#!/usr/bin/env python
from __future__ import print_function
from __future__ import unicode_literals


def test_init(self):
    return


def test_nodes():
    return nodes


def test_edges():
    return edges


def test_add_node(value):
    return


def test_add_edge(value1, value2):
    return


def test_del_node(value):
    return


def test_has_node(value):
    return


def test_neighbors(value):
    return neighbors


def test_adjecent(value, value2):
    return condition

initialize graph test file.