[skip ci]Parser expect for cluster_n_node mode (#10317)

Signed-off-by: zhuwenxing <wenxing.zhu@zilliz.com>

tests/python_client/chaos/test_chaos.py

@@ -5,6 +5,7 @@ from pymilvus import connections
 from chaos.checker import (CreateChecker, InsertFlushChecker,
                            SearchChecker, QueryChecker, IndexChecker, Op)
 from common.cus_resource_opts import CustomResourceOperations as CusResource
+from common.milvus_sys import MilvusSys
 from utils.util_log import test_log as log
 from chaos import chaos_commons as cc
 from common.common_type import CaseLabel
@@ -44,10 +45,20 @@ class TestChaosBase:
         tests_yaml = constants.TESTS_CONFIG_LOCATION + 'testcases.yaml'
         tests_config = cc.gen_experiment_config(tests_yaml)
         test_collections = tests_config.get('Collections', None)
+        ms = MilvusSys(alias="default")
+        node_map = {
+            "querynode": "query_nodes",
+            "datanode": "data_nodes",
+            "indexnode": "index_nodes"
+        }
         for t in test_collections:
             test_chaos = t.get('testcase', {}).get('chaos', {})
             if test_chaos in chaos_yaml:
                 expects = t.get('testcase', {}).get('expectation', {}).get('cluster_1_node', {})
+                # for cluster_n_node mode
+                for node in node_map.keys():
+                    if node in test_chaos and len(getattr(ms, node_map[node])) > 1:
+                        expects = t.get('testcase', {}).get('expectation', {}).get('cluster_n_node', {})
                 log.info(f"yaml.expects: {expects}")
                 self.expect_create = expects.get(Op.create.value, constants.SUCC)
                 self.expect_insert = expects.get(Op.insert.value, constants.SUCC)