  @Test
  public void getBigIntFromResultSet() throws SQLException, IOException {

    String[] expectedNames = {"BigInt", "Null BigInt"};
    String[] realValues = {"100", null};
    String[] expectedValues = {"100", ""};
    int[] expectedTypes = {Types.BIGINT, Types.BIGINT};

    ResultSetMetaData metaData = MockResultSetMetaDataBuilder.buildMetaData(expectedNames, expectedTypes);
    ResultSet resultSet = MockResultSetBuilder.buildResultSet(metaData, realValues, expectedTypes);

    ResultSetHelperService service = new ResultSetHelperService();

    String[] columnValues = service.getColumnValues(resultSet);
    assertArrayEquals(expectedValues, columnValues);

  }