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

   1 #define _POSIX_C_SOURCE 2
   2 #define _XOPEN_SOURCE
   3 #include <assert.h>
   4 #include <ctype.h>
   5 #include <errno.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <time.h>
  10
  11 #include "common.h"
  12
  13 const size_t TIMESTAMP_LEN = 19;
  14
  15 typedef struct expectation {
  16   time_t a, b;
  17   const char *message;
  18 } ex_t;
  19
  20 const ex_t END = {((time_t)-1), ((time_t)-1), NULL};
  21 static int is_end(ex_t exp) {
  22   return exp.a == END.a && exp.b == END.b && exp.message == END.message;
  23 }
  24 static ex_t expectation(time_t a, time_t b, const char *message) {
  25   ex_t exp;
  26   exp.a = a;
  27   exp.b = b;
  28   exp.message = message;
  29   return exp;
  30 }
  31
  32 static void remove_logfile() {
  33   if (remove(FILENAME) != 0) {
  34     if (errno != ENOENT) {
  35       die_err("Error removing log file");
  36     }
  37   }
  38 }
  39
  40 static ex_t write_to_tl_append(const char *content) {
  41   FILE *p = popen("./tl-append", "w");
  42   if (p == NULL)
  43     die_err("Couldn't run tl-append");
  44   time_t start = time(NULL);
  45   if (fputs(content, p) == EOF)
  46     die("Couldn't write to pipe");
  47   int status = pclose(p);
  48   time_t end = time(NULL);
  49   if (status < 0)
  50     die_err("Error closing pipe");
  51   if (status != 0)
  52     die("tl-append exited abnormally");
  53   return expectation(start, end, content);
  54 }
  55
  56 static void verify_timestamp(const ex_t *ex, const char *line) {
  57   struct tm tm;
  58
  59   /* localtime_r to set tm's timezone */
  60   time_t now_time = time(NULL);
  61   if (localtime_r(&now_time, &tm) == NULL)
  62     die_err("Can't unpack current time?");
  63
  64   const char *strptime_result = strptime(line, "%Y %m %d %H %M %S", &tm);
  65   if (strptime_result == NULL || strptime_result != &line[TIMESTAMP_LEN])
  66     die("Wrong contents in log file: Couldn't parse timestamp");
  67   time_t t = mktime(&tm);
  68   int t_in_range = ex->a <= t && t <= ex->b;
  69   if (!t_in_range)
  70     die("Wrong contents in log file: Wrong time");
  71 }
  72
  73 static void verify_line(const ex_t *ex, const char *line) {
  74   size_t line_len = strlen(line);
  75   if (line_len < TIMESTAMP_LEN + 1)
  76     die("Wrong contents in log file: Line too short");
  77   verify_timestamp(ex, line);
  78   if (line[TIMESTAMP_LEN] != ' ')
  79     die("Wrong contents in log file: Bad format");
  80   if (strncmp(ex->message, &line[TIMESTAMP_LEN + 1], strlen(ex->message) + 1) !=
  81       0)
  82     die("Wrong contents in log file");
  83 }
  84
  85 static void verify_log_contents(ex_t exps[]) {
  86
  87   FILE *f = fopen(FILENAME, "r");
  88   if (f == NULL)
  89     die_err("Error opening log file");
  90   for (size_t i = 0; !is_end(exps[i]); i++) {
  91     size_t len = TIMESTAMP_LEN + 1 + strlen(exps[i].message);
  92     char *buf = (char *)malloc(len + 2);
  93     if (fgets(buf, len + 1, f) == NULL)
  94       die("Error reading log file");
  95     if (ferror(f))
  96       die("Error reading log file");
  97     verify_line(&exps[i], buf);
  98     free(buf);
  99   }
 100   if (fclose(f) != 0)
 101     die_err("Error closing log file");
 102 }
 103
 104 static void test_encode_time() {
 105   /* localtime_r to set tm's timezone */
 106   time_t now_time = time(NULL);
 107   struct tm tm;
 108   if (localtime_r(&now_time, &tm) == NULL)
 109     die_err("Can't unpack current time?");
 110
 111   const char *strptime_result = strptime("2011-12-13 14:15:16", "%F %T", &tm);
 112   if (strptime_result == NULL || *strptime_result != '\0')
 113     die("Couldn't parse time?");
 114   time_t tt = mktime(&tm);
 115   if (tt == (time_t)-1)
 116     die_err("Can't pack time?");
 117
 118   const char *encoded = encode_time(tt);
 119   /* Loose check to allow for daylight savings time changes between the current
 120    * time and the target time.  :( */
 121   assert(encoded[0] == '2');
 122   assert(encoded[1] == '0');
 123   assert(encoded[2] == '1');
 124   assert(encoded[3] == '1');
 125   assert(encoded[4] == ' ');
 126   assert(encoded[5] == '1');
 127   assert(encoded[6] == '2');
 128   assert(encoded[7] == ' ');
 129   assert(encoded[8] == '1');
 130   assert(encoded[9] == '3');
 131   assert(encoded[10] == ' ');
 132   assert(encoded[11] == '1');
 133   assert(isdigit(encoded[12]));
 134   assert(encoded[13] == ' ');
 135   assert(isdigit(encoded[14]));
 136   assert(isdigit(encoded[15]));
 137   assert(encoded[16] == ' ');
 138   assert(encoded[17] == '1');
 139   assert(encoded[18] == '6');
 140   assert(encoded[19] == '\0');
 141 }
 142
 143 static void write_and_read_line() {
 144   remove_logfile();
 145   ex_t e = write_to_tl_append("foo\n");
 146   verify_log_contents((ex_t[]){e, END});
 147 }
 148
 149 static void write_and_read_two_lines() {
 150   remove_logfile();
 151   ex_t e1 = write_to_tl_append("foo\n");
 152   ex_t e2 = write_to_tl_append("bar\n");
 153   verify_log_contents((ex_t[]){e1, e2, END});
 154 }
 155
 156 int main() {
 157   test_encode_time();
 158   write_and_read_line();
 159   write_and_read_two_lines();
 160 }