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