def test_persist():
state = State(last_item_id='4')
state.persist() #store ro disk
restored_state = State() #loads from disk
assert restored_state.last_item_id == '4'
restored_state.setLastItemId('6') #also persist
restored_second_state = State() #loads from disk
assert restored_second_state.last_item_id == '6'
def test_persist_invalid_path():
state = State(last_item_id='4', persit_path='/invalid_path/mock.obj')
state.persist() #should persist to disk but fails due to bad path
restored_state = State() #loads from disk
assert restored_state.last_item_id == '' #value lost - due to invalid persist path