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    filename: test115.m
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%TEST115 test GB_assign, scalar expansion and zombies, with duplicates

% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2023, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0

rng ('default') ;


    
function test115
%TEST115 test GB_assign, scalar expansion and zombies, with duplicates

% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2023, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0

rng ('default') ;

    n = 200 ;
    C = sparse (rand (n)) ;
    C (:,1) = sparse (rand (n,1) > 0.5) ;

    ntrials = 10 ;

    for k = 1:2:ntrials

        % make some zombies
        Work (k).A = sprandn (n, n, 0.1) ;
        Work (k).I = [ ] ;
        Work (k).J = [ ] ;
        Work (k).Mask = sparse (ones (n)) ;
        Work (k).accum = [ ] ;
        Work (k).desc = [ ] ;
        Work (k).scalar = 0 ;

        % scalar expansion
        if (rand (1) > 0.5)
            % use non-opaque scalar
            Work (k+1).A = sparse (pi) ;
            use_GrB_Scalar = 1 ;
        else
            % use GrB_Scalar
            Work (k+1).A = sparse (pi * (rand(1) > 0.5)) ;
            use_GrB_Scalar = 2 ;
        end