SpringTest Testcontainers MongoDBContainer

Giriş

MongoDBContainer yaratmak için tercih edilmeyen bazı yollar şöyle

// direct implementation
MongoDBContainer mongoDBContainer =
  new MongoDBContainer(DockerImageName.parse("mongo:4.0.10")) //Bunu kullan
// generic implementation
MongoDBContainer mongoDBContainer =
  new FixedHostPortGenericContainer("mongo:4.0.10"); //Bunu kullanma

Açıklaması şöyle. Yani esas sebep sabit port numarası kullanılması. Bu da testlerin paralel koşmasına mani.

Both versions should work. The difference is MongoDBContainer will run on a random port while with FixedHostPortGenericContainer you can use a port of your choosing. It simplifies connecting to Mongo a lot, cause you can enforce a good old localhost:27017 this way, so no dynamic configurations would be required.

The problem with this solution is it does not work well if you have multiple tests suits using non-shared container running at once. Processes will often kill MongoDB container in their teardown phase when other suits are already running or will try to start their Mongo and find out the port is already taken.

Örnek

Şöyle yaparız

@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
@Testcontainers
@Import(Configuration.class)
public abstract class BaseApiTest {

  @Container
  static final MongoDBContainer mongo = new MongoDBContainer("mongo:3.6-xenial");

  @DynamicPropertySource
  static void properties(DynamicPropertyRegistry registry) {
    registry.add("spring.data.mongodb.uri", mongo::getReplicaSetUrl);
  }

  @TestConfiguration
  public static class Configuration {

    @Lazy
    @Bean("testSetupMongoClient")
    public MongoClient testSetupMongoClient() {
      return MongoClients.create(mongo.getReplicaSetUrl("test"));
    }
  }
}

Örnek

Şöyle yaparız. Burada Spock kullanılıyor.

@Testcontainers
@SpringBootTest
class SampleSuite extends Specification {
   @Shared
   static MongoDBContainer mongoDBContainer = new MongoDBContainer("mongo:4.0.18-xenial")

   @DynamicPropertySource
   static void mongoProps(DynamicPropertyRegistry registry) {
      mongoDBContainer.start()
      registry.add("spring.data.mongodb.uri", () ->   mongoDBContainer.replicaSetUrl)
   }
   void cleanup() {
      // cleaning up a bit should be a good idea...
      mongoDBContainer.stop()
   }
}