### Question:
KeystoneAuthHolder implements Serializable { public String getId() { return id; }  String getId(); void setId(String id); Calendar getexpiration(); void setexpiration(Calendar expiration); String getServiceUrl(); void setServiceUrl(String serviceUrl);  }### Answer:
@Test public void testGetId() { keystoneAuthHolder.setId("001"); assertEquals("001", keystoneAuthHolder.getId()); }