text: #include "dirut.h"
  #include "filelist.h"
  #include "tempdir.h"
  
  #include <library/unittest/registar.h>
  
  #include <util/system/file.h>
  #include <util/generic/string.h>
  
  class TFileListTest: public TTestBase {
      UNIT_TEST_SUITE(TFileListTest);
      UNIT_TEST(TestSimple);
      UNIT_TEST(TestPrefix);
      UNIT_TEST_SUITE_END();
  
  public:
      void TestSimple();
      void TestPrefix();
  };
  
  void TFileListTest::TestSimple() {
      TTempDir tempDir("nonexistingdir");
      MakeDirIfNotExist((tempDir() + LOCSLASH_S "subdir").data());
      TFile((tempDir() + LOCSLASH_S "subdir" LOCSLASH_S "file").data(), CreateAlways);
  
      TFileList fileList;
      fileList.Fill(tempDir().data(), "", "", 1000);
      TString fileName(fileList.Next());
      UNIT_ASSERT_EQUAL(fileName, "subdir" LOCSLASH_S "file");
      UNIT_ASSERT_EQUAL(fileList.Next(), nullptr);
  }
  
  void TFileListTest::TestPrefix() {
      TTempDir tempDir("nonexistingdir");
      TFile((tempDir() + LOCSLASH_S "good_file1").data(), CreateAlways);
      TFile((tempDir() + LOCSLASH_S "good_file2").data(), CreateAlways);
      TFile((tempDir() + LOCSLASH_S "bad_file1").data(), CreateAlways);
      TFile((tempDir() + LOCSLASH_S "bad_file2").data(), CreateAlways);
  
      const bool SORT = true;
      TFileList fileList;
      {
          fileList.Fill(tempDir().data(), "good_file", SORT);
          UNIT_ASSERT_EQUAL(TString(fileList.Next()), "good_file1");
          UNIT_ASSERT_EQUAL(TString(fileList.Next()), "good_file2");
          UNIT_ASSERT_EQUAL(fileList.Next(), nullptr);
      }
      {
          fileList.Fill(tempDir().data(), "bad_file", SORT);
          UNIT_ASSERT_EQUAL(TString(fileList.Next()), "bad_file1");
          UNIT_ASSERT_EQUAL(TString(fileList.Next()), "bad_file2");
          UNIT_ASSERT_EQUAL(fileList.Next(), nullptr);
      }
  }
  
  UNIT_TEST_SUITE_REGISTRATION(TFileListTest);
  