[v1] add accelerator (#9607)

tests_v1/accelerator/test_interface.py

@@ -0,0 +1,24 @@
+# Copyright 2025 the LlamaFactory team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+import os
+
+from llamafactory.v1.accelerator.interface import DistributedInterface, DistributedStrategy
+
+
+def test_distributed_interface():
+    DistributedInterface(DistributedStrategy())
+    assert DistributedInterface.rank == int(os.getenv("RANK", "0"))
+    assert DistributedInterface.world_size == int(os.getenv("WORLD_SIZE", "1"))