Method TestSort

util/folder/iterator_ut.cpp:176–211

    }

    inline void TestSort() {
        TDirHier dh;
        const TString dir("tmpdir");

        // prepare fs
        {
            TMersenne<ui32> rnd;
            const TString prefixes[] = {
                "a", "b", "xxx", "111", ""};

            dh.AddDir(dir);

            for (size_t i = 0; i < 100; ++i) {
                const TString fname = dir + LOCSLASH_C + prefixes[i % Y_ARRAY_SIZE(prefixes)] + ToString(rnd.GenRand());

                dh.AddFile(fname);
            }
        }

        TVector<TString> fnames;

        {
            TDirIterator d(dir, TDirIterator::TOptions().SetSortByName());

            for (auto it = d.begin(); it != d.end(); ++it) {
                if (it->fts_info == FTS_F) {
                    fnames.push_back(it->fts_name);
                }
            }
        }

        TVector<TString> sorted(fnames);
        Sort(sorted.begin(), sorted.end());

        UNIT_ASSERT_VALUES_EQUAL(JoinWithNewline(fnames), JoinWithNewline(sorted));
    }

    inline void TestError() {
        UNIT_ASSERT_EXCEPTION(TDirIterator("./notexistingfilename"), TDirIterator::TError);