### Question:
GroupByStepAnalyzer extends StepAnalyzer<GroupByMeta> { @Override public Set<Class<? extends BaseStepMeta>> getSupportedSteps() { return new HashSet<Class<? extends BaseStepMeta>>() { { add( GroupByMeta.class ); } }; }  @Override Set<ComponentDerivationRecord> getChangeRecords( final GroupByMeta groupByMeta ); @Override Set<Class<? extends BaseStepMeta>> getSupportedSteps(); @Override IClonableStepAnalyzer newInstance();  }### Answer:
@Test public void testGetSupportedSteps() throws Exception { GroupByStepAnalyzer analyzer = new GroupByStepAnalyzer(); Set<Class<? extends BaseStepMeta>> types = analyzer.getSupportedSteps(); assertNotNull( types ); assertEquals( types.size(), 1 ); assertTrue( types.contains( GroupByMeta.class ) ); }