Embedded Postgres for Spring Boot Tests

Question

I\'m building a Spring Boot app, backed by Postgres, using Flyway for database migrations. I\'ve been bumping up against issues where I cannot produce a migration that gener

Answer 1

Another quite clean solution to that problem is to use the TestContainers library. The only caveat is that it requires Docker.

Integration Test:

@RunWith(SpringRunner.class)
@SpringBootTest
@ContextConfiguration(initializers = {ApplicationTestsIT.Initializer.class})
public class ApplicationTestsIT {

    private static int POSTGRES_PORT = 5432;

    @Autowired
    private FooRepository fooRepository;

    @ClassRule
    public static PostgreSQLContainer postgres = new PostgreSQLContainer<>("postgres")
            .withDatabaseName("foo")
            .withUsername("it_user")
            .withPassword("it_pass")
            .withInitScript("sql/init_postgres.sql");

    static class Initializer implements ApplicationContextInitializer {
        public void initialize(ConfigurableApplicationContext configurableApplicationContext) {
            TestPropertyValues.of(
                    "spring.data.postgres.host=" + postgres.getContainerIpAddress(),
                    "spring.data.postgres.port=" + postgres.getMappedPort(POSTGRES_PORT),
                    "spring.data.postgres.username=" + postgres.getUsername(),
                    "spring.data.postgres.password=" + postgres.getPassword()
            ).applyTo(configurableApplicationContext.getEnvironment());
        }
    }

    @Test
    public void fooRepositoryTestIT() {
        ...
    }

Dependency configuration:
pom.xml:

    org.testcontainers
    postgresql
    test

build.gradle:

testCompile "org.testcontainers:postgresql:x.x.x"

Links:
TestContainers - Databases
TestContainers - Postgres Module