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tests: object: test looking up corrupted objects

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We currently have no tests which check whether we fail reading corrupted
objects. Add one which modifies contents of an object stored on disk and
then tries to read the object.
This commit is contained in:
Patrick Steinhardt 2017-04-10 09:00:51 +02:00
parent 86c035526d
commit d59dabe5cb
1 changed files with 30 additions and 0 deletions
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30
tests/object/lookup.c
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@ -62,3 +62,33 @@ void test_object_lookup__lookup_wrong_type_eventually_returns_enotfound(void)
GIT_ENOTFOUND, git_object_lookup(&object, g_repo, &oid, GIT_OBJ_TAG));
}
void test_object_lookup__lookup_corrupt_object_returns_error(void)
{
const char *commit = "8e73b769e97678d684b809b163bebdae2911720f",
*file = "objects/8e/73b769e97678d684b809b163bebdae2911720f";
git_buf path = GIT_BUF_INIT, contents = GIT_BUF_INIT;
git_oid oid;
git_object *object;
size_t i;
cl_git_pass(git_oid_fromstr(&oid, commit));
cl_git_pass(git_buf_joinpath(&path, git_repository_path(g_repo), file));
cl_git_pass(git_futils_readbuffer(&contents, path.ptr));
/* Corrupt and try to read the object */
for (i = 0; i < contents.size; i++) {
contents.ptr[i] ^= 0x1;
cl_git_pass(git_futils_writebuffer(&contents, path.ptr, O_RDWR, 0644));
cl_git_fail(git_object_lookup(&object, g_repo, &oid, GIT_OBJ_COMMIT));
contents.ptr[i] ^= 0x1;
}
/* Restore original content and assert we can read the object */
cl_git_pass(git_futils_writebuffer(&contents, path.ptr, O_RDWR, 0644));
cl_git_pass(git_object_lookup(&object, g_repo, &oid, GIT_OBJ_COMMIT));
git_object_free(object);
git_buf_free(&path);
git_buf_free(&contents);
}