python-dependency-injector/tests/unit/providers/test_object_py2_py3.py

"""Object provider tests."""

from dependency_injector import providers


def test_is_provider():
    assert providers.is_provider(providers.Object(object())) is True


def test_init_optional_provides():
    instance = object()
    provider = providers.Object()
    provider.set_provides(instance)
    assert provider.provides is instance
    assert provider() is instance


def test_set_provides_returns_():
    provider = providers.Object()
    assert provider.set_provides(object()) is provider


def test_provided_instance_provider():
    provider = providers.Object(object())
    assert isinstance(provider.provided, providers.ProvidedInstance)


def test_call_object_provider():
    obj = object()
    assert providers.Object(obj)() is obj


def test_call_overridden_object_provider():
    obj1 = object()
    obj2 = object()
    provider = providers.Object(obj1)
    provider.override(providers.Object(obj2))
    assert provider() is obj2


def test_deepcopy():
    provider = providers.Object(1)

    provider_copy = providers.deepcopy(provider)

    assert provider is not provider_copy
    assert isinstance(provider, providers.Object)


def test_deepcopy_from_memo():
    provider = providers.Object(1)
    provider_copy_memo = providers.Provider()

    provider_copy = providers.deepcopy(provider, memo={id(provider): provider_copy_memo})

    assert provider_copy is provider_copy_memo


def test_deepcopy_overridden():
    provider = providers.Object(1)
    overriding_provider = providers.Provider()

    provider.override(overriding_provider)

    provider_copy = providers.deepcopy(provider)
    overriding_provider_copy = provider_copy.overridden[0]

    assert provider is not provider_copy
    assert isinstance(provider, providers.Object)

    assert overriding_provider is not overriding_provider_copy
    assert isinstance(overriding_provider_copy, providers.Provider)


def test_deepcopy_doesnt_copy_provided_object():
    # Fixes bug #231
    # Details: https://github.com/ets-labs/python-dependency-injector/issues/231
    some_object = object()
    provider = providers.Object(some_object)

    provider_copy = providers.deepcopy(provider)

    assert provider() is some_object
    assert provider_copy() is some_object


def test_repr():
    some_object = object()
    provider = providers.Object(some_object)
    assert repr(provider) == (
        "<dependency_injector.providers."
        "Object({0}) at {1}>".format(repr(some_object), hex(id(provider)))
    )