thodg/libgit2/tests/libgit2/index/racy.c
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Hash : 3344fddc
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Date : 2021-11-16T23:29:22
refactor: `tests` is now `tests/libgit2` Like we want to separate libgit2 and utility source code, we want to separate libgit2 and utility tests. Start by moving all the tests into libgit2.
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tests/libgit2/index/racy.c
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#include "clar_libgit2.h" #include "../checkout/checkout_helpers.h" #include "index.h" #include "repository.h" static git_repository *g_repo; void test_index_racy__initialize(void) { cl_git_pass(git_repository_init(&g_repo, "diff_racy", false)); } void test_index_racy__cleanup(void) { git_repository_free(g_repo); g_repo = NULL; cl_fixture_cleanup("diff_racy"); } void test_index_racy__diff(void) { git_index *index; git_diff *diff; git_str path = GIT_STR_INIT; cl_git_pass(git_str_joinpath(&path, git_repository_workdir(g_repo), "A")); cl_git_mkfile(path.ptr, "A"); /* Put 'A' into the index */ cl_git_pass(git_repository_index(&index, g_repo)); cl_git_pass(git_index_add_bypath(index, "A")); cl_git_pass(git_index_write(index)); cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL)); cl_assert_equal_i(0, git_diff_num_deltas(diff)); git_diff_free(diff); /* Change its contents quickly, so we get the same timestamp */ cl_git_mkfile(path.ptr, "B"); cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL)); cl_assert_equal_i(1, git_diff_num_deltas(diff)); git_index_free(index); git_diff_free(diff); git_str_dispose(&path); } void test_index_racy__write_index_just_after_file(void) { git_index *index; git_diff *diff; git_str path = GIT_STR_INIT; struct p_timeval times[2]; /* Make sure we do have a timestamp */ cl_git_pass(git_repository_index(&index, g_repo)); cl_git_pass(git_index_write(index)); cl_git_pass(git_str_joinpath(&path, git_repository_workdir(g_repo), "A")); cl_git_mkfile(path.ptr, "A"); /* Force the file's timestamp to be a second after we wrote the index */ times[0].tv_sec = index->stamp.mtime.tv_sec + 1; times[0].tv_usec = index->stamp.mtime.tv_nsec / 1000; times[1].tv_sec = index->stamp.mtime.tv_sec + 1; times[1].tv_usec = index->stamp.mtime.tv_nsec / 1000; cl_git_pass(p_utimes(path.ptr, times)); /* * Put 'A' into the index, the size field will be filled, * because the index' on-disk timestamp does not match the * file's timestamp. */ cl_git_pass(git_index_add_bypath(index, "A")); cl_git_pass(git_index_write(index)); cl_git_mkfile(path.ptr, "B"); /* * Pretend this index' modification happened a second after the * file update, and rewrite the file in that same second. */ times[0].tv_sec = index->stamp.mtime.tv_sec + 2; times[0].tv_usec = index->stamp.mtime.tv_nsec / 1000; times[1].tv_sec = index->stamp.mtime.tv_sec + 2; times[0].tv_usec = index->stamp.mtime.tv_nsec / 1000; cl_git_pass(p_utimes(git_index_path(index), times)); cl_git_pass(p_utimes(path.ptr, times)); cl_git_pass(git_index_read(index, true)); cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL)); cl_assert_equal_i(1, git_diff_num_deltas(diff)); git_str_dispose(&path); git_diff_free(diff); git_index_free(index); } static void setup_race(void) { git_str path = GIT_STR_INIT; git_index *index; git_index_entry *entry; struct stat st; /* Make sure we do have a timestamp */ cl_git_pass(git_repository_index__weakptr(&index, g_repo)); cl_git_pass(git_index_write(index)); cl_git_pass(git_str_joinpath(&path, git_repository_workdir(g_repo), "A")); cl_git_mkfile(path.ptr, "A"); cl_git_pass(git_index_add_bypath(index, "A")); cl_git_mkfile(path.ptr, "B"); cl_git_pass(git_index_write(index)); cl_git_mkfile(path.ptr, ""); cl_git_pass(p_stat(path.ptr, &st)); cl_assert(entry = (git_index_entry *)git_index_get_bypath(index, "A", 0)); /* force a race */ entry->mtime.seconds = (int32_t)st.st_mtime; entry->mtime.nanoseconds = (int32_t)st.st_mtime_nsec; git_str_dispose(&path); } void test_index_racy__smudges_index_entry_on_save(void) { git_index *index; const git_index_entry *entry; setup_race(); /* write the index, which will smudge anything that had the same timestamp * as the index when the index was loaded. that way future loads of the * index (with the new timestamp) will know that these files were not * clean. */ cl_git_pass(git_repository_index__weakptr(&index, g_repo)); cl_git_pass(git_index_write(index)); cl_assert(entry = git_index_get_bypath(index, "A", 0)); cl_assert_equal_i(0, entry->file_size); } void test_index_racy__detects_diff_of_change_in_identical_timestamp(void) { git_index *index; git_diff *diff; cl_git_pass(git_repository_index__weakptr(&index, g_repo)); setup_race(); cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL)); cl_assert_equal_i(1, git_diff_num_deltas(diff)); git_diff_free(diff); } static void setup_uptodate_files(void) { git_str path = GIT_STR_INIT; git_index *index; const git_index_entry *a_entry; git_index_entry new_entry = {{0}}; cl_git_pass(git_repository_index(&index, g_repo)); cl_git_pass(git_str_joinpath(&path, git_repository_workdir(g_repo), "A")); cl_git_mkfile(path.ptr, "A"); /* Put 'A' into the index */ cl_git_pass(git_index_add_bypath(index, "A")); cl_assert((a_entry = git_index_get_bypath(index, "A", 0))); /* Put 'B' into the index */ new_entry.path = "B"; new_entry.mode = GIT_FILEMODE_BLOB; git_oid_cpy(&new_entry.id, &a_entry->id); cl_git_pass(git_index_add(index, &new_entry)); /* Put 'C' into the index */ new_entry.path = "C"; new_entry.mode = GIT_FILEMODE_BLOB; cl_git_pass(git_index_add_from_buffer(index, &new_entry, "hello!\n", 7)); git_index_free(index); git_str_dispose(&path); } void test_index_racy__adding_to_index_is_uptodate(void) { git_index *index; const git_index_entry *entry; setup_uptodate_files(); cl_git_pass(git_repository_index(&index, g_repo)); /* ensure that they're all uptodate */ cl_assert((entry = git_index_get_bypath(index, "A", 0))); cl_assert_equal_i(GIT_INDEX_ENTRY_UPTODATE, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); cl_assert((entry = git_index_get_bypath(index, "B", 0))); cl_assert_equal_i(GIT_INDEX_ENTRY_UPTODATE, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); cl_assert((entry = git_index_get_bypath(index, "C", 0))); cl_assert_equal_i(GIT_INDEX_ENTRY_UPTODATE, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); cl_git_pass(git_index_write(index)); git_index_free(index); } void test_index_racy__reading_clears_uptodate_bit(void) { git_index *index; const git_index_entry *entry; setup_uptodate_files(); cl_git_pass(git_repository_index(&index, g_repo)); cl_git_pass(git_index_write(index)); cl_git_pass(git_index_read(index, true)); /* ensure that no files are uptodate */ cl_assert((entry = git_index_get_bypath(index, "A", 0))); cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); cl_assert((entry = git_index_get_bypath(index, "B", 0))); cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); cl_assert((entry = git_index_get_bypath(index, "C", 0))); cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); git_index_free(index); } void test_index_racy__read_tree_clears_uptodate_bit(void) { git_index *index; git_tree *tree; const git_index_entry *entry; git_oid id; setup_uptodate_files(); cl_git_pass(git_repository_index(&index, g_repo)); cl_git_pass(git_index_write_tree_to(&id, index, g_repo)); cl_git_pass(git_tree_lookup(&tree, g_repo, &id)); cl_git_pass(git_index_read_tree(index, tree)); /* ensure that no files are uptodate */ cl_assert((entry = git_index_get_bypath(index, "A", 0))); cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); cl_assert((entry = git_index_get_bypath(index, "B", 0))); cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); cl_assert((entry = git_index_get_bypath(index, "C", 0))); cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); git_tree_free(tree); git_index_free(index); } void test_index_racy__read_index_smudges(void) { git_index *index, *newindex; const git_index_entry *entry; /* if we are reading an index into our new index, ensure that any * racy entries in the index that we're reading are smudged so that * we don't propagate their timestamps without further investigation. */ setup_race(); cl_git_pass(git_repository_index(&index, g_repo)); cl_git_pass(git_index_new(&newindex)); cl_git_pass(git_index_read_index(newindex, index)); cl_assert(entry = git_index_get_bypath(newindex, "A", 0)); cl_assert_equal_i(0, entry->file_size); git_index_free(index); git_index_free(newindex); } void test_index_racy__read_index_clears_uptodate_bit(void) { git_index *index, *newindex; const git_index_entry *entry; setup_uptodate_files(); cl_git_pass(git_repository_index(&index, g_repo)); cl_git_pass(git_index_new(&newindex)); cl_git_pass(git_index_read_index(newindex, index)); /* ensure that files brought in from the other index are not uptodate */ cl_assert((entry = git_index_get_bypath(newindex, "A", 0))); cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); cl_assert((entry = git_index_get_bypath(newindex, "B", 0))); cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); cl_assert((entry = git_index_get_bypath(newindex, "C", 0))); cl_assert_equal_i(0, (entry->flags_extended & GIT_INDEX_ENTRY_UPTODATE)); git_index_free(index); git_index_free(newindex); }