### Question:
SearchParamRegistryImpl implements ISearchParamRegistry { @Override public List<JpaRuntimeSearchParam> getActiveUniqueSearchParams(String theResourceName) { List<JpaRuntimeSearchParam> retVal = myActiveUniqueSearchParams.get(theResourceName); if (retVal == null) { retVal = Collections.emptyList(); } return retVal; }  @Override RuntimeSearchParam getActiveSearchParam(String theResourceName, String theParamName); @Override Map<String, RuntimeSearchParam> getActiveSearchParams(String theResourceName); @Override List<JpaRuntimeSearchParam> getActiveUniqueSearchParams(String theResourceName); @Override List<JpaRuntimeSearchParam> getActiveUniqueSearchParams(String theResourceName, Set<String> theParamNames); @PostConstruct void start(); @PreDestroy void stop(); int doRefresh(long theRefreshInterval); @Override RuntimeSearchParam getSearchParamByName(RuntimeResourceDefinition theResourceDef, String theParamName); @Override Collection<RuntimeSearchParam> getSearchParamsByResourceType(RuntimeResourceDefinition theResourceDef); @Override void requestRefresh(); @Override void forceRefresh(); @PostConstruct void scheduleJob(); @Override boolean refreshCacheIfNecessary(); @Override Map<String, Map<String, RuntimeSearchParam>> getActiveSearchParams(); @Override void setPhoneticEncoder(IPhoneticEncoder thePhoneticEncoder); static Map<String, Map<String, RuntimeSearchParam>> createBuiltInSearchParamMap(FhirContext theFhirContext);  }### Answer:
@Test public void testGetActiveUniqueSearchParams_Empty() { assertThat(mySearchParamRegistry.getActiveUniqueSearchParams("Patient"), Matchers.empty()); }