# 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 unittest
from unittest.mock import MagicMock, patch

from transformers import AutoModelForCausalLM


class TestKernelPlugin(unittest.TestCase):

    @patch('torch.accelerator.current_accelerator')
    def test_apply_kernel(self, mock_get_accelerator):
        mock_device = MagicMock()
        mock_device.type = 'npu'
        mock_get_accelerator.return_value = mock_device

        model = AutoModelForCausalLM.from_pretrained("llamafactory/tiny-random-qwen2.5")

        original_rmsnorm_forward = model.model.layers[0].input_layernorm.forward
        original_swiglu_forward = model.model.layers[0].mlp.forward


        from llamafactory.v1.plugins.model_plugins.kernels.mlp import npu_swiglu
        from llamafactory.v1.plugins.model_plugins.kernels.registry import apply_kernel
        from llamafactory.v1.plugins.model_plugins.kernels.rms_norm import npu_rms_norm
        from llamafactory.v1.plugins.model_plugins.kernels.rope import npu_rope

        apply_kernel(model, npu_rope.NpuRoPEKernel)

        model = apply_kernel(model, npu_rms_norm.NpuRMSNormKernel)
        assert model.model.layers[0].input_layernorm is not original_rmsnorm_forward

        model = apply_kernel(model, npu_swiglu.NpuSwiGluKernel)
        assert model.model.layers[0].mlp.forward is not original_swiglu_forward