@Test
public void testSetStartTsToScan() {

  Scan scan = new Scan();
  Assert.assertNull(ThemisScanObserver.getStartTsFromAttribute(scan));
  ThemisScanner.setStartTsToScan(scan, PREWRITE_TS);
  Long actual = ThemisScanObserver.getStartTsFromAttribute(scan);
  Assert.assertEquals(PREWRITE_TS, actual.longValue());
}