def test_known_values(self):
'''
polarisation_tensor_basis should give known result
'''
for xy, tensors in self.known_values:
x, y = xy
expected_eplus, expected_ecros = tensors
eplus = ETwaves.polarisation_tensor_basis(x, y, pol = '+')
ecros = ETwaves.polarisation_tensor_basis(x, y, pol = 'x')
self.assertTrue(np.allclose(expected_eplus, eplus))
self.assertTrue(np.allclose(expected_ecros, ecros))
