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https://github.com/ets-labs/python-dependency-injector.git
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49 lines
1.2 KiB
Python
49 lines
1.2 KiB
Python
"""Simple providers overriding example."""
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import dataclasses
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import unittest.mock
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from dependency_injector import containers, providers
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class ApiClient:
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...
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class ApiClientStub(ApiClient):
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...
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@dataclasses.dataclass
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class Service:
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api_client: ApiClient
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class Container(containers.DeclarativeContainer):
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api_client_factory = providers.Factory(ApiClient)
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service_factory = providers.Factory(
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Service,
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api_client=api_client_factory,
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)
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if __name__ == "__main__":
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container = Container()
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# 1. Use .override() to replace the API client with stub
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container.api_client_factory.override(providers.Factory(ApiClientStub))
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service1 = container.service_factory()
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assert isinstance(service1.api_client, ApiClientStub)
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# 2. Use .override() as a context manager to mock the API client in testing
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with container.api_client_factory.override(unittest.mock.Mock(ApiClient)):
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service2 = container.service_factory()
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assert isinstance(service2.api_client, unittest.mock.Mock)
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# 3. Use .reset_override() to get back to normal
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container.api_client_factory.reset_override()
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service3 = container.service_factory()
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assert isinstance(service3.api_client, ApiClient)
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