spring boot + spring data mongoldb + nosqlunit-mongodb

AccountRepositoryTest.java

@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = Application.class)
@ActiveProfiles("test") // activate test configuration
public class AccountRepositoryTest {

    private @Autowired AccountRepository accountRepo;
    private @Autowired ApplicationContext applicationContext; // !!important to have it here
    public @Rule MongoDbRule mongoDbRule = MongoDbRuleBuilder.newMongoDbRule().defaultSpringMongoDb(
            "spring-dbname"); // name should match spring mongodb name

    @Test
    @UsingDataSet(locations = "initialData.json", loadStrategy = LoadStrategyEnum.CLEAN_INSERT) // database initialized from initalData.json
    @ShouldMatchDataSet(location = "expectedData.json")
    public void test1() {
        accountRepo.save(new Account("luochun", "secret"));
        long count = accountRepo.count();
        assertThat(count, equalTo(1L)); //!! test case is isolated
    }

    @Test
    @UsingDataSet(locations = "initialData.json", loadStrategy = LoadStrategyEnum.CLEAN_INSERT) // database initialized from initalData.json
    @ShouldMatchDataSet(location = "expectedData.json")
    public void test2() {
        accountRepo.save(new Account("luochun", "secret"));
        long count = accountRepo.count();
        assertThat(count, equalTo(1L)); //!! test case is isolated
    }
}

build.grade

...
dependencies {
    compile("org.springframework.boot:spring-boot-starter-data-mongodb")
    compile("org.projectlombok:lombok:1.14.8")
    compile("com.google.guava:guava:18.0")
    compile("org.apache.commons:commons-lang3:3.3.2")
    testCompile("org.springframework.boot:spring-boot-starter-test")
    testCompile("com.lordofthejars:nosqlunit-mongodb:0.8.0")
}
...

expectedData.json

{
    "account": [
        {"username":"luochun","password":"secret"}
    ]
}

initialData.json

{
    "account": []
}

MongoTestConfiguration.java

@Configuration
@Profile("test") // def
public class MongoTestConfiguration {

    public @Bean Mongo mongo() {
        return new Fongo("testdb").getMongo();
    }

    public @Bean MongoTemplate mongoTemplate() {
        MongoTemplate mongoTemplate = new MongoTemplate(mongo(), "spring-dbname");
        return mongoTemplate;
    }

}