A embedded mongodb ...
'de.flapdoodle.embed:de.flapdoodle.embed.mongo:1.21'
<dependency>
<groupId>de.flapdoodle.embed</groupId>
<artifactId>de.flapdoodle.embed.mongo</artifactId>
<version>1.21</version>
</dependency>
<dependency org="de.flapdoodle.embed" name="de.flapdoodle.embed.mongo" rev="1.21"/>
"de.flapdoodle.embed", "de.flapdoodle.embed.mongo", "1.21"