Testcontainers test isolation for all CRUD operations using Spring

Question

I'm facing a problem where one of my integration tests affects the other. For example this delete test:

class DeleteCustomerIntegrationTest extends AbstractConfigurationTest {

   @Test
   void deleteCustomer_shouldReturnStatusNoContent() throws Exception {
   mockMvc.perform(delete("/api/v1/customer/1")).andExpect(status().isNoContent());
   }

Will affect this get list of customer test:

  @Test
  void listCustomers_shouldMatchExpectedResponseObject() throws Exception {
    String expectedJson = """ [object goes here] """;


    mockMvc.perform(get("/api/v1/customers").contentType(MediaType.APPLICATION_JSON)).andExpect(status().isOk())
        .andExpect(content().json(expectedJson));
  }

My test configuration class is:

@AutoConfigureMockMvc
@SpringBootTest
public class AbstractConfigurationTest {

  @Autowired
  protected MockMvc mockMvc;

  private static final PostgreSQLContainer<?> POSTGRESQL_CONTAINER;
  private static final Logger LOGGER = LoggerFactory.getLogger(AbstractConfigurationTest.class);

  static {
    POSTGRESQL_CONTAINER =
        new PostgreSQLContainer<>("postgres:15-alpine").withDatabaseName("customers").withUsername("customers").withPassword("customers")
            .withCopyFileToContainer(MountableFile.forClasspathResource("01_init.sql"), "/docker-entrypoint-initdb.d/01_init.sql")
            .withCopyFileToContainer(MountableFile.forClasspathResource("02_data.sql"), "/docker-entrypoint-initdb.d/02_data.sql")
            .withLogConsumer(new Slf4jLogConsumer(LOGGER));

    POSTGRESQL_CONTAINER.start();
  }

  @DynamicPropertySource
  static void dynamicProperties(DynamicPropertyRegistry registry) {
    registry.add("spring.datasource.url", POSTGRESQL_CONTAINER::getJdbcUrl);
    registry.add("spring.datasource.username", POSTGRESQL_CONTAINER::getUsername);
    registry.add("spring.datasource.password", POSTGRESQL_CONTAINER::getPassword);
    registry.add("spring.datasource.driver-class-name", POSTGRESQL_CONTAINER::getDriverClassName);
  }
}

And then in my test classes I just extend this class as shown above. But i haven't found any solution to isolate the tests in an efficient way.

What i've tried is:

use @DirtiesContext on class level, which will reset the application context before every test class, which can get expensive
use the @Transactional annotation that spring provides for reverting back the state of the data, but it doesn't seem to work with Testcontainers.

I haven't found any mention of this in the documentation either. How are you solving this problem in your projects?

I would recommend to truncate tables after each test using sql script: stackoverflow.com/a/78398620/15000097 — Georgii Lvov
– Georgii Lvov, Commented May 23 at 18:56

Lajos Arpad · Accepted Answer · 2025-05-23 12:57:34Z

0

You can define a constructor

public AbstractConfigurationTest{
    //copy whatever you need
    //- multiple times for performance
    //- cloned for integrity
    //into data members
}

So you can execute mockMvc.perform(get("/api/v1/customers").contentType(MediaType.APPLICATION_JSON)) and possibly clone it if something may override its content. Store it into a data member and then later in the test you can do

mystuff.
    .andExpect(status().isOk())
    .andExpect(content().json(expectedJson))

Make sure you properly defined and initialized mystuff.

answered May 23 at 12:57

Lajos Arpad

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1 Comment

vrz-dev May 30 at 12:41

Sounds more like a workaround. I was looking for a conventional approach to solve this in a good way. But i guess there isn't one except having one container per test class or making your tests never overlap (if possible) or use @DirtiesContext to destroy the spring context between tests

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