tests/object/tree/write.c

   1 #include "clar_libgit2.h"
   2
   3 #include "tree.h"
   4
   5 static const char *blob_oid = "fa49b077972391ad58037050f2a75f74e3671e92";
   6 static const char *first_tree  = "181037049a54a1eb5fab404658a3a250b44335d7";
   7 static const char *second_tree = "f60079018b664e4e79329a7ef9559c8d9e0378d1";
   8 static const char *third_tree = "eb86d8b81d6adbd5290a935d6c9976882de98488";
   9
  10 static git_repository *g_repo;
  11
  12 /* Fixture setup and teardown */
  13 void test_object_tree_write__initialize(void)
  14 {
  15    g_repo = cl_git_sandbox_init("testrepo");
  16 }
  17
  18 void test_object_tree_write__cleanup(void)
  19 {
  20    cl_git_sandbox_cleanup();
  21
  22         cl_git_pass(git_libgit2_opts(GIT_OPT_ENABLE_STRICT_OBJECT_CREATION, 1));
  23 }
  24
  25 void test_object_tree_write__from_memory(void)
  26 {
  27         /* write a tree from a memory */
  28         git_treebuilder *builder;
  29         git_tree *tree;
  30         git_oid id, bid, rid, id2;
  31
  32         git_oid_fromstr(&id, first_tree);
  33         git_oid_fromstr(&id2, second_tree);
  34         git_oid_fromstr(&bid, blob_oid);
  35
  36         /* create a second tree from first tree using `git_treebuilder_insert`
  37          * on REPOSITORY_FOLDER.
  38          */
  39         cl_git_pass(git_tree_lookup(&tree, g_repo, &id));
  40         cl_git_pass(git_treebuilder_new(&builder, g_repo, tree));
  41
  42         cl_git_fail(git_treebuilder_insert(NULL, builder, "",
  43                 &bid, GIT_FILEMODE_BLOB));
  44         cl_git_fail(git_treebuilder_insert(NULL, builder, "/",
  45                 &bid, GIT_FILEMODE_BLOB));
  46         cl_git_fail(git_treebuilder_insert(NULL, builder, ".git",
  47                 &bid, GIT_FILEMODE_BLOB));
  48         cl_git_fail(git_treebuilder_insert(NULL, builder, "..",
  49                 &bid, GIT_FILEMODE_BLOB));
  50         cl_git_fail(git_treebuilder_insert(NULL, builder, ".",
  51                 &bid, GIT_FILEMODE_BLOB));
  52         cl_git_fail(git_treebuilder_insert(NULL, builder, "folder/new.txt",
  53                 &bid, GIT_FILEMODE_BLOB));
  54
  55         cl_git_pass(git_treebuilder_insert(
  56                 NULL, builder, "new.txt", &bid, GIT_FILEMODE_BLOB));
  57
  58         cl_git_pass(git_treebuilder_write(&rid, builder));
  59
  60         cl_assert(git_oid_cmp(&rid, &id2) == 0);
  61
  62         git_treebuilder_free(builder);
  63         git_tree_free(tree);
  64 }
  65
  66 void test_object_tree_write__subtree(void)
  67 {
  68         /* write a hierarchical tree from a memory */
  69         git_treebuilder *builder;
  70         git_tree *tree;
  71         git_oid id, bid, subtree_id, id2, id3;
  72         git_oid id_hiearar;
  73
  74         git_oid_fromstr(&id, first_tree);
  75         git_oid_fromstr(&id2, second_tree);
  76         git_oid_fromstr(&id3, third_tree);
  77         git_oid_fromstr(&bid, blob_oid);
  78
  79         /* create subtree */
  80         cl_git_pass(git_treebuilder_new(&builder, g_repo, NULL));
  81         cl_git_pass(git_treebuilder_insert(
  82                 NULL, builder, "new.txt", &bid, GIT_FILEMODE_BLOB)); /* -V536 */
  83         cl_git_pass(git_treebuilder_write(&subtree_id, builder));
  84         git_treebuilder_free(builder);
  85
  86         /* create parent tree */
  87         cl_git_pass(git_tree_lookup(&tree, g_repo, &id));
  88         cl_git_pass(git_treebuilder_new(&builder, g_repo, tree));
  89         cl_git_pass(git_treebuilder_insert(
  90                 NULL, builder, "new", &subtree_id, GIT_FILEMODE_TREE)); /* -V536 */
  91         cl_git_pass(git_treebuilder_write(&id_hiearar, builder));
  92         git_treebuilder_free(builder);
  93         git_tree_free(tree);
  94
  95         cl_assert(git_oid_cmp(&id_hiearar, &id3) == 0);
  96
  97         /* check data is correct */
  98         cl_git_pass(git_tree_lookup(&tree, g_repo, &id_hiearar));
  99         cl_assert(2 == git_tree_entrycount(tree));
 100         git_tree_free(tree);
 101 }
 102
 103 /*
 104  * And the Lord said: Is this tree properly sorted?
 105  */
 106 void test_object_tree_write__sorted_subtrees(void)
 107 {
 108         git_treebuilder *builder;
 109         git_tree *tree;
 110         unsigned int i;
 111         int position_c = -1, position_cake = -1, position_config = -1;
 112
 113         struct {
 114                 unsigned int attr;
 115                 const char *filename;
 116         } entries[] = {
 117                 { GIT_FILEMODE_BLOB, ".gitattributes" },
 118                 { GIT_FILEMODE_BLOB, ".gitignore" },
 119                 { GIT_FILEMODE_BLOB, ".htaccess" },
 120                 { GIT_FILEMODE_BLOB, "Capfile" },
 121                 { GIT_FILEMODE_BLOB, "Makefile"},
 122                 { GIT_FILEMODE_BLOB, "README"},
 123                 { GIT_FILEMODE_TREE, "app"},
 124                 { GIT_FILEMODE_TREE, "cake"},
 125                 { GIT_FILEMODE_TREE, "config"},
 126                 { GIT_FILEMODE_BLOB, "c"},
 127                 { GIT_FILEMODE_BLOB, "git_test.txt"},
 128                 { GIT_FILEMODE_BLOB, "htaccess.htaccess"},
 129                 { GIT_FILEMODE_BLOB, "index.php"},
 130                 { GIT_FILEMODE_TREE, "plugins"},
 131                 { GIT_FILEMODE_TREE, "schemas"},
 132                 { GIT_FILEMODE_TREE, "ssl-certs"},
 133                 { GIT_FILEMODE_TREE, "vendors"}
 134         };
 135
 136         git_oid bid, tid, tree_oid;
 137
 138         cl_git_pass(git_oid_fromstr(&bid, blob_oid));
 139         cl_git_pass(git_oid_fromstr(&tid, first_tree));
 140
 141         cl_git_pass(git_treebuilder_new(&builder, g_repo, NULL));
 142
 143         for (i = 0; i < ARRAY_SIZE(entries); ++i) {
 144                 git_oid *id = entries[i].attr == GIT_FILEMODE_TREE ?  &tid : &bid;
 145
 146                 cl_git_pass(git_treebuilder_insert(NULL,
 147                         builder, entries[i].filename, id, entries[i].attr));
 148         }
 149
 150         cl_git_pass(git_treebuilder_write(&tree_oid, builder));
 151
 152         cl_git_pass(git_tree_lookup(&tree, g_repo, &tree_oid));
 153         for (i = 0; i < git_tree_entrycount(tree); i++) {
 154                 const git_tree_entry *entry = git_tree_entry_byindex(tree, i);
 155
 156                 if (strcmp(entry->filename, "c") == 0)
 157                         position_c = i;
 158
 159                 if (strcmp(entry->filename, "cake") == 0)
 160                         position_cake = i;
 161
 162                 if (strcmp(entry->filename, "config") == 0)
 163                         position_config = i;
 164         }
 165
 166         git_tree_free(tree);
 167
 168         cl_assert(position_c != -1);
 169         cl_assert(position_cake != -1);
 170         cl_assert(position_config != -1);
 171
 172         cl_assert(position_c < position_cake);
 173         cl_assert(position_cake < position_config);
 174
 175         git_treebuilder_free(builder);
 176 }
 177
 178 static struct {
 179         unsigned int attr;
 180         const char *filename;
 181 } _entries[] = {
 182         { GIT_FILEMODE_BLOB, "aardvark" },
 183         { GIT_FILEMODE_BLOB, ".first" },
 184         { GIT_FILEMODE_BLOB, "apple" },
 185         { GIT_FILEMODE_BLOB, "last"},
 186         { GIT_FILEMODE_BLOB, "apple_after"},
 187         { GIT_FILEMODE_BLOB, "after_aardvark"},
 188         { 0, NULL },
 189 };
 190
 191 void test_object_tree_write__removing_and_re_adding_in_treebuilder(void)
 192 {
 193         git_treebuilder *builder;
 194         int i, aardvark_i, apple_i, apple_after_i, apple_extra_i, last_i;
 195         git_oid entry_oid, tree_oid;
 196         git_tree *tree;
 197
 198         cl_git_pass(git_oid_fromstr(&entry_oid, blob_oid));
 199
 200         cl_git_pass(git_treebuilder_new(&builder, g_repo, NULL));
 201
 202         cl_assert_equal_i(0, (int)git_treebuilder_entrycount(builder));
 203
 204         for (i = 0; _entries[i].filename; ++i)
 205                 cl_git_pass(git_treebuilder_insert(NULL,
 206                         builder, _entries[i].filename, &entry_oid, _entries[i].attr));
 207
 208         cl_assert_equal_i(6, (int)git_treebuilder_entrycount(builder));
 209
 210         cl_git_pass(git_treebuilder_remove(builder, "apple"));
 211         cl_assert_equal_i(5, (int)git_treebuilder_entrycount(builder));
 212
 213         cl_git_pass(git_treebuilder_remove(builder, "apple_after"));
 214         cl_assert_equal_i(4, (int)git_treebuilder_entrycount(builder));
 215
 216         cl_git_pass(git_treebuilder_insert(
 217                 NULL, builder, "before_last", &entry_oid, GIT_FILEMODE_BLOB));
 218         cl_assert_equal_i(5, (int)git_treebuilder_entrycount(builder));
 219
 220         /* reinsert apple_after */
 221         cl_git_pass(git_treebuilder_insert(
 222                 NULL, builder, "apple_after", &entry_oid, GIT_FILEMODE_BLOB));
 223         cl_assert_equal_i(6, (int)git_treebuilder_entrycount(builder));
 224
 225         cl_git_pass(git_treebuilder_remove(builder, "last"));
 226         cl_assert_equal_i(5, (int)git_treebuilder_entrycount(builder));
 227
 228         /* reinsert last */
 229         cl_git_pass(git_treebuilder_insert(
 230                 NULL, builder, "last", &entry_oid, GIT_FILEMODE_BLOB));
 231         cl_assert_equal_i(6, (int)git_treebuilder_entrycount(builder));
 232
 233         cl_git_pass(git_treebuilder_insert(
 234                 NULL, builder, "apple_extra", &entry_oid, GIT_FILEMODE_BLOB));
 235         cl_assert_equal_i(7, (int)git_treebuilder_entrycount(builder));
 236
 237         cl_git_pass(git_treebuilder_write(&tree_oid, builder));
 238
 239         git_treebuilder_free(builder);
 240
 241         cl_git_pass(git_tree_lookup(&tree, g_repo, &tree_oid));
 242
 243         cl_assert_equal_i(7, (int)git_tree_entrycount(tree));
 244
 245         cl_assert(git_tree_entry_byname(tree, ".first") != NULL);
 246         cl_assert(git_tree_entry_byname(tree, "apple") == NULL);
 247         cl_assert(git_tree_entry_byname(tree, "apple_after") != NULL);
 248         cl_assert(git_tree_entry_byname(tree, "apple_extra") != NULL);
 249         cl_assert(git_tree_entry_byname(tree, "last") != NULL);
 250
 251         aardvark_i = apple_i = apple_after_i = apple_extra_i = last_i = -1;
 252
 253         for (i = 0; i < 7; ++i) {
 254                 const git_tree_entry *entry = git_tree_entry_byindex(tree, i);
 255
 256                 if (!strcmp(entry->filename, "aardvark"))
 257                         aardvark_i = i;
 258                 else if (!strcmp(entry->filename, "apple"))
 259                         apple_i = i;
 260                 else if (!strcmp(entry->filename, "apple_after"))
 261                         apple_after_i = i;
 262                 else if (!strcmp(entry->filename, "apple_extra"))
 263                         apple_extra_i = i;
 264                 else if (!strcmp(entry->filename, "last"))
 265                         last_i = i;
 266         }
 267
 268         cl_assert_equal_i(-1, apple_i);
 269         cl_assert_equal_i(6, last_i);
 270         cl_assert(aardvark_i < apple_after_i);
 271         cl_assert(apple_after_i < apple_extra_i);
 272
 273         git_tree_free(tree);
 274 }
 275
 276 static int treebuilder_filter_prefixed(
 277         const git_tree_entry *entry, void *payload)
 278 {
 279         return !git__prefixcmp(git_tree_entry_name(entry), payload);
 280 }
 281
 282 void test_object_tree_write__filtering(void)
 283 {
 284         git_treebuilder *builder;
 285         int i;
 286         git_oid entry_oid, tree_oid;
 287         git_tree *tree;
 288
 289         git_oid_fromstr(&entry_oid, blob_oid);
 290
 291         cl_git_pass(git_treebuilder_new(&builder, g_repo, NULL));
 292
 293         for (i = 0; _entries[i].filename; ++i)
 294                 cl_git_pass(git_treebuilder_insert(NULL,
 295                         builder, _entries[i].filename, &entry_oid, _entries[i].attr));
 296
 297         cl_assert_equal_i(6, (int)git_treebuilder_entrycount(builder));
 298
 299         cl_assert(git_treebuilder_get(builder, "apple") != NULL);
 300         cl_assert(git_treebuilder_get(builder, "aardvark") != NULL);
 301         cl_assert(git_treebuilder_get(builder, "last") != NULL);
 302
 303         git_treebuilder_filter(builder, treebuilder_filter_prefixed, "apple");
 304
 305         cl_assert_equal_i(4, (int)git_treebuilder_entrycount(builder));
 306
 307         cl_assert(git_treebuilder_get(builder, "apple") == NULL);
 308         cl_assert(git_treebuilder_get(builder, "aardvark") != NULL);
 309         cl_assert(git_treebuilder_get(builder, "last") != NULL);
 310
 311         git_treebuilder_filter(builder, treebuilder_filter_prefixed, "a");
 312
 313         cl_assert_equal_i(2, (int)git_treebuilder_entrycount(builder));
 314
 315         cl_assert(git_treebuilder_get(builder, "aardvark") == NULL);
 316         cl_assert(git_treebuilder_get(builder, "last") != NULL);
 317
 318         cl_git_pass(git_treebuilder_write(&tree_oid, builder));
 319
 320         git_treebuilder_free(builder);
 321
 322         cl_git_pass(git_tree_lookup(&tree, g_repo, &tree_oid));
 323
 324         cl_assert_equal_i(2, (int)git_tree_entrycount(tree));
 325
 326         git_tree_free(tree);
 327 }
 328
 329 void test_object_tree_write__cruel_paths(void)
 330 {
 331         static const char *the_paths[] = {
 332                 "C:\\",
 333                 " : * ? \" \n < > |",
 334                 "a\\b",
 335                 "\\\\b\a",
 336                 ":\\",
 337                 "COM1",
 338                 "foo.aux",
 339                 REP1024("1234"), /* 4096 char string */
 340                 REP1024("12345678"), /* 8192 char string */
 341                 "\xC5\xAA\x6E\xC4\xAD\x63\xC5\x8D\x64\x65\xCC\xBD", /* Ūnĭcōde̽ */
 342                 NULL
 343         };
 344         git_treebuilder *builder;
 345         git_tree *tree;
 346         git_oid id, bid, subid;
 347         const char **scan;
 348         int count = 0, i, j;
 349         git_tree_entry *te;
 350
 351         git_oid_fromstr(&bid, blob_oid);
 352
 353         /* create tree */
 354         cl_git_pass(git_treebuilder_new(&builder, g_repo, NULL));
 355         for (scan = the_paths; *scan; ++scan) {
 356                 cl_git_pass(git_treebuilder_insert(
 357                         NULL, builder, *scan, &bid, GIT_FILEMODE_BLOB));
 358                 count++;
 359         }
 360         cl_git_pass(git_treebuilder_write(&id, builder));
 361         git_treebuilder_free(builder);
 362
 363         /* check data is correct */
 364         cl_git_pass(git_tree_lookup(&tree, g_repo, &id));
 365
 366         cl_assert_equal_i(count, git_tree_entrycount(tree));
 367
 368         for (scan = the_paths; *scan; ++scan) {
 369                 const git_tree_entry *cte = git_tree_entry_byname(tree, *scan);
 370                 cl_assert(cte != NULL);
 371                 cl_assert_equal_s(*scan, git_tree_entry_name(cte));
 372         }
 373         for (scan = the_paths; *scan; ++scan) {
 374                 cl_git_pass(git_tree_entry_bypath(&te, tree, *scan));
 375                 cl_assert_equal_s(*scan, git_tree_entry_name(te));
 376                 git_tree_entry_free(te);
 377         }
 378
 379         git_tree_free(tree);
 380
 381         /* let's try longer paths */
 382         cl_git_pass(git_treebuilder_new(&builder, g_repo, NULL));
 383         for (scan = the_paths; *scan; ++scan) {
 384                 cl_git_pass(git_treebuilder_insert(
 385                         NULL, builder, *scan, &id, GIT_FILEMODE_TREE));
 386         }
 387         cl_git_pass(git_treebuilder_write(&subid, builder));
 388         git_treebuilder_free(builder);
 389
 390         /* check data is correct */
 391         cl_git_pass(git_tree_lookup(&tree, g_repo, &subid));
 392
 393         cl_assert_equal_i(count, git_tree_entrycount(tree));
 394
 395         for (i = 0; i < count; ++i) {
 396                 for (j = 0; j < count; ++j) {
 397                         git_buf b = GIT_BUF_INIT;
 398                         cl_git_pass(git_buf_joinpath(&b, the_paths[i], the_paths[j]));
 399                         cl_git_pass(git_tree_entry_bypath(&te, tree, b.ptr));
 400                         cl_assert_equal_s(the_paths[j], git_tree_entry_name(te));
 401                         git_tree_entry_free(te);
 402                         git_buf_dispose(&b);
 403                 }
 404         }
 405
 406         git_tree_free(tree);
 407 }
 408
 409 void test_object_tree_write__protect_filesystems(void)
 410 {
 411         git_treebuilder *builder;
 412         git_oid bid;
 413
 414         cl_git_pass(git_oid_fromstr(&bid, "fa49b077972391ad58037050f2a75f74e3671e92"));
 415
 416         /* Ensure that (by default) we can write objects with funny names on
 417          * platforms that are not affected.
 418          */
 419         cl_git_pass(git_treebuilder_new(&builder, g_repo, NULL));
 420
 421         cl_git_fail(git_treebuilder_insert(NULL, builder, ".git.", &bid, GIT_FILEMODE_BLOB));
 422         cl_git_fail(git_treebuilder_insert(NULL, builder, "git~1", &bid, GIT_FILEMODE_BLOB));
 423
 424 #ifndef __APPLE__
 425         cl_git_pass(git_treebuilder_insert(NULL, builder, ".git\xef\xbb\xbf", &bid, GIT_FILEMODE_BLOB));
 426         cl_git_pass(git_treebuilder_insert(NULL, builder, ".git\xe2\x80\xad", &bid, GIT_FILEMODE_BLOB));
 427 #endif
 428
 429         git_treebuilder_free(builder);
 430
 431         /* Now turn on core.protectHFS and core.protectNTFS and validate that these
 432          * paths are rejected.
 433          */
 434
 435         cl_repo_set_bool(g_repo, "core.protectHFS", true);
 436         cl_repo_set_bool(g_repo, "core.protectNTFS", true);
 437
 438         cl_git_pass(git_treebuilder_new(&builder, g_repo, NULL));
 439
 440         cl_git_fail(git_treebuilder_insert(NULL, builder, ".git.", &bid, GIT_FILEMODE_BLOB));
 441         cl_git_fail(git_treebuilder_insert(NULL, builder, "git~1", &bid, GIT_FILEMODE_BLOB));
 442
 443         cl_git_fail(git_treebuilder_insert(NULL, builder, ".git\xef\xbb\xbf", &bid, GIT_FILEMODE_BLOB));
 444         cl_git_fail(git_treebuilder_insert(NULL, builder, ".git\xe2\x80\xad", &bid, GIT_FILEMODE_BLOB));
 445         cl_git_fail(git_treebuilder_insert(NULL, builder, ".git::$INDEX_ALLOCATION/dummy-file", &bid, GIT_FILEMODE_BLOB));
 446
 447         git_treebuilder_free(builder);
 448 }
 449
 450 static void test_invalid_objects(bool should_allow_invalid)
 451 {
 452         git_treebuilder *builder;
 453         git_oid valid_blob_id, invalid_blob_id, valid_tree_id, invalid_tree_id;
 454
 455 #define assert_allowed(expr) \
 456         clar__assert(!(expr) == should_allow_invalid, \
 457                 __FILE__, __func__, __LINE__, \
 458                 (should_allow_invalid ? \
 459                  "Expected function call to succeed: " #expr : \
 460                  "Expected function call to fail: " #expr), \
 461                 NULL, 1)
 462
 463         cl_git_pass(git_oid_fromstr(&valid_blob_id, blob_oid));
 464         cl_git_pass(git_oid_fromstr(&invalid_blob_id,
 465                 "1234567890123456789012345678901234567890"));
 466         cl_git_pass(git_oid_fromstr(&valid_tree_id, first_tree));
 467         cl_git_pass(git_oid_fromstr(&invalid_tree_id,
 468                 "0000000000111111111122222222223333333333"));
 469
 470         cl_git_pass(git_treebuilder_new(&builder, g_repo, NULL));
 471
 472         /* test valid blobs and trees (these should always pass) */
 473         cl_git_pass(git_treebuilder_insert(NULL, builder, "file.txt", &valid_blob_id, GIT_FILEMODE_BLOB));
 474         cl_git_pass(git_treebuilder_insert(NULL, builder, "folder", &valid_tree_id, GIT_FILEMODE_TREE));
 475
 476         /* replace valid files and folders with invalid ones */
 477         assert_allowed(git_treebuilder_insert(NULL, builder, "file.txt", &invalid_blob_id, GIT_FILEMODE_BLOB));
 478         assert_allowed(git_treebuilder_insert(NULL, builder, "folder", &invalid_blob_id, GIT_FILEMODE_BLOB));
 479
 480         /* insert new invalid files and folders */
 481         assert_allowed(git_treebuilder_insert(NULL, builder, "invalid_file.txt", &invalid_blob_id, GIT_FILEMODE_BLOB));
 482         assert_allowed(git_treebuilder_insert(NULL, builder, "invalid_folder", &invalid_blob_id, GIT_FILEMODE_BLOB));
 483
 484         /* insert valid blobs as trees and trees as blobs */
 485         assert_allowed(git_treebuilder_insert(NULL, builder, "file_as_folder", &valid_blob_id, GIT_FILEMODE_TREE));
 486         assert_allowed(git_treebuilder_insert(NULL, builder, "folder_as_file.txt", &valid_tree_id, GIT_FILEMODE_BLOB));
 487
 488 #undef assert_allowed
 489
 490         git_treebuilder_free(builder);
 491 }
 492
 493 static void test_inserting_submodule(void)
 494 {
 495         git_treebuilder *bld;
 496         git_oid sm_id;
 497
 498         cl_git_pass(git_oid_fromstr(&sm_id, "da39a3ee5e6b4b0d3255bfef95601890afd80709"));
 499         cl_git_pass(git_treebuilder_new(&bld, g_repo, NULL));
 500         cl_git_pass(git_treebuilder_insert(NULL, bld, "sm", &sm_id, GIT_FILEMODE_COMMIT));
 501         git_treebuilder_free(bld);
 502 }
 503
 504 void test_object_tree_write__object_validity(void)
 505 {
 506         /* Ensure that we cannot add invalid objects by default */
 507         test_invalid_objects(false);
 508         test_inserting_submodule();
 509
 510         /* Ensure that we can turn off validation */
 511         cl_git_pass(git_libgit2_opts(GIT_OPT_ENABLE_STRICT_OBJECT_CREATION, 0));
 512         test_invalid_objects(true);
 513         test_inserting_submodule();
 514 }
 515
 516 void test_object_tree_write__invalid_null_oid(void)
 517 {
 518         git_treebuilder *bld;
 519         git_oid null_oid = {{0}};
 520
 521         cl_git_pass(git_treebuilder_new(&bld, g_repo, NULL));
 522         cl_git_fail(git_treebuilder_insert(NULL, bld, "null_oid_file", &null_oid, GIT_FILEMODE_BLOB));
 523         cl_assert(git_error_last() && strstr(git_error_last()->message, "null OID") != NULL);
 524
 525         git_treebuilder_free(bld);
 526 }