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 
23 #include "got_error.h"
24 
25 #include "got_delta_priv.h"
26 #include "got_path_priv.h"
27 
28 #ifndef nitems
29 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
30 #endif
31 
32 struct delta_test {
33 	const char *base;
34 	const char *delta;
35 	size_t delta_len;
36 	const char *expected;
37 } delta_tests[] = {
38 	/* base len 0, target len 4, append 4 'x' */
39 	{ "", "\x00\x04\x04xxxx", 7, "xxxx" },
40 	/* copy 4 bytes at offset 0 from base, append 4 'x' */
41 	{ "aabbccdd", "\x08\x08\x90\x04\x04xxxx", 9, "aabbxxxx" },
42 	/* copy 4 bytes at offset 4 from base, append 4 'x' */
43 	{ "aabbccdd", "\x08\x08\x91\x04\x04\x04xxxx", 10, "ccddxxxx" },
44 };
45 
46 static int
47 delta_apply()
48 {
49 	const struct got_error *err = NULL;
50 	int i;
51 	FILE *result_file;
52 
53 	result_file = got_opentemp();
54 	if (result_file == NULL)
55 		return 1;
56 
57 	for (i = 0; i < nitems(delta_tests); i++) {
58 		struct delta_test *dt = &delta_tests[i];
59 		FILE *base_file;
60 		char buf[1024];
61 		size_t n, len, result_len;
62 
63 		len = strlen(dt->base);
64 		base_file = got_opentemp();
65 		if (base_file == NULL) {
66 			err = got_error_from_errno();
67 			break;
68 		}
69 
70 		n = fwrite(dt->base, 1, len, base_file);
71 		if (n != len) {
72 			err = got_ferror(base_file, GOT_ERR_IO);
73 			break;
74 		}
75 		rewind(base_file);
76 
77 		err = got_delta_apply(base_file, dt->delta, dt->delta_len,
78 		    result_file);
79 		fclose(base_file);
80 		if (err)
81 			break;
82 		result_len = strlen(dt->expected);
83 		n = fread(buf, result_len, 1, result_file);
84 		if (n != 1 || strncmp(buf, dt->expected, result_len) != 0) {
85 			err = got_ferror(result_file, GOT_ERR_BAD_DELTA);
86 			break;
87 		}
88 		rewind(result_file);
89 	}
90 
91 	fclose(result_file);
92 	return (err == NULL);
93 }
94 
95 #define RUN_TEST(expr, name) \
96 	{ test_ok = (expr);  \
97 	printf("test %s %s\n", (name), test_ok ? "ok" : "failed"); \
98 	failure = (failure || !test_ok); }
99 
100 int
101 main(int argc, const char *argv[])
102 {
103 	int test_ok;
104 	int failure = 0;
105 
106 	if (argc != 1) {
107 		fprintf(stderr, "usage: delta_test [REPO_PATH]\n");
108 		return 1;
109 	}
110 
111 	RUN_TEST(delta_apply(), "delta_apply");
112 
113 	return failure ? 1 : 0;
114 }