Add test cases for dataclasses. (#17909)
* Add test cases for dataclasses.
* Add test for repr output of field.
* Add test for ValueError to be raised when both default and default_factory are passed.
diff --git a/Lib/test/test_dataclasses.py b/Lib/test/test_dataclasses.py
index 8f9fb2c..e8fe455 100644
--- a/Lib/test/test_dataclasses.py
+++ b/Lib/test/test_dataclasses.py
@@ -45,6 +45,25 @@
o = C(42)
self.assertEqual(o.x, 42)
+ def test_field_default_default_factory_error(self):
+ msg = "cannot specify both default and default_factory"
+ with self.assertRaisesRegex(ValueError, msg):
+ @dataclass
+ class C:
+ x: int = field(default=1, default_factory=int)
+
+ def test_field_repr(self):
+ int_field = field(default=1, init=True, repr=False)
+ int_field.name = "id"
+ repr_output = repr(int_field)
+ expected_output = "Field(name='id',type=None," \
+ f"default=1,default_factory={MISSING!r}," \
+ "init=True,repr=False,hash=None," \
+ "compare=True,metadata=mappingproxy({})," \
+ "_field_type=None)"
+
+ self.assertEqual(repr_output, expected_output)
+
def test_named_init_params(self):
@dataclass
class C: