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_scaleInvariance.m
    path of file: ./repos/chebfun/tests/trigtech
    
    the code of the file until where you have to start completion: % Test vertical scale invariance of TRIGTECH construction.

function pass = test_scaleInvariance(pref)

% Get preferences.
if ( nargin == 0 )
    pref = trigtech.techPref();
end

testclass = trigtech();

%% 
% Test CLASSICCHECK.
pref.happinessC
    
function and make a TRIGTECH.
F = @(x) sin(10*pi*x);
f = testclass.make(F, [], pref);

% Require scale*TRIGTECH(f) = TRIGTECH(scale*f)).
scale = 2^300;
f1 = testclass.make(@(x) F(x)*scale, [], pref);
pass(1) = ~any(f.coeffs - f1.coeffs/scale);

% Require TRIGTECH(f)/scale = TRIGTECH(f/scale).
f2 = testclass.make(@(x) F(x)/scale, [], pref);
pass(2) = ~any(f.coeffs - f2.coeffs*scale);

%% 
% Test STRICTCHECK. (No STRICTCHECK for the moment for TRIGTECH objects.)

end