* Make sure that a singleton instance is registered.
*/
@Test
public void testRegistration() {
String authority = "URN:OGC:DEF";
final AuthorityFactory factory = ReferencingFactoryFinder.getCRSAuthorityFactory(authority, null);
assertSame(factory, ReferencingFactoryFinder.getCRSAuthorityFactory (authority, null));
assertSame(factory, ReferencingFactoryFinder.getCSAuthorityFactory (authority, null));
assertSame(factory, ReferencingFactoryFinder.getDatumAuthorityFactory(authority, null));
/*
* Tests the X-OGC namespace, which should be synonymous.