Implement test for script installation mtime

Add a test to verify mtime behavior during script installation.

Author: Shrey-N

Lib/test/test_venv.py

@@ -373,6 +373,38 @@ def create_contents(self, paths, filename):
             with open(fn, 'wb') as f:
                 f.write(b'Still here?')
 
+    def test_install_scripts_mtime(self):
+        """
+        Test that install_scripts does not preserve mtime when copying scripts.
+        Using mtime serves as a proxy to verify that shutil.copy2 (and thus 
+        SELinux bin_t contexts) is not being used during script installation.
+        """
+        import time
+        from unittest.mock import patch
+        
+        builder = venv.EnvBuilder()
+        builder.create(self.env_dir)
+        context = builder.ensure_directories(self.env_dir)
+        
+        with tempfile.TemporaryDirectory() as script_dir:
+            common_dir = os.path.join(script_dir, 'common')
+            os.mkdir(common_dir)
+            script_path = os.path.join(common_dir, 'test_script.sh')
+            
+            with open(script_path, 'wb') as f:
+                f.write(b'echo Hello')
+            
+            past_time = time.time() - 10_000_000
+            os.utime(script_path, (past_time, past_time))
+            
+            builder.install_scripts(context, script_dir)
+            
+            dst_path = os.path.join(context.bin_path, 'test_script.sh')
+            self.assertTrue(os.path.exists(dst_path))
+            
+            new_mtime = os.path.getmtime(dst_path)
+            self.assertGreater(new_mtime, past_time + 1000)
+
     def test_overwrite_existing(self):
         """
         Test creating environment in an existing directory.