add download first for scan cache test

tests/cli/test_scancache_cmd.py

@@ -9,9 +9,13 @@ from modelscope.utils.file_utils import get_modelscope_cache_dir
 class TestScanCacheCommand(unittest.TestCase):
     """Test cases for scancache command in ModelScope CLI."""
 
-    def setUp(self):
+    @classmethod
+    def setUpClass(cls):
         """Set up for tests."""
-        self.fake_cache_dir = '/fake/cache/path'
+        # download one file to ensure the cache directory exists
+        model_id = 'Qwen/Qwen3-0.6B'
+        cmd = f'python -m modelscope.cli.cli download --model {model_id} README.md'
+        subprocess.getstatusoutput(cmd)
 
     def test_scan_default_dir(self):
         cmd = 'python -m modelscope.cli.cli scan-cache'
@@ -26,7 +30,7 @@ class TestScanCacheCommand(unittest.TestCase):
         self.assertIn('Done', output)
 
     def test_scan_not_exist_dir(self):
-        cmd = f'python -m modelscope.cli.cli scan-cache --dir {self.fake_cache_dir}'
+        cmd = 'python -m modelscope.cli.cli scan-cache --dir /fake/cache/path'
         stat, output = subprocess.getstatusoutput(cmd)
         self.assertEqual(stat, 0)
         self.assertIn('not found', output)

tests/hub/test_hub_scan_cache.py

@@ -1,6 +1,7 @@
 # Copyright (c) Alibaba, Inc. and its affiliates.
 import unittest
 
+from modelscope import snapshot_download
 from modelscope.hub.cache_manager import scan_cache_dir
 from modelscope.hub.errors import CacheNotFound
 from modelscope.utils.file_utils import get_modelscope_cache_dir
@@ -11,9 +12,12 @@ logger = get_logger()
 
 class HubScanCacheTest(unittest.TestCase):
 
-    def setUp(self):
+    @classmethod
+    def setUpClass(cls):
         """Set up for tests."""
-        self.fake_cache_dir = '/fake/cache/path'
+        # download one file to ensure the cache directory exists
+        model_id = 'Qwen/Qwen3-0.6B'
+        snapshot_download(model_id, allow_file_pattern='README.md')
 
     def test_scan_default_dir(self):
         """Test scanning the default cache directory."""