@Test
 public void testPrefixBuilder() throws Throwable {
   String built = RestClientBindings.buildSwiftInstancePrefix(SERVICE);
   assertEquals("fs.swift.service." + SERVICE, built);
 }
 @Test(expected = SwiftConfigurationException.class)
 public void testBindAgainstConfIncompleteInstance() throws Exception {
   String instance = RestClientBindings.buildSwiftInstancePrefix(SERVICE);
   conf.unset(instance + DOT_PASSWORD);
   RestClientBindings.bind(filesysURI, conf);
 }
 private void setInstanceVal(Configuration conf, String host, String key, String val) {
   String instance = RestClientBindings.buildSwiftInstancePrefix(host);
   String confkey = instance + key;
   conf.set(confkey, val);
 }