### Question:
AAIPropertiesImpl implements AAIProperties { @Override public String getKey() { return UrnPropertiesReader.getVariable(MSO_MSO_KEY); }  @Override URL getEndpoint(); @Override String getSystemName(); @Override AAIVersion getDefaultVersion(); @Override String getAuth(); @Override String getKey(); static final String MSO_MSO_KEY; static final String AAI_AUTH; static final String AAI_ENDPOINT; }### Answer:
@Test public void getKeyTest() { assertEquals("mso.msoKey", AAIPropertiesImpl.MSO_MSO_KEY); }