def METHOD_NAME(self):
    effective_size = nx.effective_size(self.G)
    assert effective_size["G"] == pytest.approx(4.67, abs=1e-2)
    assert effective_size["A"] == pytest.approx(2.50, abs=1e-2)
    assert effective_size["C"] == pytest.approx(1, abs=1e-2)