import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.test.context.ActiveProfiles;
import org.springframework.test.context.TestPropertySource;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest
@ActiveProfiles(profiles = {"test"})
public class SampleTest {
    @Autowired
    MongoTemplate mongoTemplate;


    //.....  Some Test methods goes here ....

}

spring.data.mongodb.uri=mongodb://<test db ip config goes here>/test_app_db

spring.data.mongodb.uri=mongodb://<dev ip>/app_db