### Question:
JobMetaJsonSerializer extends AbstractMetaJsonSerializer<JobMeta> { @Override protected List<String> getUsedVariables( JobMeta meta ) { return meta.getUsedVariables(); } JobMetaJsonSerializer( Class<JobMeta> aClass );  JobMetaJsonSerializer( JavaType javaType );  JobMetaJsonSerializer( Class<?> aClass, boolean b );   }### Answer:
@Test public void testGetUsedVariables() throws Exception { serializer.getUsedVariables( meta ); verify( meta ).getUsedVariables(); }