* SOAP service should be used.
*/
@Test
public void shouldRetrieveTheSameEcho() throws EanWsException {
final String echo = UUID.randomUUID().toString();
final PingResponse response = Expedia.getPing().echo(echo).call();
assertThat("Echo from response should be equal to input.",
response.getEcho(), is(equalTo(echo)));
// SERVER INFO ATTRIBUTES
final ServerInfo info = response.getServerInfo();
assertThat("Server time should not be empty.",
info.getServerTime(), is(notNullValue()));
assertThat("Timestamp should not be empty.",
info.getTimestamp(), is(notNullValue()));
assertThat("Server instance should not be empty.",