### Question:
ZookeeperConfiguration implements GovernanceConfiguration { @Override public String getPath(String key) { return getNodePath(key, null); }  @Override void setUrl(URL url); @Override URL getUrl(); @Override void init(); @Override String setConfig(String key, String value); @Override String getConfig(String key); @Override boolean deleteConfig(String key); @Override String setConfig(String group, String key, String value); @Override String getConfig(String group, String key); @Override boolean deleteConfig(String group, String key); @Override String getPath(String key); @Override String getPath(String group, String key);  }### Answer:
@Test public void testGetPath() { assertEquals(Constants.PATH_SEPARATOR + Constants.DEFAULT_ROOT + Constants.PATH_SEPARATOR + "test_key", configuration.getPath("test_key")); try { configuration.getPath(null); fail("should throw IllegalArgumentException for null path"); } catch (IllegalArgumentException e) { } }