### Question:
IdentifierImpl implements Identifier { @Override public URI getUri() { return this.uri; } IdentifierImpl(URI uriIn);  IdentifierImpl(String idIn);  IdentifierImpl(Identifier identifierBase, String id); static Identifier gensym(String pfx); static Identifier gensym(); @Override URI getUri(); @Override String toString(); @Override boolean equals(Object obj); @Override int hashCode(); @Override String stringValue();  }### Answer:
@Test public void testGetUri() { URI uri = URI.create("com:test"); Identifier id1 = new IdentifierImpl(uri); assertEquals(id1.getUri(), uri); }