kevinhongzl commented on code in PR #67356:
URL: https://github.com/apache/airflow/pull/67356#discussion_r4088937375


##########
airflow-core/src/airflow/cli/commands/task_command.py:
##########
@@ -429,6 +430,36 @@ def task_test(args, dag: DAG | None = None) -> None:
         passed_in_params = json.loads(args.task_params)
         sdk_task.params.update(passed_in_params)
 
+        if isinstance(sdk_task, MappedOperator):
+            from airflow.sdk.definitions._internal.expandinput import (
+                DictOfListsExpandInput,
+                ListOfDictsExpandInput,
+            )
+
+            expand_input = sdk_task._get_specified_expand_input()
+
+            expand_input_attr = sdk_task._expand_input_attr
+            if isinstance(expand_input, DictOfListsExpandInput):
+                new_expand_input_dict = dict(expand_input.value)
+                for k in expand_input.value:
+                    if k in passed_in_params:
+                        new_param = passed_in_params[k]
+                        new_expand_input_dict[k] = [new_param] * 
(args.map_index + 1)

Review Comment:
   Really appreciate your review @aaron-y-chen ! Thanks for pointing out the 
Cartesian product case, and I'll give this a fix real quick.



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