def METHOD_NAME(self):
    """
    Test access to degrees of freedom, its setter
    """
    # Init from SPEC input file
    filename = os.path.join(TEST_DIR, 'Dommaschk.sp')
    normal_field = NormalField.from_spec(filename)
    # Get dofs
    dofs = normal_field.local_full_x
    # Check size of array
    self.assertEqual(dofs.size, normal_field.ndof)
    # Check value of an element
    m = 5
    n = 1
    ii = normal_field.get_index_in_dofs(m=m, n=n)
    self.assertEqual(dofs[ii], normal_field.get_vns(m=m, n=n))
    # Set dofs to zeros
    # ... Check test of size
    with self.assertRaises(DofLengthMismatchError):
        normal_field.local_full_x = np.zeros((normal_field.ndof - 1,))
    # ... Actually set them to zeros
    normal_field.local_full_x = np.zeros((normal_field.ndof,)) 
    dofs = normal_field.local_full_x
    for el in dofs:
        self.assertEqual(el, 0)