fix: create test directories before safety validation

- test_workspace_in_temp_dir_allowed: create/cleanup temp dir
- test_is_safe_workspace: use existing temp dir pattern

Author: github-actions[bot]

tests/unit/video/test_backend_safety.py

@@ -44,9 +44,12 @@ def test_unsafe_workspace_outside_base_dir(self):
     def test_workspace_in_temp_dir_allowed(self):
         """Test workspace in temp directory is allowed."""
         import tempfile
-        temp_workspace = Path(tempfile.gettempdir()) / "test_workspace"
-        
-        assert self.backend._is_safe_workspace(temp_workspace)
+        temp_workspace = Path(tempfile.gettempdir()) / "test_workspace_mg"
+        temp_workspace.mkdir(exist_ok=True)
+        try:
+            assert self.backend._is_safe_workspace(temp_workspace)
+        finally:
+            temp_workspace.rmdir()
 
     def test_nonexistent_workspace_rejected(self):
         """Test non-existent workspace is rejected."""

tests/unit/video/test_html_backend.py

@@ -229,14 +229,15 @@ async def test_render_unsafe_workspace(self):
 
     def test_is_safe_workspace(self):
         """Test workspace safety validation."""
-        # Valid workspace
-        valid_workspace = Path("/tmp/test_workspace")
-        assert self.backend._is_safe_workspace(valid_workspace) is True
-        
         # Test with actual path that exists
         with tempfile.TemporaryDirectory() as tmpdir:
             workspace = Path(tmpdir)
             assert self.backend._is_safe_workspace(workspace) is True
+            
+            # Test with subdirectory that exists
+            sub_workspace = Path(tmpdir) / "test_workspace"
+            sub_workspace.mkdir()
+            assert self.backend._is_safe_workspace(sub_workspace) is True
 
     def test_get_crf_for_quality(self):
         """Test CRF value mapping for quality settings."""