def test_missing_default():
@dataclass
class Config:
param: Optional[int] = field(default=_DEFAULT, )
cfg = Config()
with pytest.raises(KeyError):
_with_defaults(cfg, 'my-default')
def test_default_none():
@dataclass
class Config:
param: Optional[int] = field(
default=_DEFAULT,
metadata={
'my-default': None,
},
)
cfg = Config()
assert cfg.param is _DEFAULT
cfg_with_defaults = _with_defaults(cfg, 'my-default')
assert cfg_with_defaults.param is None
def test_change_default():
# all params should be optional
@dataclass
class Config:
foo: Optional[float] = field(
default=cast(None, _DEFAULT),
metadata={
'validate': _optional(_chain(_of_type(int, float), _positive)),
'test-default': 1234,
},
)
def __post_init__(self):
_validate(self)
assert _with_defaults(Config(foo=1), 'test-default').foo == 1
def test_configuration():
# all params should be optional
config = Configuration()
_with_defaults(config, 'client-default')
_with_defaults(config, 'server-default')
