Ignore MongoDB socket connection on Spring Test - spring

Question

I am using mongo in my spring project, but I cant connect to mongo server. Anyone knows a way to ignore this bean when executing tests, because sometimes I dont have the mongo server up and I dont want that this build fail.
I really like to know if I can ignore it using SpringRunner.
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
#RunWith(SpringRunner.class)
#SpringBootTest(classes = { Application.class })
public class ApplicationTests {
#Test
public void contextLoads() {
}
}
Stacktrace:
Caused by: org.springframework.dao.DataAccessResourceFailureException:
Timed out after 30000 ms while waiting for a server that matches WritableServerSelector.
Client view of cluster state is {type=UNKNOWN, servers=[{address=localhost:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketException: localhost}, caused by {java.net.UnknownHostException: localhost}}]; nested exception is com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting for a server that matches WritableServerSelector. Client view of cluster state is {type=UNKNOWN, servers=[{address=localhost:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketException: localhost}, caused by {java.net.UnknownHostException: localhost}}]
Spring components:
<parent>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-parent</artifactId>
<version>Dalston.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
PS I stopped the mongodb at localhost intentionally.

Answer 1

You can disable Spring Boot's auto configuration of MongoDB by adding the following annotation to your ApplicationTests class:
#EnableAutoConfiguration(exclude={MongoAutoConfiguration.class, MongoDataAutoConfiguration.class})
This will prevent Spring Boot from creating the MongoClient (assuming there are no other classes in your test context annotated with #EnableAutoConfiguration or #SpringBootApplication).

Answer 2

I solved using embedded mongodb.
Dependency (https://github.com/flapdoodle-oss/de.flapdoodle.embed.mongo):
<dependency>
<groupId>de.flapdoodle.embed</groupId>
<artifactId>de.flapdoodle.embed.mongo</artifactId>
<scope>test</scope>
</dependency>
I added specific configuration on application-test.yml (execute using spring.profile.active=test)
spring:
data:
mongodb:
database: dbtest
host: localhost
port: 27028
And the ApplicationTests.java
#RunWith(SpringRunner.class)
#SpringBootTest(classes = { Application.class })
public class ApplicationTests {
private static final String LOCALHOST = "127.0.0.1";
private static final String DB_NAME = "dbtest";
private static final int MONGO_TEST_PORT = 27028;
private static MongodProcess mongoProcess;
private static Mongo mongo;
#BeforeClass
public static void initializeDB() throws IOException {
MongodStarter starter = MongodStarter.getDefaultInstance();
IMongodConfig mongodConfig = new MongodConfigBuilder()
.version(Version.Main.V3_3)
.net(new Net(LOCALHOST, MONGO_TEST_PORT, Network.localhostIsIPv6()))
.build();
MongodExecutable mongodExecutable = null;
try {
mongodExecutable = starter.prepare(mongodConfig);
mongoProcess = mongodExecutable.start();
mongo = new MongoClient(LOCALHOST, MONGO_TEST_PORT);
mongo.getDB(DB_NAME);
} finally {
if (mongodExecutable != null)
mongodExecutable.stop();
}
}
#Test
public void contextLoads() {}
#AfterClass
public static void shutdownDB() throws InterruptedException {
if (mongo != null) mongo.close();
if (mongoProcess != null) mongoProcess.stop();
}
}