### Question:
DocumentReference extends AbstractLocalizedEntityReference { @Transient public WikiReference getWikiReference() { return (WikiReference) extractReference(EntityType.WIKI); } DocumentReference(EntityReference reference); protected  DocumentReference(EntityReference reference, EntityReference oldReference, EntityReference newReference);  DocumentReference(EntityReference reference, Locale locale);  DocumentReference(String wikiName, String spaceName, String pageName);  DocumentReference(String wikiName, String spaceName, String pageName, Locale locale);  DocumentReference(String wikiName, String spaceName, String pageName, String language);  DocumentReference(String wikiName, List<String> spaceNames, String pageName);  DocumentReference(String wikiName, List<String> spaceNames, String pageName, Locale locale);  DocumentReference(String pageName, SpaceReference parent);  DocumentReference(LocalDocumentReference localDocumentReference, WikiReference wikiReference);  DocumentReference(String pageName, SpaceReference parent, Locale locale); @Unstable  DocumentReference(String pageName, EntityReference parent, Map<String, Serializable> parameters);  DocumentReference(EntityReference reference, EntityReference parent); @Transient WikiReference getWikiReference(); @Transient DocumentReference setWikiReference(WikiReference wikiReference); @Transient SpaceReference getLastSpaceReference(); @Transient List<SpaceReference> getSpaceReferences(); @Override DocumentReference replaceParent(EntityReference oldParent, EntityReference newParent); @Override DocumentReference replaceParent(EntityReference newParent); @Deprecated LocalDocumentReference getLocaleDocumentReference(); LocalDocumentReference getLocalDocumentReference(); @Override String toString(); static final Type TYPE_PROVIDER; }### Answer:
@Test public void testGetWikiReference() { DocumentReference reference = new DocumentReference("wiki", "space", "page"); assertEquals(new WikiReference("wiki"), reference.getWikiReference()); }