RegistryCenterNode { public String getDataNodesPath() { return Joiner.on("/").join("", ROOT, DATA_NODES_NAME); }  String getProxyNodePath(final String instanceId); String getDataNodesPath(); String getSchemaPath(final String schemaName); String getDataSourcePath(final String schemaName, final String dataSourceName); Optional<GovernanceSchema> getGovernanceSchema(final String dataSourceNodeFullPath); Collection<String> getAllSchemaPaths(final Collection<String> schemaNames);  }
@Test public void assertGetDataNodesPath() { assertThat(registryCenterNode.getDataNodesPath(), is("/states/datanodes")); }