def METHOD_NAME(self):
    assert_(
        self.g.payoff_arrays[0][0, 0] + self.g.payoff_arrays[1][0, 0] == 1.
    )
    for payoff_array in self.g.payoff_arrays:
        assert_(np.isin(payoff_array[0, :], [0, 1, 0.5]).all())