Abdelrahman Said
78 lines
3.8 KiB
C
78 lines
3.8 KiB
C
/*
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igraph library.
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Copyright (C) 2023 The igraph development team <igraph@igraph.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <igraph.h>
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#include <float.h>
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#include "test_utilities.h"
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int main(void) {
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/* Test "normal" cases */
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IGRAPH_ASSERT(igraph_cmp_epsilon(1, 2, 0.25) < 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(1, 2, 0.5) == 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(2, 1, 0.25) > 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(2, 1, 0.5) == 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(10, 11, 0.25) == 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(10, 11, 0.5) == 0);
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/* Test infinities. Infinities are not equal to finite numbers with any
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* tolerance */
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_INFINITY, 2, 0.5) > 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_INFINITY, 2, 20) > 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_INFINITY, 2, 200) > 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(-IGRAPH_INFINITY, 2, 0.5) < 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(-IGRAPH_INFINITY, 2, 20) < 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(-IGRAPH_INFINITY, 2, 200) < 0);
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/* Infinities may be equal, though */
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_INFINITY, IGRAPH_INFINITY, 0.5) == 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_INFINITY, IGRAPH_INFINITY, 0.1) == 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_INFINITY, IGRAPH_INFINITY, 1e-7) == 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_INFINITY, -IGRAPH_INFINITY, 0.5) > 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_INFINITY, -IGRAPH_INFINITY, 0.1) > 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_INFINITY, -IGRAPH_INFINITY, 1e-7) > 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(-IGRAPH_INFINITY, IGRAPH_INFINITY, 0.5) < 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(-IGRAPH_INFINITY, IGRAPH_INFINITY, 0.1) < 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(-IGRAPH_INFINITY, IGRAPH_INFINITY, 1e-7) < 0);
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/* NaNs are not equal to anything, not even each other. Sign of the result
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* is not guaranteed */
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_INFINITY, IGRAPH_NAN, 0.1) != 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(-IGRAPH_INFINITY, IGRAPH_NAN, 0.1) != 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(0, IGRAPH_NAN, 1e-7) != 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_NAN, 0, 1e-7) != 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_NAN, IGRAPH_NAN, 1e-7) != 0);
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/* Comparison with zero tolerance should be a "strict" comparison */
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IGRAPH_ASSERT(igraph_cmp_epsilon(1, 2, 0) < 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(2, 1, 0) > 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(2, 2, 0) == 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(0, DBL_MIN, 0) < 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(DBL_MIN, 0, 0) > 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(-IGRAPH_INFINITY, 0, 0) < 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(-IGRAPH_INFINITY, -IGRAPH_INFINITY, 0) == 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_INFINITY, 0, 0) > 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_INFINITY, IGRAPH_INFINITY, 0) == 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_NAN, 0, 0) != 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_NAN, IGRAPH_NAN, 0) != 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_NAN, IGRAPH_INFINITY, 0) != 0);
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IGRAPH_ASSERT(igraph_cmp_epsilon(IGRAPH_NAN, -IGRAPH_INFINITY, 0) != 0);
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return 0;
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}
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