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bpo-33805: Improve error message of dataclasses.replace() (GH-7580)

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Dong-hee Na 2018-06-23 23:46:32 +09:00 • committed by Eric V. Smith
parent 66ecefcfe7
commit 3d70f7aef6
3 changed files with 20 additions and 0 deletions
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16
Lib/test/test_dataclasses.py
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@ -3024,6 +3024,22 @@ class TestReplace(unittest.TestCase):
replace(c, x=5)
def test_initvar_is_specified(self):
@dataclass
class C:
x: int
y: InitVar[int]
def __post_init__(self, y):
self.x *= y
c = C(1, 10)
self.assertEqual(c.x, 10)
with self.assertRaisesRegex(ValueError, r"InitVar 'y' must be "
"specified with replace()"):
replace(c, x=3)
c = replace(c, x=3, y=5)
self.assertEqual(c.x, 15)
## def test_initvar(self):
## @dataclass
## class C: