function test188
%TEST188 test concat

% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2021, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0

fprintf ('test188 ----------- C = concat (Tiles)\n') ;

[~, ~, ~, types, ~, ~] = GB_spec_opsall ;
types = types.all ;

rng ('default') ;

n1 = 20 ;
n2 = 4 ;

for d = [1e-4 0.01 0.2 0.8 inf]
    fprintf ('\nd = %g\n', d) ;
    for ka = 1:length (types)
        atype = types {ka} ;
        A1 = GB_spec_random (n1, n1, d, 128, atype) ;
        A2 = GB_spec_random (n1, n2, d, 128, atype) ;
        A3 = GB_spec_random (n2, n1, d, 128, atype) ;
        if (ka == 11)
            A4 = GB_spec_random (n2, n2, inf, 128, atype) ;
        else
            A4 = GB_spec_random (n2, n2, d, 128, atype) ;
        end

        for sparsity_control = [1 2 4 8]
            fprintf ('.') ;
            A1.sparsity = sparsity_control ;
            A2.sparsity = sparsity_control ;
            A3.sparsity = sparsity_control ;
            if (ka == 11)
                A4.sparsity = 8 ;
            else
                A4.sparsity = sparsity_control ;
            end
            for is_csc = [0 1]
                A1.is_csc = is_csc ;
                A2.is_csc = is_csc ;
                A3.is_csc = is_csc ;
                A4.is_csc = is_csc ;

                Tiles = cell (2,2) ;
                Tiles {1,1} = A1 ;
                Tiles {1,2} = A2 ;
                Tiles {2,1} = A3 ;
                Tiles {2,2} = A4 ;

                for kc = 1:length (types)
                    ctype = types {kc} ;
                    for fmt = 0:1
                        C1 = GB_mex_concat  (Tiles, ctype, fmt) ;
                        C2 = GB_spec_concat (Tiles, ctype) ;
                        GB_spec_compare (C1, C2) ;
                    end
                end
            end
        end
    end
end

fprintf ('\n') ;
GrB.burble (0) ;
fprintf ('test188: all tests passed\n') ;

