### Question:
GroupByStepAnalyzer extends StepAnalyzer<GroupByMeta> { @Override protected void customAnalyze( GroupByMeta meta, IMetaverseNode rootNode ) throws MetaverseAnalyzerException { }  @Override Set<ComponentDerivationRecord> getChangeRecords( final GroupByMeta groupByMeta ); @Override Set<Class<? extends BaseStepMeta>> getSupportedSteps(); @Override IClonableStepAnalyzer newInstance();  }### Answer:
@Test public void testCustomAnalyze() throws Exception { analyzer.customAnalyze( meta, mock( IMetaverseNode.class ) ); }