def test_spawn():
desc = 'foo'
f = Field(description=desc)
f1 = f.spawn(required=True)
# test spawn attributes are changed
assert f.required is False
assert f1.required is True
assert f.description == f1.description
# test spawn instances do not share key attr
assert f.key is None
class P0(ParamSet):
key0 = f
assert f.key == 'key0'
class P1(ParamSet):
key1 = f.spawn(null=True)
assert f.key == 'key0'
f.spawn(key='key2')
assert f.key == 'key0'
def test_spawn():
desc = 'foo'
f = Field(description=desc)
f1 = f.spawn(required=True)
assert f.required is False
assert f1.required is True
assert f.description == f1.description
def test_field_null_values():
f0 = Field(null_values=(None, 0), null=True)
assert None is f0.validate(None)
assert None is f0.validate(0)
assert '' == f0.validate('')
f1 = f0.spawn(null=False)
with pytest.raises(ValueError):
f1.validate(None)
with pytest.raises(ValueError):
f1.validate(0)
assert '' == f0.validate('')
# though null is not allowed, value will never be determined as null, so `null=False` won't take any effect
f2 = Field(null_values=(), null=False)
assert None is f2.validate(None)