You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: test_cross.m
    path of file: ./repos/chebfun/tests/diskfunv
    
    the code of the file until where you have to start completion: function pass = test_cross( ) 
% Test cross product

tol = 1e3*chebfunpref().cheb2Prefs.chebfun2eps;

% Test cross product of empty diskfunv.

    
function pass = test_cross( ) 
% Test cross product

tol = 1e3*chebfunpref().cheb2Prefs.chebfun2eps;

% Test cross product of empty diskfunv.
f = diskfunv;
g = diskfunv;
h = cross(f,g);

pass(1) = isempty(h);

%check definition
F = diskfunv(@(x,y) cos(x), @(x,y) sin(y)); 
G = diskfunv(@(x,y) x, @(x,y) y); 
crossF = F(1) .* G(2) - F(2) .* G(1);
pass(2) = ( norm(cross(F,G) - crossF) < tol );

% Test that the cross product of the same vector valued function is zero.
f = diskfun(@(x,y) cos((x+.1).*y));
u = grad(f);
h = cross(u,u);
pass(3) = norm(h) < tol;

end