[v1] model loader (#9613)

tests_v1/core/test_model_loader.py

@@ -0,0 +1,33 @@
+# 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 torch
+
+from llamafactory.v1.config.model_args import ModelArguments
+from llamafactory.v1.core.model_loader import ModelLoader
+
+
+def test_tiny_qwen():
+    from transformers import Qwen2Config, Qwen2ForCausalLM, Qwen2TokenizerFast
+
+    model_args = ModelArguments(model="llamafactory/tiny-random-qwen2.5")
+    model_loader = ModelLoader(model_args)
+    assert isinstance(model_loader.processor, Qwen2TokenizerFast)
+    assert isinstance(model_loader.model.config, Qwen2Config)
+    assert isinstance(model_loader.model, Qwen2ForCausalLM)
+    assert model_loader.model.dtype == torch.bfloat16
+
+
+if __name__ == "__main__":
+    test_tiny_qwen()