def test_ADmath_logr():
f = ADmath.log(72)
assert f == np.log(72)
def test_5x2lnx():
x = ADnum(1, der=1)
f = 5 * x**2 * ADmath.log(x)
assert f.val == 0.0
assert f.der == 10 * 1.0 * np.log(1.0) + 5 * 1.0
def test_ADmath_log():
f = ADmath.log(ADnum(72, der=1))
assert f.val == np.log(72)
assert f.der == 1 / 72
assert len(f.graph) == 1