Use testcontainers for MongoDB samples.

...with some exceptions for samples that require a replica set.

See #632

mongodb/gridfs/src/test/java/example/springdata/mongodb/gridfs/GridFsTests.java

@@ -32,7 +32,13 @@ import org.springframework.boot.test.autoconfigure.data.mongo.DataMongoTest;
 import org.springframework.core.io.ClassPathResource;
 import org.springframework.data.mongodb.core.query.Query;
 import org.springframework.data.mongodb.gridfs.GridFsOperations;
+import org.springframework.test.context.DynamicPropertyRegistry;
+import org.springframework.test.context.DynamicPropertySource;
 import org.springframework.util.StreamUtils;
+import org.testcontainers.containers.MongoDBContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
+import org.testcontainers.utility.DockerImageName;
 
 /**
  * Tests to show the usage of {@link GridFsOperations} with Spring Data MongoDB.
@@ -40,9 +46,19 @@ import org.springframework.util.StreamUtils;
  * @author Hartmut Lang
  * @author Mark Paluch
  */
+@Testcontainers
 @DataMongoTest
 class GridFsTests {
 
+	@Container //
+	private static MongoDBContainer mongoDBContainer = new MongoDBContainer(
+			DockerImageName.parse("mongo:5.0"));
+
+	@DynamicPropertySource
+	static void setProperties(DynamicPropertyRegistry registry) {
+		registry.add("spring.data.mongodb.uri", mongoDBContainer::getReplicaSetUrl);
+	}
+
 	@Autowired GridFsOperations gridFsOperations;
 
 	@BeforeEach

mongodb/gridfs/src/test/resources/application.properties

@@ -1,3 +0,0 @@
-# Random port for embedded MongoDB
-spring.data.mongodb.port=0
-spring.mongodb.embedded.version=3.6.0