def test_attribute_descriptor1():
assert not hasattr(attribute_descriptor('name', default=10), "check")
class Foo:
name = attribute_descriptor("name",
default=10,
content_type=int,
nullable=False,
constraint=lambda x: x % 10 == 0)
x = Foo()
assert x.name == 10
x.name = 30
assert x.name == 30
with pytest.raises(ValueError):
x.name = 3
with pytest.raises(TypeError):
x.name = "asdas"
with pytest.raises(TypeError):
x.name = 3.4
with pytest.raises(ValueError):
x.name = None
del x.name
assert x.name == 10 # back to the default value
def test_attribute_descriptor1():
assert not hasattr(attribute_descriptor('name', default=10), "check")
class Foo:
name = attribute_descriptor("name", default=10, content_type=int,
nullable=False, constraint=lambda x: x%10==0)
x = Foo()
assert x.name == 10
x.name = 30
assert x.name == 30
with pytest.raises(ValueError):
x.name = 3
with pytest.raises(TypeError):
x.name = "asdas"
with pytest.raises(TypeError):
x.name = 3.4
with pytest.raises(ValueError):
x.name = None
del x.name
assert x.name==10 # back to the default value
class Foo:
a = attribute_descriptor('a', content_type=int, nullable=False)
class Foo:
x = attribute_descriptor("x",
default=10,
content_type=(int, float),
nullable=True)
class Foo:
a = attribute_descriptor("name",
default=10,
content_type=int,
nullable=True,
constraint=lambda x: x % 10 == 0)