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[tl-append] / 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 }