### Question:
DebugIsotope extends Isotope implements IIsotope { @Override public String getSymbol() { logger.debug("Getting symbol: ", super.getSymbol()); return super.getSymbol(); } DebugIsotope(String elementSymbol);  DebugIsotope(int atomicNumber, String elementSymbol, int massNumber, double exactMass, double abundance);  DebugIsotope(int atomicNumber, String elementSymbol, double exactMass, double abundance);  DebugIsotope(String elementSymbol, int massNumber);  DebugIsotope(IElement element); @Override Integer getAtomicNumber(); @Override void setAtomicNumber(Integer atomicNumber); @Override String getSymbol(); @Override void setSymbol(String symbol); @Override void addListener(IChemObjectListener col); @Override int getListenerCount(); @Override void removeListener(IChemObjectListener col); @Override void notifyChanged(); @Override void notifyChanged(IChemObjectChangeEvent evt); @Override void setProperty(Object description, Object property); @Override void removeProperty(Object description); @Override T getProperty(Object description); @Override Map<Object, Object> getProperties(); @Override String getID(); @Override void setID(String identifier); @Override void setFlag(int flagType, boolean flagValue); @Override boolean getFlag(int flagType); @Override void addProperties(Map<Object, Object> properties); @Override void setFlags(boolean[] flagsNew); @Override boolean[] getFlags(); @Override Object clone(); @Override IChemObjectBuilder getBuilder(); @Override void setNaturalAbundance(Double naturalAbundance); @Override void setExactMass(Double exactMass); @Override Double getNaturalAbundance(); @Override Double getExactMass(); @Override Integer getMassNumber(); @Override void setMassNumber(Integer massNumber);  }### Answer:
@Test public void testDebugIsotope_String() { IIsotope i = new DebugIsotope("C"); Assert.assertEquals("C", i.getSymbol()); }