Prevent Spring bean re-initialization for each JUnit test

Question

I have integration tests based on JUnit that access DB. We also use Liquibase Spring bean to init database.

If I try running multiple tests in parallel each of them tries to initialize DB using Liquibase causing locks and eventually failures since only one instance of Liquibase can modify DB at a time.

The tests are configured as follows:

@RunWith(SpringJUnit4ClassRunner.class)
@Transactional
@WebAppConfiguration
@Sql({"/schema/insert-test-data.sql"})

How can I configure DB initialization (schema and data) that it will be done only once and not for each test?

Answer 1

This is just idea not testet, but if you are not executing scripts in parallel what about using ScriptUtils or ResourceDatabasePopulator iside @Before method with some switch.

@Before
public void init(){
    if (wasInitialized)
        return;

    new ResourceDatabasePopulator(new ClassPathResource("path/to/sql.sql")).execute(dataSource);
    wasInitialized = true;
}