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 <limits.h>
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <time.h>
  11
  12 #include "common.h"
  13
  14 const size_t TIMESTAMP_LEN = 19;
  15
  16 typedef struct expectation {
  17   time_t a, b;
  18   const char *message;
  19 } ex_t;
  20
  21 const ex_t END = {((time_t)-1), ((time_t)-1), NULL};
  22 static int is_end(ex_t exp) {
  23   return exp.a == END.a && exp.b == END.b && exp.message == END.message;
  24 }
  25 static ex_t expectation(time_t a, time_t b, const char *message) {
  26   ex_t exp;
  27   exp.a = a;
  28   exp.b = b;
  29   exp.message = message;
  30   return exp;
  31 }
  32
  33 static void remove_logfile() {
  34   if (remove(FILENAME) != 0) {
  35     if (errno != ENOENT) {
  36       die_err("Error removing log file");
  37     }
  38   }
  39 }
  40
  41 static ex_t write_to_tl_append(const char *content) {
  42   FILE *p = popen("./tl-append", "w");
  43   if (p == NULL)
  44     die_err("Couldn't run tl-append");
  45   time_t start = time(NULL);
  46   if (fputs(content, p) == EOF)
  47     die("Couldn't write to pipe");
  48   int status = pclose(p);
  49   time_t end = time(NULL);
  50   if (status < 0)
  51     die_err("Error closing pipe");
  52   if (status != 0)
  53     die("tl-append exited abnormally");
  54   return expectation(start, end, content);
  55 }
  56
  57 static void verify_timestamp(const ex_t *ex, const char *line) {
  58   struct tm tm;
  59
  60   /* localtime_r to set tm's timezone */
  61   time_t now_time = time(NULL);
  62   if (localtime_r(&now_time, &tm) == NULL)
  63     die_err("Can't unpack current time?");
  64
  65   const char *strptime_result = strptime(line, "%Y %m %d %H %M %S", &tm);
  66   if (strptime_result == NULL || strptime_result != &line[TIMESTAMP_LEN])
  67     die("Wrong contents in log file: Couldn't parse timestamp");
  68   time_t t = mktime(&tm);
  69   int t_in_range = ex->a <= t && t <= ex->b;
  70   if (!t_in_range)
  71     die("Wrong contents in log file: Wrong time");
  72 }
  73
  74 static void verify_line(const ex_t *ex, const char *line) {
  75   size_t line_len = strlen(line);
  76   if (line_len < TIMESTAMP_LEN + 1)
  77     die("Wrong contents in log file: Line too short");
  78   verify_timestamp(ex, line);
  79   if (line[TIMESTAMP_LEN] != ' ')
  80     die("Wrong contents in log file: Bad format");
  81   if (strncmp(ex->message, &line[TIMESTAMP_LEN + 1], strlen(ex->message) + 1) !=
  82       0)
  83     die("Wrong contents in log file");
  84 }
  85
  86 static void verify_log_contents(ex_t exps[]) {
  87
  88   FILE *f = fopen(FILENAME, "r");
  89   if (f == NULL)
  90     die_err("Error opening log file");
  91   for (size_t i = 0; !is_end(exps[i]); i++) {
  92     size_t len = TIMESTAMP_LEN + 1 + strlen(exps[i].message);
  93     if (len > INT_MAX - 1)
  94       die("message too long");
  95     char *buf = (char *)malloc(len + 2);
  96     if (fgets(buf, len + 1, f) == NULL)
  97       die("Error reading log file");
  98     if (ferror(f))
  99       die("Error reading log file");
 100     verify_line(&exps[i], buf);
 101     free(buf);
 102   }
 103   if (fclose(f) != 0)
 104     die_err("Error closing log file");
 105 }
 106
 107 static void test_encode_time() {
 108   /* localtime_r to set tm's timezone */
 109   time_t now_time = time(NULL);
 110   struct tm tm;
 111   if (localtime_r(&now_time, &tm) == NULL)
 112     die_err("Can't unpack current time?");
 113
 114   const char *strptime_result = strptime("2011-12-13 14:15:16", "%F %T", &tm);
 115   if (strptime_result == NULL || *strptime_result != '\0')
 116     die("Couldn't parse time?");
 117   time_t tt = mktime(&tm);
 118   if (tt == (time_t)-1)
 119     die_err("Can't pack time?");
 120
 121   const char *encoded = encode_time(tt);
 122   /* Loose check to allow for daylight savings time changes between the current
 123    * time and the target time.  :( */
 124   assert(encoded[0] == '2');
 125   assert(encoded[1] == '0');
 126   assert(encoded[2] == '1');
 127   assert(encoded[3] == '1');
 128   assert(encoded[4] == ' ');
 129   assert(encoded[5] == '1');
 130   assert(encoded[6] == '2');
 131   assert(encoded[7] == ' ');
 132   assert(encoded[8] == '1');
 133   assert(encoded[9] == '3');
 134   assert(encoded[10] == ' ');
 135   assert(encoded[11] == '1');
 136   assert(isdigit(encoded[12]));
 137   assert(encoded[13] == ' ');
 138   assert(isdigit(encoded[14]));
 139   assert(isdigit(encoded[15]));
 140   assert(encoded[16] == ' ');
 141   assert(encoded[17] == '1');
 142   assert(encoded[18] == '6');
 143   assert(encoded[19] == '\0');
 144 }
 145
 146 static void write_and_read_line() {
 147   remove_logfile();
 148   ex_t e = write_to_tl_append("foo\n");
 149   verify_log_contents((ex_t[]){e, END});
 150 }
 151
 152 static void write_and_read_two_lines() {
 153   remove_logfile();
 154   ex_t e1 = write_to_tl_append("foo\n");
 155   ex_t e2 = write_to_tl_append("bar\n");
 156   verify_log_contents((ex_t[]){e1, e2, END});
 157 }
 158
 159 int main() {
 160   test_encode_time();
 161   write_and_read_line();
 162   write_and_read_two_lines();
 163 }