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Implement lazy initialization and improve copying for Object provider
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@ -79,7 +79,9 @@ class Provider(Generic[T]):
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class Object(Provider[T]):
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class Object(Provider[T]):
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def __init__(self, provides: T) -> None: ...
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def __init__(self, provides: Optional[T] = None) -> None: ...
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def provides(self) -> Optional[T]: ...
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def set_provides(self, provides: Optional[T]) -> Object: ...
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class Self(Provider[T]):
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class Self(Provider[T]):
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@ -400,13 +400,10 @@ cdef class Object(Provider):
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:type: object
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:type: object
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"""
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"""
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def __init__(self, provides):
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def __init__(self, provides=None):
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"""Initializer.
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"""Initialize provider."""
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self.__provides = None
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:param provides: Value that have to be provided.
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self.set_provides(provides)
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:type provides: object
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"""
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self.__provides = provides
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super(Object, self).__init__()
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super(Object, self).__init__()
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def __deepcopy__(self, memo):
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def __deepcopy__(self, memo):
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@ -415,7 +412,8 @@ cdef class Object(Provider):
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if copied is not None:
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if copied is not None:
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return copied
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return copied
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copied = self.__class__(self.__provides)
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copied = _memorized_duplicate(self, memo)
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copied.set_provides(self.provides)
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self._copy_overridings(copied, memo)
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self._copy_overridings(copied, memo)
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@ -435,6 +433,16 @@ cdef class Object(Provider):
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"""
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"""
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return self.__str__()
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return self.__str__()
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@property
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def provides(self):
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"""Return provider's provides."""
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return self.__provides
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def set_provides(self, provides):
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"""Set provider's provides."""
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self.__provides = provides
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return self
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@property
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@property
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def related(self):
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def related(self):
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"""Return related providers generator."""
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"""Return related providers generator."""
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@ -152,6 +152,17 @@ class ObjectProviderTests(unittest.TestCase):
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def test_is_provider(self):
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def test_is_provider(self):
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self.assertTrue(providers.is_provider(providers.Object(object())))
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self.assertTrue(providers.is_provider(providers.Object(object())))
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def test_init_optional_provides(self):
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instance = object()
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provider = providers.Object()
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provider.set_provides(instance)
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self.assertIs(provider.provides, instance)
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self.assertIs(provider(), instance)
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def test_set_provides_returns_self(self):
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provider = providers.Object()
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self.assertIs(provider.set_provides(object()), provider)
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def test_provided_instance_provider(self):
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def test_provided_instance_provider(self):
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provider = providers.Object(object())
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provider = providers.Object(object())
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self.assertIsInstance(provider.provided, providers.ProvidedInstance)
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self.assertIsInstance(provider.provided, providers.ProvidedInstance)
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