return new FileCharSourceFactory();
  }

  public static CharSinkFactory fileCharSinkFactory() {
    return new FileCharSinkFactory(null);
  }

  public static CharSinkFactory appendingFileCharSinkFactory() {
    String initialString = IoTestCase.ASCII + IoTestCase.I18N;
    return new FileCharSinkFactory(initialString);
  }

  public static ByteSourceFactory urlByteSourceFactory() {

    suite.addTest(
        CharSinkTester.tests(
            "Files.asCharSink[File, Charset, APPEND]",
            SourceSinkFactories.appendingFileCharSinkFactory()));
    suite.addTestSuite(FilesTest.class);
    return suite;
  }

  public void testRoundTripSources() throws Exception {
    File asciiFile = getTestFile("ascii.txt");

    suite.addTest(
        CharSinkTester.tests(
            "Files.asCharSink[File, Charset, APPEND]",
            SourceSinkFactories.appendingFileCharSinkFactory()));
    suite.addTestSuite(FilesTest.class);
    return suite;
  }

  public void testRoundTripSources() throws Exception {
    File asciiFile = getTestFile("ascii.txt");