Spring Data MongoDB: Unit tests with repositories

Question

How is it supposed to build some tests with the repository approach in Spring Data MongoDB? I would like to set the test database for my tests since I don't want to use the production database for this purpose. It should be probably possible but I have no idea. This is my application context: ``` <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mongo="http://www.springframework.org/schema/data/mongo" xmlns:neo4j="http://www.springframework.org/schema/data/neo4j" xsi:schemaLocation= "http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/data/mongo http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.x…

Accepted Answer

Jaranda,

I faced the same problem last week and coincidentally I heard about Fongo, "an in-memory java implementation of mongo."

So I decide to use it to test my custom repositories and worked perfectly to me. Below is an example of how to configure Spring to use Fongo in JUnit tests. Note that I'm not using xml configuration.

Hope that will be useful!

```
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration
public class LocationRepositoryTest {

private static final String PLAYER_ID = ObjectId.get().toString();

@Autowired private LocationRepositoryCustom playerRepository;
   @Autowired private MongoTemplate mongoTemplate;

/* Some tests... */

@Configuration
   static class LocationRepositoryTestConfiguration {

@Bean
        public Mongo mongo() {
            // Configure a Fongo instance
            return new Fongo("mongo-test").getMongo();
        }

@Bean
        public MongoTemplate mongoTemplate() {
            return new MongoTemplate(mongo(), "collection-name");
        }

@Bean
        public LocationRepositoryCustom playerRepository() {
            // This is necessary if MongoTemplate is an argument of custom implementation constructor
            return new LocationRepositoryCustomImpl(mongoTemplate());
        }
    }
}
```

Spring Data MongoDB: Unit tests with repositories

Solution

Problem