1 /*
2  * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <sys/queue.h>
18 
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <string.h>
22 #include <err.h>
23 #include <unistd.h>
24 
25 #include "got_error.h"
26 
27 #include "got_delta_lib.h"
28 #include "got_path_lib.h"
29 
30 #ifndef nitems
31 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
32 #endif
33 
34 struct delta_test {
35 	const char *base;
36 	const char *delta;
37 	size_t delta_len;
38 	const char *expected;
39 } delta_tests[] = {
40 	/* base len 0, target len 4, append 4 'x' */
41 	{ "", "\x00\x04\x04xxxx", 7, "xxxx" },
42 	/* copy 4 bytes at offset 0 from base, append 4 'x' */
43 	{ "aabbccdd", "\x08\x08\x90\x04\x04xxxx", 9, "aabbxxxx" },
44 	/* copy 4 bytes at offset 4 from base, append 4 'x' */
45 	{ "aabbccdd", "\x08\x08\x91\x04\x04\x04xxxx", 10, "ccddxxxx" },
46 };
47 
48 static int
49 delta_apply()
50 {
51 	const struct got_error *err = NULL;
52 	int i;
53 	FILE *result_file;
54 
55 	result_file = got_opentemp();
56 	if (result_file == NULL)
57 		return 1;
58 
59 	for (i = 0; i < nitems(delta_tests); i++) {
60 		struct delta_test *dt = &delta_tests[i];
61 		FILE *base_file;
62 		char buf[1024];
63 		size_t n, len, result_len;
64 
65 		len = strlen(dt->base);
66 		base_file = got_opentemp();
67 		if (base_file == NULL) {
68 			err = got_error_from_errno();
69 			break;
70 		}
71 
72 		n = fwrite(dt->base, 1, len, base_file);
73 		if (n != len) {
74 			err = got_ferror(base_file, GOT_ERR_IO);
75 			break;
76 		}
77 		rewind(base_file);
78 
79 		err = got_delta_apply(base_file, dt->delta, dt->delta_len,
80 		    result_file);
81 		fclose(base_file);
82 		if (err)
83 			break;
84 		result_len = strlen(dt->expected);
85 		n = fread(buf, result_len, 1, result_file);
86 		if (n != 1 || strncmp(buf, dt->expected, result_len) != 0) {
87 			err = got_ferror(result_file, GOT_ERR_BAD_DELTA);
88 			break;
89 		}
90 		rewind(result_file);
91 	}
92 
93 	fclose(result_file);
94 	return (err == NULL);
95 }
96 
97 #define RUN_TEST(expr, name) \
98 	{ test_ok = (expr);  \
99 	printf("test %s %s\n", (name), test_ok ? "ok" : "failed"); \
100 	failure = (failure || !test_ok); }
101 
102 int
103 main(int argc, const char *argv[])
104 {
105 	int test_ok;
106 	int failure = 0;
107 
108 	if (argc != 1) {
109 		fprintf(stderr, "usage: delta_test [REPO_PATH]\n");
110 		return 1;
111 	}
112 
113 	if (pledge("stdio rpath wpath cpath", NULL) == -1)
114 		err(1, "pledge");
115 
116 	RUN_TEST(delta_apply(), "delta_apply");
117 
118 	return failure ? 1 : 0;
119 }