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         int rc;
  43
  44         if (!(f = tmpfile()))
  45                 tap_bail_out("tmpfile failed: %s\n", strerror(errno));
  46
  47         if (fwrite(testdata, sizeof testdata-1, 1, f) != 1)
  48                 tap_bail_out("fwrite failed: %s\n", strerror(errno));
  49
  50         if (fflush(f) != 0)
  51                 tap_bail_out("fflush failed: %s\n", strerror(errno));
  52
  53         if (fseek(f, 0, SEEK_SET) != 0)
  54                 tap_bail_out("fseek failed: %s\n", strerror(errno));
  55
  56         /* First line: empty */
  57         rc = dx_getline(&line, &n, f);
  58         if (!tap_result(rc == DX_GETLINE_OK, "dx_getline")) {
  59                 tap_diag("Failed, unexpected result");
  60                 tap_diag("   Received: %d", rc);
  61                 tap_diag("   Expected: %d (DX_GETLINE_OK)", DX_GETLINE_OK);
  62         }
  63         if (!tap_result(n == 2, "alloc size")) {
  64                 tap_diag("Failed, unexpected result");
  65                 tap_diag("   Received: %lu", (unsigned long)n);
  66                 tap_diag("   Expected: 2");
  67         }
  68         if (!tap_result(line[0] == 0, "returned string")) {
  69                 tap_diag("Failed, unexpected result");
  70                 tap_diag("   Received: \"%.*s\"", (int)n, line);
  71                 tap_diag("   Expected: \"\"");
  72         }
  73
  74         /* Next line: long line (buffer needs expanding) */
  75         rc = dx_getline(&line, &n, f);
  76         if (!tap_result(rc == DX_GETLINE_OK, "dx_getline")) {
  77                 tap_diag("Failed, unexpected result");
  78                 tap_diag("   Received: %d", rc);
  79                 tap_diag("   Expected: %d (DX_GETLINE_OK)", DX_GETLINE_OK);
  80         }
  81         if (!tap_result(n > sizeof LONGLINE, "alloc size")) {
  82                 tap_diag("Failed, unexpected result");
  83                 tap_diag("   Received: %lu", (unsigned long)n);
  84                 tap_diag("   Expected: >%u", (unsigned)(sizeof LONGLINE));
  85         }
  86         if (!tap_result(!strcmp(line, LONGLINE), "returned string")) {
  87                 tap_diag("Failed, unexpected result");
  88                 tap_diag("   Received: \"%.*s\"", (int)n, line);
  89                 tap_diag("   Expected: \"" LONGLINE "\"");
  90         }
  91
  92         /* Next line: long line (buffer does not need expanding) */
  93         long_size = n;
  94         rc = dx_getline(&line, &n, f);
  95         if (!tap_result(rc == DX_GETLINE_OK, "dx_getline")) {
  96                 tap_diag("Failed, unexpected result");
  97                 tap_diag("   Received: %d", rc);
  98                 tap_diag("   Expected: %d (DX_GETLINE_OK)", DX_GETLINE_OK);
  99         }
 100         if (!tap_result(n == long_size, "alloc size")) {
 101                 tap_diag("Failed, unexpected result");
 102                 tap_diag("   Received: %lu", (unsigned long)n);
 103                 tap_diag("   Expected: %lu", (unsigned long)long_size);
 104         }
 105         if (!tap_result(!strcmp(line, LONGLINE), "returned string")) {
 106                 tap_diag("Failed, unexpected result");
 107                 tap_diag("   Received: \"%.*s\"", (int)n, line);
 108                 tap_diag("   Expected: \"" LONGLINE "\"");
 109         }
 110
 111         /* Next line: long line (new buffer allocation) */
 112         free(line); line = NULL; n = 0;
 113         rc = dx_getline(&line, &n, f);
 114         if (!tap_result(rc == DX_GETLINE_OK, "dx_getline")) {
 115                 tap_diag("Failed, unexpected result");
 116                 tap_diag("   Received: %d", rc);
 117                 tap_diag("   Expected: %d (DX_GETLINE_OK)", DX_GETLINE_OK);
 118         }
 119         if (!tap_result(n == long_size, "alloc size")) {
 120                 tap_diag("Failed, unexpected result");
 121                 tap_diag("   Received: %lu", (unsigned long)n);
 122                 tap_diag("   Expected: %lu", (unsigned long)long_size);
 123         }
 124         if (!tap_result(!strcmp(line, LONGLINE), "returned string")) {
 125                 tap_diag("Failed, unexpected result");
 126                 tap_diag("   Received: \"%.*s\"", (int)n, line);
 127                 tap_diag("   Expected: \"" LONGLINE "\"");
 128         }
 129
 130         /* Next line: short line */
 131         rc = dx_getline(&line, &n, f);
 132         if (!tap_result(rc == DX_GETLINE_OK, "dx_getline")) {
 133                 tap_diag("Failed, unexpected result");
 134                 tap_diag("   Received: %d", rc);
 135                 tap_diag("   Expected: %d (DX_GETLINE_OK)", DX_GETLINE_OK);
 136         }
 137         if (!tap_result(n == long_size, "alloc size")) {
 138                 tap_diag("Failed, unexpected result");
 139                 tap_diag("   Received: %lu", (unsigned long)n);
 140                 tap_diag("   Expected: %lu", (unsigned long)long_size);
 141         }
 142         if (!tap_result(!strcmp(line, "hellorld"), "returned string")) {
 143                 tap_diag("Failed, unexpected result");
 144                 tap_diag("   Received: \"%.*s\"", (int)n, line);
 145                 tap_diag("   Expected: \"hellorld\"");
 146         }
 147
 148         /* Next line: end of file */
 149         rc = dx_getline(&line, &n, f);
 150         if (!tap_result(rc == DX_GETLINE_EOF, "dx_getline (end of file)")) {
 151                 tap_diag("Failed, unexpected result");
 152                 tap_diag("   Received: %d", rc);
 153                 tap_diag("   Expected: %d (DX_GETLINE_EOF)", DX_GETLINE_EOF);
 154         }
 155         if (!tap_result(n == long_size, "alloc size")) {
 156                 tap_diag("Failed, unexpected result");
 157                 tap_diag("   Received: %lu", (unsigned long)n);
 158                 tap_diag("   Expected: %lu", (unsigned long)long_size);
 159         }
 160
 161         tap_done();
 162 }