]> git.scottworley.com Git - tl-append/blob - tl-append-test.c
ea42dc947fcf7fb94619fdacb74e029ed2d54398
[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 typedef struct expectation {
9 time_t a, b;
10 const char *message;
11 } ex_t;
12
13 const ex_t END = {((time_t)-1), ((time_t)-1), NULL};
14 static int is_end(ex_t exp) {
15 return exp.a == END.a && exp.b == END.b && exp.message == END.message;
16 }
17 static ex_t expectation(time_t a, time_t b, const char *message) {
18 ex_t exp;
19 exp.a = a;
20 exp.b = b;
21 exp.message = message;
22 return exp;
23 }
24
25 static void die(const char *message) {
26 fputs(message, stderr);
27 fputc('\n', stderr);
28 exit(1);
29 }
30
31 static void die_err(const char *message) {
32 perror(message);
33 exit(1);
34 }
35
36 static void remove_logfile() {
37 if (remove("tl.log") != 0) {
38 if (errno != ENOENT) {
39 die_err("Error removing log file");
40 }
41 }
42 }
43
44 static ex_t write_to_tl_append(const char *content) {
45 FILE *p = popen("./tl-append", "w");
46 if (p == NULL)
47 die_err("Couldn't run tl-append");
48 time_t start = time(NULL);
49 if (fputs(content, p) == EOF)
50 die("Couldn't write to pipe");
51 int status = pclose(p);
52 time_t end = time(NULL);
53 if (status < 0)
54 die_err("Error closing pipe");
55 if (status != 0)
56 die("tl-append exited abnormally");
57 return expectation(start, end, content);
58 }
59
60 static void verify_log_contents(ex_t exps[]) {
61
62 FILE *f = fopen("tl.log", "r");
63 if (f == NULL)
64 die_err("Error opening log file");
65 for (size_t i = 0; !is_end(exps[i]); i++) {
66 size_t len = strlen(exps[i].message);
67 char *buf = (char *)malloc(len + 2);
68 if (fgets(buf, len + 1, f) == NULL)
69 die("Error reading log file");
70 if (ferror(f))
71 die("Error reading log file");
72 if (strncmp(exps[i].message, buf, len + 1) != 0)
73 die("Wrong contents in log file");
74 free(buf);
75 }
76 if (fclose(f) != 0)
77 die_err("Error closing log file");
78 }
79
80 static void write_and_read_line() {
81 remove_logfile();
82 ex_t e = write_to_tl_append("foo\n");
83 verify_log_contents((ex_t[]){e, END});
84 }
85
86 static void write_and_read_two_lines() {
87 remove_logfile();
88 ex_t e1 = write_to_tl_append("foo\n");
89 ex_t e2 = write_to_tl_append("bar\n");
90 verify_log_contents((ex_t[]){e1, e2, END});
91 }
92
93 int main() {
94 write_and_read_line();
95 write_and_read_two_lines();
96 }