tests/test-fabs.c

   1 /* Test of fabs() function.
   2    Copyright (C) 2010-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2010.  */
  18
  19 #include <config.h>
  20
  21 #include <math.h>
  22
  23 #include "signature.h"
  24 SIGNATURE_CHECK (fabs, double, (double));
  25
  26 #include <string.h>
  27
  28 #include "macros.h"
  29 #include "minus-zero.h"
  30
  31 #define DOUBLE double
  32 #define L_(literal) literal
  33 #define MINUS_ZERO minus_zerod
  34 #define FABS fabs
  35 #define RANDOM randomd
  36 #include "test-fabs.h"
  37
  38 int
  39 main ()
  40 {
  41   /* A particular positive value.  */
  42   x = 0.6;
  43   y = fabs (x);
  44   ASSERT (y == 0.6);
  45
  46   /* A particular negative value.  */
  47   x = -0.6;
  48   y = fabs (x);
  49   ASSERT (y == 0.6);
  50
  51   test_function ();
  52
  53   return test_exit_status;
  54 }