SourceSinkFactories.stringCharSourceFactory(),
              asByteSource));
      suite.addTest(
          CharSourceTester.tests(
              "CharSource.empty[]", SourceSinkFactories.emptyCharSourceFactory(), asByteSource));
    }
    suite.addTestSuite(CharSourceTest.class);
    return suite;
  }

  private static final String STRING = ASCII + I18N;