diff options
Diffstat (limited to 'tests/test-rollsum.c')
| -rw-r--r-- | tests/test-rollsum.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/tests/test-rollsum.c b/tests/test-rollsum.c new file mode 100644 index 00000000..97aeb0ae --- /dev/null +++ b/tests/test-rollsum.c @@ -0,0 +1,145 @@ +/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- + * + * Copyright (C) 2015 Red Hat, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#include "config.h" + +#include "libglnx.h" +#include "bsdiff/bsdiff.h" +#include "bsdiff/bspatch.h" +#include <glib.h> +#include <stdlib.h> +#include <gio/gio.h> +#include <string.h> +#include "ostree-rollsum.h" +#include "bupsplit.h" + +static void +test_rollsum_helper (const unsigned char *a, gsize size_a, const unsigned char *b, gsize size_b, gboolean expected_match) +{ + gsize i; + g_autoptr(GBytes) bytes_a = g_bytes_new_static (a, size_a); + g_autoptr(GBytes) bytes_b = g_bytes_new_static (b, size_b); + OstreeRollsumMatches *matches; + GPtrArray *matchlist; + guint64 sum_matched = 0; + + matches = _ostree_compute_rollsum_matches (bytes_a, bytes_b); + matchlist = matches->matches; + if (expected_match) + g_assert_cmpint (matchlist->len, >, 0); + else + g_assert_cmpint (matchlist->len, ==, 0); + + for (i = 0; i < matchlist->len; i++) + { + guint32 crc; + GVariant *match = matchlist->pdata[i]; + guint64 offset = 0, to_start = 0, from_start = 0; + g_variant_get (match, "(uttt)", &crc, &offset, &to_start, &from_start); + + g_assert_cmpint (offset, >=, 0); + g_assert_cmpint (from_start, <, size_a); + g_assert_cmpint (to_start, <, size_b); + + sum_matched += offset; + + g_assert_cmpint (memcmp (a + from_start, b + to_start, offset), ==, 0); + } + + g_assert_cmpint (sum_matched, ==, matches->match_size); + + _ostree_rollsum_matches_free (matches); +} + +static void +test_rollsum (void) +{ +#define MAX_BUFFER_SIZE 1000000 + gsize i; + int len; + unsigned char *a = malloc (MAX_BUFFER_SIZE); + unsigned char *b = malloc (MAX_BUFFER_SIZE); + g_autoptr(GRand) rand = g_rand_new (); + + /* These two buffers produce the same crc32. */ + const unsigned char conflicting_a[] = {0x35, 0x9b, 0x94, 0x5a, 0xa0, 0x5a, 0x34, 0xdc, 0x5c, 0x3, 0x46, 0xe, 0x34, 0x53, 0x85, 0x73, 0x64, 0xcc, 0x47, 0x10, 0x23, 0x8e, 0x7e, 0x6a, 0xca, 0xda, 0x7c, 0x12, 0x8a, 0x59, 0x7f, 0x7f, 0x4d, 0x1, 0xd8, 0xcc, 0x81, 0xcf, 0x2c, 0x7f, 0x10, 0xc2, 0xb4, 0x40, 0x1f, 0x2a, 0x0, 0x37, 0x85, 0xde, 0xfe, 0xa5, 0xc, 0x7c, 0xa1, 0x8, 0xd6, 0x75, 0xfd, 0x2, 0xcf, 0x2d, 0x53, 0x1b, 0x8a, 0x6b, 0x35, 0xad, 0xa, 0x8f, 0xad, 0x2d, 0x91, 0x87, 0x2b, 0x97, 0xcf, 0x1d, 0x7c, 0x61, 0xc4, 0xb2, 0x5e, 0xc3, 0xba, 0x5d, 0x2f, 0x3a, 0xeb, 0x41, 0x61, 0x4c, 0xa2, 0x34, 0xd, 0x43, 0xce, 0x10, 0xa3, 0x47, 0x4, 0xa0, 0x39, 0x77, 0xc2, 0xe8, 0x36, 0x1d, 0x87, 0xd1, 0x8f, 0x4d, 0x13, 0xa1, 0x34, 0xc3, 0x2c, 0xee, 0x1a, 0x10, 0x79, 0xb7, 0x97, 0x29, 0xe8, 0xf0, 0x5, 0xfc, 0xe6, 0x14, 0x87, 0x9c, 0x8f, 0x97, 0x23, 0xac, 0x1, 0xf2, 0xee, 0x69, 0xb2, 0xe5}; + + const unsigned char conflicting_b[] = {0xb2, 0x54, 0x81, 0x7d, 0x31, 0x83, 0xc7, 0xc, 0xcf, 0x7d, 0x90, 0x1c, 0x6b, 0xf6, 0x4e, 0xff, 0x49, 0xd1, 0xb6, 0xc, 0x9e, 0x85, 0xe3, 0x2d, 0xdb, 0x94, 0x8e, 0x1a, 0x17, 0x3f, 0x63, 0x59, 0xf9, 0x4b, 0x5f, 0x47, 0x97, 0x9c, 0x1c, 0xd7, 0x24, 0xd9, 0x42, 0x6, 0x1e, 0xf, 0x98, 0x10, 0xb4, 0xc, 0x50, 0xcb, 0xc5, 0x62, 0x53, 0x1, 0xd1, 0x5f, 0x16, 0x97, 0xaa, 0xd7, 0x57, 0x5e, 0xf2, 0xde, 0xae, 0x53, 0x58, 0x6, 0xb7, 0x9b, 0x8d, 0x2b, 0xd6, 0xb4, 0x55, 0x29, 0x3b, 0x27, 0x70, 0xd5, 0xf3, 0x8d, 0xdc, 0xad, 0x68, 0x63, 0xa5, 0x72, 0xce, 0x6b, 0x9, 0x2b, 0x60, 0x1b, 0x99, 0xd7, 0x86}; + + test_rollsum_helper (conflicting_a, sizeof conflicting_a, conflicting_b, sizeof conflicting_b, FALSE); + + for (i = 0; i < MAX_BUFFER_SIZE; i++) + { + a[i] = g_rand_int (rand); + b[i] = a[i]; + } + test_rollsum_helper (a, MAX_BUFFER_SIZE, b, MAX_BUFFER_SIZE, TRUE); + + /* Do not overwrite the first buffer. */ + len = bupsplit_find_ofs (b, MAX_BUFFER_SIZE, NULL); + if (len) + { + unsigned char *ptr = b + len; + gsize remaining = MAX_BUFFER_SIZE - len; + while (remaining) + { + len = bupsplit_find_ofs (ptr, remaining, NULL); + if (len == 0) + break; + *ptr = ~(*ptr); + remaining -= len; + ptr += len; + } + } + test_rollsum_helper (a, MAX_BUFFER_SIZE, b, MAX_BUFFER_SIZE, TRUE); + + /* Duplicate the first buffer. */ + len = bupsplit_find_ofs (b, MAX_BUFFER_SIZE, NULL); + if (len && len < MAX_BUFFER_SIZE / 2) + { + memcpy (b + len, b, len); + } + test_rollsum_helper (a, MAX_BUFFER_SIZE, b, MAX_BUFFER_SIZE, TRUE); + + /* All different. */ + for (i = 0; i < MAX_BUFFER_SIZE; i++) + { + a[i] = g_rand_int (rand); + b[i] = a[i] + 1; + } + test_rollsum_helper (a, MAX_BUFFER_SIZE, b, MAX_BUFFER_SIZE, FALSE); + + /* All different. */ + a[0] = g_rand_int (rand); + b[0] = a[0] + 1; + for (i = 1; i < MAX_BUFFER_SIZE; i++) + { + a[i] = g_rand_int (rand); + b[i] = g_rand_int (rand); + } + test_rollsum_helper (a, MAX_BUFFER_SIZE, b, MAX_BUFFER_SIZE, FALSE); +} + +int main (int argc, char **argv) +{ + g_test_init (&argc, &argv, NULL); + g_test_add_func ("/rollsum", test_rollsum); + return g_test_run(); +} |