How to flush data into db inside active spring transaction?

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Finally I stuck to the following solution:

First, my @Test methods are not running within spring @Transactional support. See this article to know how dangerous it may be. Next, instead of using @Repository beans inside @Test methods I autowire @Service beans which use @Transactional annotation.
The miracle is that @Test method like this 

@Test
@Transactional(propagation = Propagation.NOT_SUPPORTED)
public void testSave() {
    Answer created = createAnswer();
    Long generatedId = answerService.save(created);
//at this moment answer is already in db
    Answer actual=getAnswerById(generatedId);
... }

puts my Answer object into database (just after answerService.save(created);) and method getAnswerById goes to DB and extracts it to check if save was correct.
To eliminate changes made to database in @Test method I recreate database by JdbcTestUtils.executeSqlScript

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