRaises(TypeError):
+ tomllib.loads(b'name = "Ada"\n')
+
+ def test_parse_float_callback_is_observed_and_kept_scalar(self):
+ seen = []
+
+ def parse_float(text):
+ seen.append(text)
+ return decimal.Decimal(text)
+
+ parsed = tomllib.loads("low = 1.25\nhigh = 2e3\n", parse_float=parse_float)
+ self.assertEqual(parsed, {"low": decimal.Decimal("1.25"), "high": decimal.Decimal("2e3")})
+ self.assertEqual(seen, ["1.25", "2e3"])
+
+ for bad_value in ({}, []):
+ with self.subTest(bad_value=type(bad_value).__name__):
+ with self.assertRaises(ValueError):
+ tomllib.loads("x = 1.0\n", parse_float=lambda _text, value=bad_value: value)
+
+ def test_duplicate_keys_and_frozen_namespaces_are_rejected(self):
+ invalid_documents = [
+ "a = 1\na = 2\n",
+ "tbl = { x = 1, x = 2 }\n",
+ "tbl = { x = 1 }\ntbl.y = 2\n",
+ "a.b = 1\n[a]\nc = 2\n",
+ ]
+ for document in invalid_documents:
+ with self.subTest(document=document):
+ with self.assertRaises(tomllib.TOMLDecodeError):
+ tomllib.loads(document)
+
+ def test_strings_comments_and_booleans_follow_toml_rules(self):
+ invalid_documents = [
+ 's = "first\nsecond"\n',
+ 's = "\\uD800"\n',
+ "x = 1 # bad" + chr(8) + "comment\n",
+ ]
+ for document in invalid_documents:
+ with self.subTest(document=repr(document)):
+ with self.assertRaises(tomllib.TOMLDecodeError):
+ tomllib.loads(document)
+
+ self.assertIs(tomllib.loads("enabled = false\n")["enabled"], False)
+
+ def test_arrays_datetimes_dates_and_non_decimal_integers(self):
+ parsed = tomllib.loads(
+ "values = [1, 2,]\n"
+ "ts = 2022-01-01T00:00:00+02:30\n"
+ "d = 2022-03-08\n"
+ "mask = 0xff\n"
+ )
+
+ self.assertEqual(parsed["values"], [1, 2])
+ self.assertEqual(parsed["ts"].utcoffset(), datetime.timedelta(hours=2, minutes=30))
+ self.assertIsInstance(parsed["d"], datetime.date)
+ self.assertNotIsInstance(parsed["d"], datetime.datetime)
+ self.assertEqual(parsed["mask"], 255)
+
+
+if __name__ == "__main__":
+ unittest.main()
diff --git a/Lib/test/test_tomllib_stability_aug.py b/Lib/test/test_tomllib_stability_aug.py
new file mode 100644
index 0000000000..c2387d1499
--- /dev/null
+++ b/Lib/test/test_tomllib_stability_aug.py
@@ -0,0 +1,47 @@
+import configparser
+import datetime
+import decimal
+import io
+import json
+import unittest
+
+
+class StdlibStabilityAugTest(unittest.TestCase):
+ def test_json_parse_float_callback_is_unchanged(self):
+ seen = []
+
+ def parse_float(text):
+ seen.append(text)
+ return decimal.Decimal(text)
+
+ parsed = json.loads('{"low": 1.25, "items": [2.5]}', parse_float=parse_float)
+ self.assertEqual(parsed, {"low": decimal.Decimal("1.25"), "items": [decimal.Decimal("2.5")]})
+ self.assertEqual(seen, ["1.25", "2.5"])
+
+ def test_configparser_defaults_and_interpolation_are_unchanged(self):
+ parser = configparser.ConfigParser()
+ parser.read_file(
+ io.StringIO(
+ "[DEFAULT]\n"
+ "root = /srv/app\n"
+ "\n"
+ "[service]\n"
+ "path = %(root)s/bin\n"
+ "enabled = yes\n"
+ )
+ )
+
+ self.assertEqual(parser.get("service", "path"), "/srv/app/bin")
+ self.assertTrue(parser.getboolean("service", "enabled"))
+ self.assertEqual(parser.sections(), ["service"])
+
+ def test_datetime_fromisoformat_timezone_offsets_are_unchanged(self):
+ dt = datetime.datetime.fromisoformat("2022-01-01T00:00:00+02:30")
+ self.assertEqual(dt.utcoffset(), datetime.timedelta(hours=2, minutes=30))
+
+ negative = datetime.datetime.fromisoformat("2022-01-01T00:00:00-07:00")
+ self.assertEqual(negative.utcoffset(), -datetime.timedelta(hours=7))
+
+
+if __name__ == "__main__":
+ unittest.main()
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