def METHOD_NAME(self):
    """Betweenness centrality: P4 normalized"""
    G = nx.path_graph(4)
    b = nx.current_flow_betweenness_centrality_subset(
        G, list(G), list(G), normalized=True
    )
    b_answer = nx.current_flow_betweenness_centrality(G, normalized=True)
    for n in sorted(G):
        assert b[n] == pytest.approx(b_answer[n], abs=1e-7)