function b = test_test(a)
  b = a
endfunction

%!test
%!function x = fn(z)
%!  x = z;
%!endfunction
%! assert(0, 1)

%!function x = fn(z)
%!  x = z;
%!endfunction
%!test
%! assert(fn(1), 1)


%!test
%! assert(fn(2), 2)