add dependency for Hamcrest
<artifactId>hamcrest-library</artifactId>
<scope>test</scope>
</dependency>
+ <!-- https://mvnrepository.com/artifact/org.hamcrest/hamcrest-core -->
+ <dependency>
+ <groupId>org.hamcrest</groupId>
+ <artifactId>hamcrest-core</artifactId>
+ <version>1.3</version>
+ <scope>test</scope>
+ </dependency>
</dependencies>
</project>
