function test26 (do_metis)
%TEST26 test logical full and sparse matrices
% Example:
%   test26
% See also cholmod_test

% Copyright 2006-2023, Timothy A. Davis, All Rights Reserved.
% SPDX-License-Identifier: GPL-2.0+

fprintf ('=================================================================\n');
fprintf ('test26: test logical full and sparse matrices\n') ;

if (nargin < 1)
    do_metis = 1 ;
end

Prob = ssget ('HB/bcsstk01') ;
A = Prob.A ;
p = amd2 (A) ;
n = size (A,1) ;
A = A (p,p) + 10*speye (n) ;
C = logical (A ~= 0) ;

test26b (A,C,do_metis) ;
test26b (full (A),C,do_metis) ;
test26b (full (A), full (C),do_metis) ;
test26b (A, full(C),do_metis) ;

A = A + 0.001 * (spones (tril (A,-1) + triu (A,1))) * 1i ;

test26b (A,C,do_metis) ;
test26b (full (A),C,do_metis) ;
test26b (full (A), full (C),do_metis) ;
test26b (A, full(C),do_metis) ;
fprintf ('test26 passed\n') ;

%-------------------------------------------------------------------------------

function test26b (A,C,do_metis)
% test26b test bisect, analyze, etree2, metis, nesdis, symbfact2, and resymbol

p1 = analyze (A) ;
p2 = analyze (C) ;
if (any (p1 ~= p2))
    error ('test 26 failed (analyze)!') ;
end

p1 = etree2 (A) ;
p2 = etree2 (C) ;
if (any (p1 ~= p2))
    error ('test 26 failed (etree2)!') ;
end

if (do_metis)

    s1 = bisect (A) ;
    s2 = bisect (C) ;
    if (any (s1 ~= s2))
        error ('test 26 failed (bisect)!') ;
    end

    p1 = metis (A) ;
    p2 = metis (C) ;
    if (any (p1 ~= p2))
        error ('test 26 failed (metis)!') ;
    end

    p1 = nesdis (A) ;
    p2 = nesdis (C) ;
    if (any (p1 ~= p2))
        error ('test 26 failed (nesdis)!') ;
    end

end

c1 = symbfact2 (A) ;
c2 = symbfact2 (C) ;
if (any (c1 ~= c2))
    error ('test 26 failed (symbfact2)!') ;
end

A (1,2) = 0 ;
A (2,1) = 0 ;
C = logical (A ~= 0) ;

L = chol (sparse (A))' ;
L1 = resymbol (L, A) ;
L2 = resymbol (L, C) ;
if (norm (L1 - L2, 1) ~= 0)
    error ('test 26 failed (resymbol)!') ;
end