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diff_file: test empty workdir file grows after obtaining a diff

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This test was also provided by @jorio
https://github.com/libgit2/libgit2/pull/6208#issuecomment-1034072050
This commit is contained in:
Edward Thomson
2022-02-11 11:02:00 -05:00
parent 9aade20b4e
commit e1415dc3fa
1 changed files with 28 additions and 1 deletions
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29
tests/diff/externalmodifications.c
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@@ -96,7 +96,7 @@ void test_diff_externalmodifications__file_deleted(void)
/* Delete the file */
cl_git_rmfile(path.ptr);
/* Attempt to get a patch */
cl_git_fail(git_patch_from_diff(&patch, diff, 0));
@@ -104,3 +104,30 @@ void test_diff_externalmodifications__file_deleted(void)
git_diff_free(diff);
git_str_dispose(&path);
}
void test_diff_externalmodifications__empty_file_becomes_non_empty(void)
{
git_index *index;
git_diff *diff;
git_patch* patch;
git_str path = GIT_STR_INIT;
cl_git_pass(git_str_joinpath(&path, git_repository_workdir(g_repo), "README"));
/* Empty out the file */
cl_git_mkfile(path.ptr, "");
/* Get a diff */
cl_git_pass(git_repository_index(&index, g_repo));
cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL));
cl_assert_equal_i(1, git_diff_num_deltas(diff));
cl_assert_equal_i(0, git_diff_get_delta(diff, 0)->new_file.size);
/* Simulate file modification after we've gotten the diff */
cl_git_mkfile(path.ptr, "hello");
cl_git_fail(git_patch_from_diff(&patch, diff, 0));
git_index_free(index);
git_diff_free(diff);
git_str_dispose(&path);
}