classdef FormatHexFixture < matlab.unittest.fixtures.Fixture
    properties (Access=private)
        OriginalFormat
    end
    methods
        function setup(fixture)
            fixture.OriginalFormat = get(0,'Format');
            set(0,'Format','hex')
            fixture.addTeardown(@set,0,'Format',fixture.OriginalFormat)
            
            fixture.onFailure(['Failure detected in ' mfilename('class')])
            fixture.assertEqual(get(0,'Format'),'short')
        end
    end
end

classdef SampleTest < matlab.unittest.TestCase
    methods (Test)
        function test1(testCase)
            testCase.applyFixture(FormatHexFixture);
            actStr = getColumnForDisplay([1;2;3], 'Small Integers');
            expStr = ['Small Integers  '
                '3ff0000000000000'
                '4000000000000000'
                '4008000000000000'];
            testCase.verifyEqual(actStr, expStr)
        end
    end
end

function str = getColumnForDisplay(values, title)
elements = cell(numel(values)+1, 1);
elements{1} = title;
for idx = 1:numel(values)
    elements{idx+1} = displayNumber(values(idx));
end
str = char(elements);
end

function str = displayNumber(n)
str = strtrim(evalc('disp(n);'));
end

results = runtests('SampleFixtureTest');