def test_log1p_n3(self): x = 0.123 a = nthderiv.log1p(x, n=3) b = 2 / np.power(x + 1, 3) assert_allclose(a, b)
def test_log1p_n1(self): x = 0.123 a = nthderiv.log1p(x, n=1) b = 1 / (x + 1) assert_allclose(a, b)
def test_log1p_n2(self): x = 0.123 a = nthderiv.log1p(x, n=2) b = -1 / np.square(x + 1) assert_allclose(a, b)
def test_log1p_n0(self): x = 0.123 a = nthderiv.log1p(x, n=0) b = np.log1p(x) assert_allclose(a, b)