Add additional keyword-only tests. (GH-25633)
diff --git a/Lib/test/test_dataclasses.py b/Lib/test/test_dataclasses.py
index edb0848..670648a 100644
--- a/Lib/test/test_dataclasses.py
+++ b/Lib/test/test_dataclasses.py
@@ -3502,7 +3502,7 @@ def test_make_dataclasses(self):
self.assertEqual(C.__match_args__, ('z',))
-class TestKwArgs(unittest.TestCase):
+class TestKeywordArgs(unittest.TestCase):
def test_no_classvar_kwarg(self):
msg = 'field a is a ClassVar but specifies kw_only'
with self.assertRaisesRegex(TypeError, msg):
@@ -3659,6 +3659,34 @@ def __post_init__(self, b, d):
b = B(1, c=2, b=3, d=4)
self.assertEqual(asdict(b), {'a': 3, 'c': 4})
+ def test_defaults(self):
+ # For kwargs, make sure we can have defaults after non-defaults.
+ @dataclass
+ class A:
+ a: int = 0
+ _: KW_ONLY
+ b: int
+ c: int = 1
+ d: int
+
+ a = A(d=4, b=3)
+ self.assertEqual(a.a, 0)
+ self.assertEqual(a.b, 3)
+ self.assertEqual(a.c, 1)
+ self.assertEqual(a.d, 4)
+
+ # Make sure we still check for non-kwarg non-defaults not following
+ # defaults.
+ err_regex = "non-default argument 'z' follows default argument"
+ with self.assertRaisesRegex(TypeError, err_regex):
+ @dataclass
+ class A:
+ a: int = 0
+ z: int
+ _: KW_ONLY
+ b: int
+ c: int = 1
+ d: int
if __name__ == '__main__':
unittest.main()