text: #include "ci_string.h"
  
  #include <util/generic/string_ut.h>
  
  class TCaseStringTest: public TTestBase, private TStringTestImpl<TCiString, TTestData<char>> {
  public:
      void TestSpecial() {
          TCiString ss = Data._0123456(); // type 'TCiString' is used as is
          size_t hash_val = ss.hash();
          UNIT_ASSERT(hash_val == 1489244);
      }
  
  public:
      UNIT_TEST_SUITE(TCaseStringTest);
      UNIT_TEST(TestOperators);
      UNIT_TEST(TestOperatorsCI);
  
      UNIT_TEST(TestSpecial);
      UNIT_TEST_SUITE_END();
  };
  
  UNIT_TEST_SUITE_REGISTRATION(TCaseStringTest);
  