Polishing.

Move Testcontainer creation into utility.

See #632

mongodb/jmolecules/src/test/java/example/springdata/mongodb/ApplicationIntegrationTests.java

@@ -22,6 +22,7 @@ import example.springdata.mongodb.customer.Customer;
 import example.springdata.mongodb.customer.Customers;
 import example.springdata.mongodb.order.Order;
 import example.springdata.mongodb.order.Orders;
+import example.springdata.mongodb.util.MongoContainers;
 import lombok.RequiredArgsConstructor;
 
 import org.junit.jupiter.api.Test;
@@ -29,16 +30,31 @@ import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.autoconfigure.data.mongo.DataMongoTest;
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.data.mongodb.core.mapping.MongoMappingContext;
+import org.springframework.test.context.DynamicPropertyRegistry;
+import org.springframework.test.context.DynamicPropertySource;
+
+import org.testcontainers.containers.MongoDBContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
 
 /**
  * @author Oliver Drotbohm
  */
 @DataMongoTest
 @RequiredArgsConstructor
+@Testcontainers
 class ApplicationIntegrationTests {
 
 	private final ConfigurableApplicationContext context;
 
+	@Container //
+	private static MongoDBContainer mongoDBContainer = MongoContainers.getDefaultContainer();
+
+	@DynamicPropertySource
+	static void setProperties(DynamicPropertyRegistry registry) {
+		registry.add("spring.data.mongodb.uri", mongoDBContainer::getReplicaSetUrl);
+	}
+
 	@Test
 	void exposesAssociationInMetamodel() {
 

mongodb/jmolecules/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