tests/extended_powell_gradient1_tests.m

   1 ## The gradient should be zero at the optimal point.
   2
   3 for m = [ 1 : 10 ]
   4   x = repmat([0;0;0;0], m, 1);
   5
   6   msg = sprintf("extended_powell_gradient1([0;0;0;0;...]) == 0 (m = %d)", m);
   7   unit_test_equals(msg, 0, extended_powell_gradient1(x));
   8 end
   9
  10 ## It should fail with the wrong number of coordinates.
  11 g = extended_powell_gradient1([1;2;3]);
  12 msg = "extended_powell_gradient1 fails when length(x) is odd";
  13 unit_test_equals(msg, true, isna(g));