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_alias.m
    path of file: ./repos/chebfun/tests/chebtech1
    
    the code of the file until where you have to start completion: % Test file for chebtech/alias.m

function pass = test_alias(varargin)

% Set a tolerance (pref.chebfuneps doesn't matter)
tol = 2e2*eps;

%%
% Testing a vector of coefficients.
c0 = (10:-1:1)';

% Padding:
c1 = chebtech1.alias(c0, 11);
pass(1) = norm([ c0; 
    
function pass = test_alias(varargin)

% Set a tolerance (pref.chebfuneps doesn't matter)
tol = 2e2*eps;

%%
% Testing a vector of coefficients.
c0 = (10:-1:1)';

% Padding:
c1 = chebtech1.alias(c0, 11);
pass(1) = norm([ c0; 0 ] - c1, inf) == 0;

% Aliasing:
c2 = chebtech1.alias(c0, 9);
pass(2) = norm((10:-1:2)' - c2, inf) == 0;
c3 = chebtech1.alias(c0, 3);
pass(3) = norm([6 1 0]' - c3, inf) == 0;

% Compare against result of evaluating on a smaller grid:
pass(4) = norm(chebtech1.vals2coeffs( ...
    chebtech.clenshaw(chebtech1.chebpts(9), c0)) - c2, inf) < tol;
pass(5) = norm(chebtech1.vals2coeffs( ...
    chebtech.clenshaw(chebtech1.chebpts(3), c0)) - c3, inf) < tol;


%%
% Testing a matrix of coefficients.
cc = [c0 c0(end