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)
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_n2(self):
x = 0.123
a = nthderiv.log1p(x, n=2)
b = -1 / np.square(x + 1)
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_n0(self):
x = 0.123
a = nthderiv.log1p(x, n=0)
b = np.log1p(x)
assert_allclose(a, b)
