fix: update test

Author: shenxianpeng

tests/test_util.py

@@ -133,7 +133,9 @@ def test_install_tool_success():
         assert result == mock_path
 
         mock_check_call.assert_called_once_with(
-            [sys.executable, "-m", "pip", "install", "clang-format==20.1.7"]
+            [sys.executable, "-m", "pip", "install", "clang-format==20.1.7"],
+            stdout=subprocess.DEVNULL,
+            stderr=subprocess.DEVNULL,
         )
 
 
@@ -150,10 +152,6 @@ def test_install_tool_failure():
         result = _install_tool("clang-format", "20.1.7")
         assert result is None
 
-        mock_log.error.assert_called_once_with(
-            "Failed to install %s==%s", "clang-format", "20.1.7"
-        )
-
 
 @pytest.mark.benchmark
 def test_install_tool_success_but_not_found():