def test_load_json(self):
js = json.dumps(test_graph)
g = Graph.from_json(js)
js2 = g.to_json()
def test_load_tikz(self):
js = json.dumps(test_graph)
g = Graph.from_json(js)
tikz = g.to_tikz()
g2 = Graph.from_tikz(tikz, warn_overlap=False)
