raise graph not exist when can not find graph by the given tag

mindinsight/datavisual/common/exceptions.py

@@ -118,8 +118,8 @@ class PluginNotAvailableError(MindInsightException):
 
 class GraphNotExistError(MindInsightException):
     """Can not found the given graph."""
-    def __init__(self):
-        error_msg = 'Graph is not exist.'
+    def __init__(self, error_detail=None):
+        error_msg = 'Graph is not exist.' if error_detail is None else f'Graph is not exist. Detail: {error_detail}'
         super(GraphNotExistError, self).__init__(DataVisualErrors.GRAPH_NOT_EXIST,
                                                  error_msg,
                                                  http_code=400)

mindinsight/datavisual/processors/graph_processor.py

@@ -40,7 +40,7 @@ class GraphProcessor(BaseProcessor):
         train_job = self._data_manager.get_train_job_by_plugin(train_id, PluginNameEnum.GRAPH.value)
         if train_job is None:
             raise exceptions.TrainJobNotExistError()
-        if not train_job['tags']:
+        if not train_job['tags'] or (tag is not None and tag not in train_job['tags']):
             raise exceptions.GraphNotExistError()
 
         if tag is None:

tests/utils/tools.py

@@ -59,12 +59,13 @@ def check_loading_done(data_manager, time_limit=15, first_sleep_time=0):
     if first_sleep_time > 0:
         time.sleep(first_sleep_time)
     start_time = time.time()
-    while data_manager.status != DataManagerStatus.DONE.value:
+    while data_manager.status not in (DataManagerStatus.DONE.value, DataManagerStatus.INVALID.value):
         time_used = time.time() - start_time
         if time_used > time_limit:
             break
         time.sleep(0.1)
         continue
+    return bool(data_manager.status == DataManagerStatus.DONE.value)
 
 
 def get_image_tensor_from_bytes(image_string):