### Question:
VisitorInstrumentSupport implements ITccInstrumentSupport { @Override public String getWavelength() { VisitorInstrument inst = (VisitorInstrument) _oe.getInstrument(); return inst.getWavelengthStr(); } private  VisitorInstrumentSupport(ObservationEnvironment oe); static ITccInstrumentSupport create(ObservationEnvironment oe); @Override String getWavelength(); @Override String getPositionAngle(); @Override String getTccConfigInstrument(); @Override String getTccConfigInstrumentOrigin(); @Override String getFixedRotatorConfigName(); @Override String getChopState(); @Override void addGuideDetails(ParamSet p);  }### Answer:
@Test public void testWavelength() throws Exception { VisitorInstrument visitor = getInstrument(); setInstrument(visitor); assertEquals(getWavelength(getSouthResults()), "0.7"); }