Move Spring Data REST's multi-store example to Testcontainers.

rest/multi-store/pom.xml

@@ -33,11 +33,18 @@
 			<artifactId>spring-boot-starter-data-mongodb</artifactId>
 		</dependency>
 
+		<!-- Testcontainers -->
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-testcontainers</artifactId>
+			<scope>test</scope>
+		</dependency>
+
 		<dependency>
-			<groupId>de.flapdoodle.embed</groupId>
-			<artifactId>de.flapdoodle.embed.mongo</artifactId>
-			<version>4.16.2</version>
-			<scope>runtime</scope>
+			<groupId>org.testcontainers</groupId>
+			<artifactId>mongodb</artifactId>
+			<scope>test</scope>
 		</dependency>
 
 	</dependencies>

rest/multi-store/src/test/java/example/springdata/multistore/ApplicationIntegrationTests.java

@@ -24,6 +24,11 @@
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.boot.testcontainers.service.connection.ServiceConnection;
+import org.springframework.context.annotation.Bean;
+import org.testcontainers.containers.MongoDBContainer;
+import org.testcontainers.utility.DockerImageName;
 
 /**
  * Integration test to show the usage of repositories backed by different stores.
@@ -37,6 +42,16 @@ public class ApplicationIntegrationTests {
 	@Autowired PersonRepository personRepository;
 	@Autowired TreasureRepository treasureRepository;
 
+	@TestConfiguration
+	static class Infrastructure {
+
+		@Bean
+		@ServiceConnection
+		MongoDBContainer mongoDBContainer() {
+			return new MongoDBContainer(DockerImageName.parse("mongodb/mongodb-community-server"));
+		}
+	}
+
 	@Test
 	public void useMultipleRepositories() {