test/libapt/tagfile_test.cc

   1 #include <apt-pkg/fileutl.h>
   2 #include <apt-pkg/tagfile.h>
   3
   4 #include "assert.h"
   5 #include <stdlib.h>
   6 #include <string.h>
   7
   8 char *tempfile = NULL;
   9 int tempfile_fd = -1;
  10
  11 void remove_tmpfile(void)
  12 {
  13    if (tempfile_fd > 0)
  14       close(tempfile_fd);
  15    if (tempfile != NULL) {
  16       unlink(tempfile);
  17       free(tempfile);
  18    }
  19 }
  20
  21 int main(int argc, char *argv[])
  22 {
  23    FileFd fd;
  24    const char contents[] = "FieldA-12345678: the value of the field";
  25    atexit(remove_tmpfile);
  26    tempfile = strdup("apt-test.XXXXXXXX");
  27    tempfile_fd = mkstemp(tempfile);
  28
  29    /* (Re-)Open (as FileFd), write and seek to start of the temp file */
  30    equals(fd.OpenDescriptor(tempfile_fd, FileFd::ReadWrite), true);
  31    equals(fd.Write(contents, strlen(contents)), true);
  32    equals(fd.Seek(0), true);
  33
  34    pkgTagFile tfile(&fd);
  35    pkgTagSection section;
  36    equals(tfile.Step(section), true);
  37
  38    /* It has one field */
  39    equals(section.Count(), 1);
  40
  41    /* ... and it is called FieldA-12345678 */
  42    equals(section.Exists("FieldA-12345678"), true);
  43
  44    /* its value is correct */
  45    equals(section.FindS("FieldA-12345678"), std::string("the value of the field"));
  46    /* A non-existent field has an empty string as value */
  47    equals(section.FindS("FieldB-12345678"), std::string());
  48
  49    /* ... and Exists does not lie about missing fields... */
  50    equalsNot(section.Exists("FieldB-12345678"), true);
  51
  52    /* There is only one section in this tag file */
  53    equals(tfile.Step(section), false);
  54
  55    /* clean up handled by atexit handler, so just return here */
  56    return 0;
  57 }