def test_log_AccumBounds(): assert log(AccumBounds(1, E)) == AccumBounds(0, 1)
def test_AccumBounds(): a = Symbol('a', real=True) assert str(AccumBounds(0, a)) == "AccumBounds(0, a)" assert str(AccumBounds(0, 1)) == "AccumBounds(0, 1)"
def test_exp_AccumBounds(): assert exp(AccumBounds(1, 2)) == AccumBounds(E, E**2)