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Update provider overriding example to use container and fix bug

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This commit is contained in:
Roman Mogylatov 2020-09-03 17:42:15 -04:00
parent d61281a0b9
commit 4f111aae9b
1 changed files with 21 additions and 15 deletions
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36
examples/providers/overriding.py
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@ -1,8 +1,9 @@
"""Simple providers overriding example.""" """Simple providers overriding example."""
import dataclasses
import unittest.mock import unittest.mock
from dependency_injector import providers from dependency_injector import containers, providers
class ApiClient: class ApiClient:
@ -13,30 +14,35 @@ class ApiClientStub(ApiClient):
... ...
@dataclasses.dataclass
class Service: class Service:
def __init__(self, api_client: ApiClient): api_client: ApiClient
self._api_client = api_client
api_client_factory = providers.Factory(ApiClient) class Container(containers.DeclarativeContainer):
service_factory = providers.Factory(
Service, api_client_factory = providers.Factory(ApiClient)
api_client=api_client_factory,
) service_factory = providers.Factory(
Service,
api_client=api_client_factory,
)
if __name__ == '__main__': if __name__ == '__main__':
container = Container()
# 1. Use .override() to replace the API client with stub # 1. Use .override() to replace the API client with stub
api_client_factory.override(providers.Factory(ApiClientStub)) container.api_client_factory.override(providers.Factory(ApiClientStub))
service1 = service_factory() service1 = container.service_factory()
assert isinstance(service1.api_client, ApiClientStub) assert isinstance(service1.api_client, ApiClientStub)
# 2. Use .override() as a context manager to mock the API client in testing # 2. Use .override() as a context manager to mock the API client in testing
with api_client_factory.override(unittest.mock.Mock(ApiClient)): with container.api_client_factory.override(unittest.mock.Mock(ApiClient)):
service3 = service_factory() service2 = container.service_factory()
assert isinstance(service3.api_client, unittest.mock.Mock) assert isinstance(service2.api_client, unittest.mock.Mock)
# 3. Use .reset_override() to get back to normal # 3. Use .reset_override() to get back to normal
api_client_factory.reset_override() container.api_client_factory.reset_override()
service3 = service_factory() service3 = container.service_factory()
assert isinstance(service3.api_client, ApiClient) assert isinstance(service3.api_client, ApiClient)