[to #42322933] add test condition for GPU availablity

damo/cv_diffusion_image-segmentation不支持cpu环境测试

Link: https://code.alibaba-inc.com/Ali-MaaS/MaaS-lib/codereview/11689517

tests/pipelines/test_ddpm_semantic_segmentation.py

@@ -1,6 +1,8 @@
 # Copyright (c) Alibaba, Inc. and its affiliates.
 import unittest
 
+import torch
+
 from modelscope.pipelines import pipeline
 from modelscope.utils.constant import Tasks
 from modelscope.utils.demo_utils import DemoCompatibilityCheck
@@ -15,6 +17,7 @@ class DDPMImageSemanticSegmentationTest(unittest.TestCase,
         self.model_id = 'damo/cv_diffusion_image-segmentation'
 
     @unittest.skipUnless(test_level() >= 0, 'skip test in current test level')
+    @unittest.skipIf(not torch.cuda.is_available(), 'cuda unittest')
     def test_ddpm_image_semantic_segmentation(self):
         input_location = 'data/test/images/image_ffhq34_00041527.png'