def test_approx(self):
x = np.arange(10, 50, 0.1)
n = 5
j = sph_bessel.jn(n, x)
approx_j = sph_bessel.approx_jn(n, x)
#plt.plot(x, j)
#plt.plot(x, approx_j)
#plt.plot(x, approx_j-j)
#plt.show()
self.assertTrue(np.allclose(j, approx_j, atol=0.003))
def test_jn(self):
n = 1234
x = 2300.
right_ans = special.sph_jn(n, x)[0][-1]
j = sph_bessel.jn(n, x)
self.assertTrue(np.allclose(j, right_ans))
def test_j0(self):
x = np.arange(1, 1000) / 10.
right_ans = np.sin(x) / x
sph_j0 = sph_bessel.jn(0, x)
self.assertTrue(np.allclose(sph_j0, right_ans))