git.scottworley.com Git - tl-append/blob - tl-append-test.c

   1 #define _POSIX_C_SOURCE 2
   2 #include <errno.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <time.h>
   7
   8 #include "common.h"
   9
  10 typedef struct expectation {
  11   time_t a, b;
  12   const char *message;
  13 } ex_t;
  14
  15 const ex_t END = {((time_t)-1), ((time_t)-1), NULL};
  16 static int is_end(ex_t exp) {
  17   return exp.a == END.a && exp.b == END.b && exp.message == END.message;
  18 }
  19 static ex_t expectation(time_t a, time_t b, const char *message) {
  20   ex_t exp;
  21   exp.a = a;
  22   exp.b = b;
  23   exp.message = message;
  24   return exp;
  25 }
  26
  27 static void remove_logfile() {
  28   if (remove(FILENAME) != 0) {
  29     if (errno != ENOENT) {
  30       die_err("Error removing log file");
  31     }
  32   }
  33 }
  34
  35 static ex_t write_to_tl_append(const char *content) {
  36   FILE *p = popen("./tl-append", "w");
  37   if (p == NULL)
  38     die_err("Couldn't run tl-append");
  39   time_t start = time(NULL);
  40   if (fputs(content, p) == EOF)
  41     die("Couldn't write to pipe");
  42   int status = pclose(p);
  43   time_t end = time(NULL);
  44   if (status < 0)
  45     die_err("Error closing pipe");
  46   if (status != 0)
  47     die("tl-append exited abnormally");
  48   return expectation(start, end, content);
  49 }
  50
  51 static void verify_log_contents(ex_t exps[]) {
  52
  53   FILE *f = fopen(FILENAME, "r");
  54   if (f == NULL)
  55     die_err("Error opening log file");
  56   for (size_t i = 0; !is_end(exps[i]); i++) {
  57     size_t len = strlen(exps[i].message);
  58     char *buf = (char *)malloc(len + 2);
  59     if (fgets(buf, len + 1, f) == NULL)
  60       die("Error reading log file");
  61     if (ferror(f))
  62       die("Error reading log file");
  63     if (strncmp(exps[i].message, buf, len + 1) != 0)
  64       die("Wrong contents in log file");
  65     free(buf);
  66   }
  67   if (fclose(f) != 0)
  68     die_err("Error closing log file");
  69 }
  70
  71 static void write_and_read_line() {
  72   remove_logfile();
  73   ex_t e = write_to_tl_append("foo\n");
  74   verify_log_contents((ex_t[]){e, END});
  75 }
  76
  77 static void write_and_read_two_lines() {
  78   remove_logfile();
  79   ex_t e1 = write_to_tl_append("foo\n");
  80   ex_t e2 = write_to_tl_append("bar\n");
  81   verify_log_contents((ex_t[]){e1, e2, END});
  82 }
  83
  84 int main() {
  85   write_and_read_line();
  86   write_and_read_two_lines();
  87 }