def test_replace_all_paths_doesnt_change_nodes():
nodes = ['nod1', 'nod2', 'nod3']
db.replace_all_nodes(nodes)
paths = [['nod1', 'edge1', 'nod2'], ['nod2', 'edge2', 'nod3']]
db.replace_all_paths(paths)
assert 3 == db.count_nodes()
assert 2 == db.count_paths()
def test_replace_all_paths_with_two_paths():
paths = [['nod1', 'edge1', 'nod2'], ['nod2', 'edge2', 'nod3']]
db.replace_all_paths(paths)
assert 2 == db.count_paths()
