t/getline.c

   1 /*
   2  * Copyright © 2024 Nick Bowler
   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
  18 void tap_diag(const char *fmt, ...);
  19
  20 #undef HAVE_GETLINE
  21 #define DX_GETLINE_INITIAL_ALLOC 2
  22 #include "getline.h"
  23 #include "tap.h"
  24
  25 #include <errno.h>
  26
  27 #define LONGLINE "this line is pretty long and may require scaling the buffer multiple times"
  28
  29 static const char testdata[] =
  30         "\n"
  31         LONGLINE "\n"
  32         LONGLINE "\n"
  33         LONGLINE "\n"
  34         "hellorld\n";
  35
  36 int main(void)
  37 {
  38         char *line = NULL;
  39         size_t long_size;
  40         size_t n = 0;
  41         FILE *f;
  42
  43         if (!(f = tmpfile()))
  44                 tap_bail_out("tmpfile failed: %s\n", strerror(errno));
  45
  46         if (fwrite(testdata, sizeof testdata-1, 1, f) != 1)
  47                 tap_bail_out("fwrite failed: %s\n", strerror(errno));
  48
  49         if (fflush(f) != 0)
  50                 tap_bail_out("fflush failed: %s\n", strerror(errno));
  51
  52         if (fseek(f, 0, SEEK_SET) != 0)
  53                 tap_bail_out("fseek failed: %s\n", strerror(errno));
  54
  55         /* First line: empty */
  56         tap_result(dx_getline(&line, &n, f) != 0, "dx_getline");
  57         if (!tap_result(n == 2, "alloc size")) {
  58                 tap_diag("Failed, unexpected result");
  59                 tap_diag("   Received: %lu", (unsigned long)n);
  60                 tap_diag("   Expected: 2");
  61         }
  62         if (!tap_result(line[0] == 0, "returned string")) {
  63                 tap_diag("Failed, unexpected result");
  64                 tap_diag("   Received: \"%.*s\"", (int)n, line);
  65                 tap_diag("   Expected: \"\"");
  66         }
  67
  68         /* Next line: long line (buffer needs expanding) */
  69         tap_result(dx_getline(&line, &n, f) != 0, "dx_getline");
  70         if (!tap_result(n > sizeof LONGLINE, "alloc size")) {
  71                 tap_diag("Failed, unexpected result");
  72                 tap_diag("   Received: %lu", (unsigned long)n);
  73                 tap_diag("   Expected: >%u", (unsigned)(sizeof LONGLINE));
  74         }
  75         if (!tap_result(!strcmp(line, LONGLINE), "returned string")) {
  76                 tap_diag("Failed, unexpected result");
  77                 tap_diag("   Received: \"%.*s\"", (int)n, line);
  78                 tap_diag("   Expected: \"" LONGLINE "\"");
  79         }
  80
  81         /* Next line: long line (buffer does not need expanding) */
  82         long_size = n;
  83         tap_result(dx_getline(&line, &n, f) != 0, "dx_getline");
  84         if (!tap_result(n == long_size, "alloc size")) {
  85                 tap_diag("Failed, unexpected result");
  86                 tap_diag("   Received: %lu", (unsigned long)n);
  87                 tap_diag("   Expected: %lu", (unsigned long)long_size);
  88         }
  89         if (!tap_result(!strcmp(line, LONGLINE), "returned string")) {
  90                 tap_diag("Failed, unexpected result");
  91                 tap_diag("   Received: \"%.*s\"", (int)n, line);
  92                 tap_diag("   Expected: \"" LONGLINE "\"");
  93         }
  94
  95         /* Next line: long line (new buffer allocation) */
  96         free(line); line = NULL; n = 0;
  97         tap_result(dx_getline(&line, &n, f) != 0, "dx_getline");
  98         if (!tap_result(n == long_size, "alloc size")) {
  99                 tap_diag("Failed, unexpected result");
 100                 tap_diag("   Received: %lu", (unsigned long)n);
 101                 tap_diag("   Expected: %lu", (unsigned long)long_size);
 102         }
 103         if (!tap_result(!strcmp(line, LONGLINE), "returned string")) {
 104                 tap_diag("Failed, unexpected result");
 105                 tap_diag("   Received: \"%.*s\"", (int)n, line);
 106                 tap_diag("   Expected: \"" LONGLINE "\"");
 107         }
 108
 109         /* Next line: short line */
 110         tap_result(dx_getline(&line, &n, f) != 0, "dx_getline");
 111         if (!tap_result(n == long_size, "alloc size")) {
 112                 tap_diag("Failed, unexpected result");
 113                 tap_diag("   Received: %lu", (unsigned long)n);
 114                 tap_diag("   Expected: %lu", (unsigned long)long_size);
 115         }
 116         if (!tap_result(!strcmp(line, "hellorld"), "returned string")) {
 117                 tap_diag("Failed, unexpected result");
 118                 tap_diag("   Received: \"%.*s\"", (int)n, line);
 119                 tap_diag("   Expected: \"hellorld\"");
 120         }
 121
 122         tap_done();
 123 }