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: AbstractSphericalHarmonicsDistributionTest.m
    path of file: ./repos/libDirectional/lib/tests/distributions
    
    the code of the file until where you have to start completion: classdef AbstractSphericalHarmonicsDistributionTest < matlab.unittest.TestCase
    methods(Test)
        function testConvolutionDimAndMeanAndNormalization(testCa
    
function testConvolutionDimAndMeanAndNormalization(testCase)
            % Test that the function is working for differing coefficient
            % matrix sizes
            coeffMat = rand(7, 13);
            coeffMat(1) = 1 / sqrt(4*pi);
            rshdRandom = SphericalHarmonicsDistributionReal(coeffMat);
            coeffMatZonal = zeros(7, 13);
            coeffMatZonal(1) = 1 / sqrt(4*pi);
            coeffMatZonal(sub2ind(size(coeffMatZonal), 2:size(coeffMatZonal, 1), 2:size(coeffMatZonal, 1))) = rand(1, size(coeffMatZonal, 1)-1);
            cshdZonal = SphericalHarmonicsDistributionComplex(coeffMatZonal);
            
            % Test both for real and complex
            shdRandoms = {rshdRandom, rshdRandom.toSphericalHarmonicsDistributionComplex};
            shdZonals = {cshdZonal.toSphericalHarmonicsDistributionReal, cshdZonal};
            for i = 1:2
                shdRandomCurr = shdRandoms{i};
                shdZonalCurr = shdZonals{i};
                shdtmp = shdRandomCurr.convolve(shdZonalCurr);
                testCase.verifySize(shdtmp.coeffMat, [7, 13]);
                testCase.verifyEqual(shdtmp.meanDirection, shdRandomCurr.meanDirection, 'AbsTol', 1E-10);
                testCase.verifyEqual(shdtmp.meanDirection, shdRandomCurr.meanDirection, 'AbsTol', 1E-4);
                
                shdtmp = shdRandomCurr.convolve(shdZonalCurr.truncate(5));
                testCase.verifySize(shdtmp.coeffMat, [6, 11]);
                testCase.verifyEqual(shdtmp.meanDirection, shdRandomCurr.meanDirection, 'AbsTol', 1E-10);
                testCase.verifyEqual(shdtmp.integralNumerical, 1, 'AbsTol', 1E-4);
                
                shdtmp = shdRandomCurr.convolve(shdZonalCurr.truncate(4));
                testCase.verifySize(shdtmp.coeffMat, [5, 9]);
                testCase.verifyEqual(shdtmp.meanDirection, shdRandomCurr.meanDirection, 'AbsTol', 1E-10);
                testCase.verifyEqual(shdtmp.integralNumerical, 1, 'AbsTol', 1E-4);
                
                shdRandomTrunc = shdRandomCurr.truncate(5);
                shdtmp = shdRandomTrunc.convolve(shdZonalCurr);
                testCase.verifySize(shdtmp.coeffMat, [6, 11]);
                testCase.verifyEqual(shdtmp.meanDirection, shdRandomCurr.meanDirection, 'AbsTol', 1E-10);
                testCase.verifyEqual(shdtmp.integralNumerical, 1, 'AbsTol', 1E-4);
                
                shdRandomTrunc = shdRandomCurr.truncate(4);
                shdtmp = shdRandomTrunc.convolve(shdZonalCurr);
                testCase.verifySize(shdtmp.coeffMat, [5, 9]);
                testCase.verifyEqual(shdtmp.meanDirection, shdRandomCurr.meanDirection, 'AbsTol', 1E-10);
                testCase.verifyEqual(shdtmp.integralNumerical, 1, 'AbsTol', 1E-4);
            end