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## Test if function handles correctly dispatch to class methods while keeping
## a link to the original function file.
%!test <*59451>
%! dpi = pi;
%! spi = single (pi);
%! ## Create function handle
%! fh = @bug59451;
%! ## All of these must dispatch to the corresponding function file.
%! assert (fh (dpi, dpi), "none");
%! assert (fh (dpi, spi), "none");
%! assert (fh (spi, spi), "none");
%! assert (fh (spi, dpi), "none");
%! assert (fh ({}, {}), "none");
%! ## cd to a directory that contains class overloads
%! cd foo
%! ## The overloads must take precedence.
%! assert (fh (dpi, dpi), "double");
%! assert (fh (dpi, spi), "single");
%! assert (fh (spi, spi), "single");
%! assert (fh (spi, dpi), "single");
%! ## This must still dispatch to the original function file.
%! assert (fh ({}, {}), "none");