def test_engine_cannot_find_task_by_id_if_not_saved():
"""
Test that *unsaved* tasks are cannot be retrieved from the Engine given their ID only.
"""
with temporary_core() as core:
with temporary_directory() as tmpdir:
store = FilesystemStore(tmpdir)
engine = Engine(core, store=store)
task = SuccessfulApp()
engine.add(task)
store.save(task) # guarantee it has a `.persistent_id`
task_id = task.persistent_id
with pytest.raises(KeyError):
engine.find_task_by_id(task_id)
def test_engine_find_task_by_id():
"""
Test that saved tasks are can be retrieved from the Engine given their ID only.
"""
with temporary_core() as core:
with temporary_directory() as tmpdir:
store = FilesystemStore(tmpdir)
engine = Engine(core, store=store)
task = SuccessfulApp()
store.save(task)
engine.add(task)
task_id = task.persistent_id
assert engine.find_task_by_id(task_id) == task
