tests/test-assert.c

   1 /* Test assert.h and static_assert.
   2    Copyright 2022-2025 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 Paul Eggert.  */
  18
  19 #include <config.h>
  20
  21 #define STATIC_ASSERT_TESTS \
  22   static_assert (2 + 2 == 4, "arithmetic does not work"); \
  23   static_assert (2 + 2 == 4); \
  24   static_assert (sizeof (char) == 1, "sizeof does not work"); \
  25   static_assert (sizeof (char) == 1)
  26
  27 STATIC_ASSERT_TESTS;
  28
  29 static char const *
  30 assert (char const *p, int i)
  31 {
  32   return p + i;
  33 }
  34
  35 static char const *
  36 f (char const *p)
  37 {
  38   return assert (p, 0);
  39 }
  40
  41 #include <assert.h>
  42
  43 STATIC_ASSERT_TESTS;
  44
  45 static int
  46 g (void)
  47 {
  48   assert (f ("this should work"));
  49   return 0;
  50 }
  51
  52 #define NDEBUG 1
  53 #include <assert.h>
  54
  55 STATIC_ASSERT_TESTS;
  56
  57 static int
  58 h (void)
  59 {
  60   assert (f ("this should work"));
  61   return 0;
  62 }
  63
  64 int
  65 main (void)
  66 {
  67   STATIC_ASSERT_TESTS;
  68   f ("");
  69   g ();
  70   h ();
  71   return 0;
  72 }