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: TestDistanceTransform.m
    path of file: ./repos/mexopencv/test/unit_tests
    
    the code of the file until where you have to start completion: classdef TestDistanceTransform
    %TestDistanceTransform

    methods (Static)
        function test_correctness
            img = uint8([...
                0 0 0 0 0 0 0 0 0 0;...
                0 0 0 0 0 0 0 0 
    
function test_correctness
            img = uint8([...
                0 0 0 0 0 0 0 0 0 0;...
                0 0 0 0 0 0 0 0 0 0;...
                0 0 0 0 0 0 0 0 0 0;...
                0 0 0 1 1 1 0 0 0 0;...
                0 0 0 1 1 1 0 0 0 0;...
                0 0 0 1 1 1 0 0 0 0;...
                0 0 0 0 0 0 0 0 0 0;...
                0 0 0 0 0 0 0 0 0 0;...
                0 0 0 0 0 0 0 0 0 0;...
                0 0 0 0 0 0 0 0 0 0;...
            ]);
            rslt = single([...
                0 0 0 0 0 0 0 0 0 0;...
                0 0 0 0 0 0 0 0 0 0;...
                0 0 0 0 0 0 0 0 0 0;...
                0 0 0 1 1 1 0 0 0 0;...
                0 0 0 1 2 1 0 0 0 0;...
                0 0 0 1 1 1 0 0 0 0;...
                0 0 0 0 0 0 0 0 0 0;...
                0 0 0 0 0 0 0 0 0 0;...
                0 0 0 0 0 0 0 0 0 0;...
                0 0 0 0 0 0 0 0 0 0;...
            ]);
            result = cv.distanceTransform(img, ...
                'DistanceType','L1', 'MaskSize',3, 'DstType','single');
            assert(isequal(rslt,result));
        end