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from dataclasses import dataclass
import inject
from test import BaseTestInject
from typing import ClassVar
class TestInjectAttr(BaseTestInject):
def test_attr_on_dataclass_class_var_raises_error(self):
with self.assertRaises(inject.InjectorException):
@dataclass
class MyClass:
field: ClassVar[int] = inject.attr(int)
class TestInjectAttrDataclass(BaseTestInject):
def test_attr_dc(self):
@dataclass
class MyClass(object):
field = inject.attr_dc(int)
inject.configure(lambda binder: binder.bind(int, 123))
my = MyClass()
value0 = my.field
value1 = my.field
assert value0 == 123
assert value1 == 123
def test_attr_on_dataclass_class_var_works(self):
@dataclass
class MyClass:
field: ClassVar[int] = inject.attr_dc(int)
inject.configure(lambda binder: binder.bind(int, 123))
assert MyClass().field == 123
assert MyClass.field == 123
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