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appease clang-tidy: Don't do unnecessary size_t→int narrowing conversion
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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
14const size_t TIMESTAMP_LEN = 19;
15
16typedef struct expectation {
17 time_t a, b;
18 const char *message;
19} ex_t;
20
21const ex_t END = {((time_t)-1), ((time_t)-1), NULL};
22static int is_end(ex_t exp) {
23 return exp.a == END.a && exp.b == END.b && exp.message == END.message;
24}
25static 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
33static void remove_logfile() {
34 if (remove(FILENAME) != 0) {
35 if (errno != ENOENT) {
36 die_err("Error removing log file");
37 }
38 }
39}
40
41static 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
57static 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
74static 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
86static 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
107static 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
146static 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
152static 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
159int main() {
160 test_encode_time();
161 write_and_read_line();
162 write_and_read_two_lines();
163}