def test_the_container_can_be_nested_though_this_has_no_meaning():
original = ContextContainer(container, context_types=[SomeDep])
with original as context_container_1:
a = context_container_1.resolve(SomeDep)
with context_container_1 as context_container_2:
b = context_container_2.resolve(SomeDep)
assert a != b
def test_the_container_can_be_reused():
original = ContextContainer(container, context_types=[SomeDep])
with original as context_container_1:
a = context_container_1.resolve(SomeDep)
with original as context_container_2:
b = context_container_2.resolve(SomeDep)
assert a != b
def test_clean_up_of_loaded_contexts_happens_on_container_exit():
SomeDep.global_clean_up_has_happened = False
with ContextContainer(container,
context_types=[SomeDep]) as context_container:
assert isinstance(context_container[SomeDep], SomeDep)
assert not SomeDep.global_clean_up_has_happened
assert SomeDep.global_clean_up_has_happened
def test_it_fails_if_the_dependencies_arent_defined_correctly():
with pytest.raises(InvalidDependencyDefinition) as failure:
with ContextContainer(container,
context_types=[SomeNotProperlySetupDef
]) as context_container:
context_container.resolve(SomeNotProperlySetupDef)
assert f"A ContextManager[{SomeNotProperlySetupDef}] should be defined" in str(
failure.value)
def test_context_instances_can_be_made_singletons():
SomeDep.global_clean_up_has_happened = False
with ContextContainer(container,
context_types=[],
context_singletons=[SomeDep]) as context_container:
one = context_container[SomeDep]
two = context_container[SomeDep]
assert one is two
assert SomeDep.global_clean_up_has_happened
def test_it_works_with_actual_context_managers():
class ThingManager:
def __enter__(self):
return Thing("managed thing")
def __exit__(self, exc_type, exc_val, exc_tb):
pass
container[ContextManager[Thing]] = ThingManager # type: ignore
with ContextContainer(container,
context_types=[Thing]) as context_container:
assert context_container.resolve(Thing).contents == "managed thing"
def test_context_instances_are_not_singletons():
with ContextContainer(container,
context_types=[SomeDep]) as context_container:
one = context_container[SomeDep]
two = context_container[SomeDep]
assert one is not two