Running Spring Boot test inside Docker container - docker

Question

I am wondering if it is possible to run Spring Boot test inside a Docker container. I would like to test my service in the environment as close to the real one as possible. I am already using Testcontainers and Localstack to setup my environment (Postgres, AWS secrets manager etc.), but couldn't find any way to run my service inside Docker. Ideally I would like to test my service inside Localstack's EC2 instance, but just testing it as Docker container would be sufficient. I have Dockerfile at the root of my project and am using Gradle Palantir plugin to build the container. The bootstrap section of my test:
#Testcontainers
#ActiveProfiles(profiles = {"test","jpa"})
#SpringBootTest(classes = PayoutsApplication.class, webEnvironment=WebEnvironment.RANDOM_PORT,
properties = {"aws.paramstore.enabled=false", "aws.secretsmanager.enabled=false"})
#EnableAutoConfiguration(exclude = {
org.springframework.cloud.aws.autoconfigure.context.ContextInstanceDataAutoConfiguration.class,
org.springframework.cloud.aws.autoconfigure.context.ContextStackAutoConfiguration.class,
org.springframework.cloud.aws.autoconfigure.context.ContextRegionProviderAutoConfiguration.class
})
#TestMethodOrder(OrderAnnotation.class)
#ContextConfiguration(loader = PayoutsApplicationTests.CustomLoader.class)
#TestExecutionListeners(listeners = {DependencyInjectionTestExecutionListener.class, PayoutsApplicationTests.class})
class MyApplicationTests extends AbstractTestExecutionListener {
private static AWSSecretsManager awsSecretsManager;
private static AWSSimpleSystemsManagement ssmClient;
// we need it to execute the listeners
public static class CustomLoader extends SpringBootContextLoader {
#Override
protected SpringApplication getSpringApplication() {
PropertiesListener listener = new PropertiesListener();
ReflectionTestUtils.setField(listener, "awsSecretsManager", awsSecretsManager);
ReflectionTestUtils.setField(listener, "ssmClient", ssmClient);
SpringApplication app = super.getSpringApplication();
app.addListeners(listener);
return app;
}
}
static DockerImageName localstackImage = DockerImageName.parse("localstack/localstack:0.11.3");
private static final LocalStackContainer.Service[] TEST_SERVICES = {
LocalStackContainer.Service.SECRETSMANAGER,
LocalStackContainer.Service.SSM,
LocalStackContainer.Service.EC2,
};
static LocalStackContainer awsLocalStackContainers = new LocalStackContainer(localstackImage)
.withServices(TEST_SERVICES).withEnv("LOCALSTACK_HOSTNAME", "localhost")
.withEnv("HOSTNAME", "localhost");
#Container
public static PostgreSQLContainer<?> postgreSQL =
new PostgreSQLContainer<>("postgres:13.1")
.withUsername("clusteradmin")
.withPassword("testPassword")
.withDatabaseName("public");
#DynamicPropertySource
static void postgresqlProperties(DynamicPropertyRegistry registry) {
registry.add("spring.datasource.url", postgreSQL::getJdbcUrl);
registry.add("spring.datasource.password", postgreSQL::getPassword);
registry.add("spring.datasource.username", postgreSQL::getUsername);
}
...