### Question:
CeliLanguageIdentifierEnhancementEngine extends AbstractEnhancementEngine<IOException, RuntimeException> implements EnhancementEngine, ServiceProperties { @Override public void computeEnhancements(ContentItem ci) throws EngineException { Entry<IRI, Blob> contentPart = ContentItemHelper.getBlob(ci, SUPPORTED_MIMTYPES); if (contentPart == null) { throw new IllegalStateException("No ContentPart with Mimetype '" + TEXT_PLAIN_MIMETYPE + "' found for ContentItem " + ci.getUri() + ": This is also checked in the canEnhance method! -> This " + "indicated an Bug in the implementation of the " + "EnhancementJobManager!"); } String text = ""; try { text = ContentItemHelper.getText(contentPart.getValue()); } catch (IOException e) { throw new InvalidContentException(this, ci, e); } if (text.trim().length() == 0) { log.info("No text contained in ContentPart {"+contentPart.getKey()+"} of ContentItem {"+ci.getUri()+"}"); return; } try { String[] tmps=text.split(" "); List<GuessedLanguage> lista = null; if(tmps.length>5) lista = this.client.guessLanguage(text); else lista = this.client.guessQueryLanguage(text); Graph g = ci.getMetadata(); ci.getLock().writeLock().lock(); try { GuessedLanguage gl = lista.get(0); IRI textEnhancement = EnhancementEngineHelper.createTextEnhancement(ci, this); g.add(new TripleImpl(textEnhancement, DC_LANGUAGE, new PlainLiteralImpl(gl.getLang()))); g.add(new TripleImpl(textEnhancement, ENHANCER_CONFIDENCE, literalFactory.createTypedLiteral(gl.getConfidence()))); g.add(new TripleImpl(textEnhancement, DC_TYPE, DCTERMS_LINGUISTIC_SYSTEM)); } finally { ci.getLock().writeLock().unlock(); } } catch (IOException e) { throw new EngineException("Error while calling the CELI language" +" identifier service (configured URL: " +serviceURL+")!",e); } catch (SOAPException e) { throw new EngineException("Error wile encoding/decoding the request/" +"response to the CELI language identifier service!",e); } }  @Override @Activate void activate(ComponentContext ctx); @Override int canEnhance(ContentItem ci); @Override void computeEnhancements(ContentItem ci); @Override Map<String, Object> getServiceProperties(); static final Integer defaultOrder; @Property(value = "http://linguagrid.org/LSGrid/ws/language-identifier")
	static final String SERVICE_URL; }### Answer:
@Test public void tesetEngine() throws Exception { ContentItem ci = wrapAsContentItem(TEXT); try { langIdentifier.computeEnhancements(ci); TestUtils.logEnhancements(ci); HashMap<IRI,RDFTerm> expectedValues = new HashMap<IRI,RDFTerm>(); expectedValues.put(Properties.ENHANCER_EXTRACTED_FROM, ci.getUri()); expectedValues.put(Properties.DC_CREATOR, LiteralFactory.getInstance().createTypedLiteral( langIdentifier.getClass().getName())); int numTextAnnotations = validateAllTextAnnotations(ci.getMetadata(), TEXT, expectedValues); assertEquals("A single TextAnnotation is expected by this Test", 1,numTextAnnotations); assertEquals("The detected language for text '"+TEXT+"' MUST BE 'fr'","fr",EnhancementEngineHelper.getLanguage(ci)); int entityAnnoNum = validateAllEntityAnnotations(ci.getMetadata(), expectedValues); assertEquals("No EntityAnnotations are expected",0, entityAnnoNum); } catch (EngineException e) { RemoteServiceHelper.checkServiceUnavailable(e); } }