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https://github.com/ets-labs/python-dependency-injector.git
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46 lines
1.3 KiB
Python
46 lines
1.3 KiB
Python
"""Declarative IoC container overriding example."""
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import collections
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from dependency_injector import containers
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from dependency_injector import providers
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# Creating some example classes:
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Object1 = collections.namedtuple('Object1', ['arg1', 'arg2'])
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Object2 = collections.namedtuple('Object2', ['object1'])
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ExtendedObject2 = collections.namedtuple('ExtendedObject2', [])
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class Container(containers.DeclarativeContainer):
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"""Example IoC container."""
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object1_factory = providers.Factory(Object1,
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arg1=1,
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arg2=2)
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object2_factory = providers.Factory(Object2,
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object1=object1_factory)
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class OverridingContainer(containers.DeclarativeContainer):
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"""Overriding IoC container."""
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object2_factory = providers.Factory(ExtendedObject2)
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# Overriding `Container` with `OverridingContainer`:
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Container.override(OverridingContainer)
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# Creating some objects using overridden container:
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object2_1 = Container.object2_factory()
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object2_2 = Container.object2_factory()
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# Making some asserts:
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assert Container.overridden_by == (OverridingContainer,)
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assert object2_1 is not object2_2
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assert isinstance(object2_1, ExtendedObject2)
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assert isinstance(object2_2, ExtendedObject2)
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