tests/printf_unit_test.c

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2011 Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <stdio.h>
  20 #include <string.h>
  21 #include <grub/test.h>
  22 #include <grub/misc.h>
  23
  24 #define MSG "printf test failed: %s, %s", real, expected
  25
  26 #if defined(__GNUC__) && __GNUC__ >= 7
  27 #pragma GCC diagnostic ignored "-Wformat-truncation="
  28 #endif
  29
  30 static void
  31 printf_test (void)
  32 {
  33   char real[512];
  34   char expected[512];
  35   char *null = NULL;
  36
  37   grub_snprintf (real, sizeof (real), "%s", null);
  38   snprintf (expected, sizeof (expected), "%s", null);
  39   grub_test_assert (strcmp (real, expected) == 0, MSG);
  40
  41   grub_snprintf (real, sizeof (real), "%10s", null);
  42   snprintf (expected, sizeof (expected), "%10s", null);
  43   grub_test_assert (strcmp (real, expected) == 0, MSG);
  44
  45   grub_snprintf (real, sizeof (real), "%-10s", null);
  46   snprintf (expected, sizeof (expected), "%-10s", null);
  47   grub_test_assert (strcmp (real, expected) == 0, MSG);
  48
  49   grub_snprintf (real, sizeof (real), "%d%%", 10);
  50   snprintf (expected, sizeof (expected), "%d%%", 10);
  51   grub_test_assert (strcmp (real, expected) == 0, MSG);
  52
  53   grub_snprintf (real, sizeof (real), "%d %%", 10);
  54   snprintf (expected, sizeof (expected), "%d %%", 10);
  55   grub_test_assert (strcmp (real, expected) == 0, MSG);
  56
  57   grub_snprintf (real, sizeof (real), "%%");
  58   snprintf (expected, sizeof (expected), "%%");
  59   grub_test_assert (strcmp (real, expected) == 0, MSG);
  60
  61   grub_snprintf (real, sizeof (real), "%d %d %d", 1, 2, 3);
  62   snprintf (expected, sizeof (expected), "%d %d %d", 1, 2, 3);
  63   grub_test_assert (strcmp (real, expected) == 0, MSG);
  64   grub_snprintf (real, sizeof (real), "%3$d %2$d %1$d", 1, 2, 3);
  65   snprintf (expected, sizeof (expected), "%3$d %2$d %1$d", 1, 2, 3);
  66   grub_test_assert (strcmp (real, expected) == 0, MSG);
  67   grub_snprintf (real, sizeof (real), "%d %lld %d", 1, 2LL, 3);
  68   snprintf (expected, sizeof (expected), "%d %lld %d", 1, 2LL, 3);
  69   grub_test_assert (strcmp (real, expected) == 0, MSG);
  70   grub_snprintf (real, sizeof (real), "%3$d %2$lld %1$d", 1, 2LL, 3);
  71   snprintf (expected, sizeof (expected), "%3$d %2$lld %1$d", 1, 2LL, 3);
  72   grub_test_assert (strcmp (real, expected) == 0, MSG);
  73   grub_snprintf (real, sizeof (real), "%%0%dd ", 1);
  74   snprintf (expected, sizeof (expected), "%%0%dd ", 1);
  75   grub_test_assert (strcmp (real, expected) == 0, MSG);
  76 }
  77
  78 GRUB_UNIT_TEST ("printf_unit_test", printf_test);