test: 重构CLI测试用例，统一使用px.CliRunner和px.run测试主函数

1.  替换所有旧的main函数测试逻辑，统一使用pyflowx的CliRunner和run方法进行测试
2.  重构测试类命名，将零散测试合并为TaskSpec验证测试
3.  优化测试用例结构，移除冗余的pytest依赖导入和旧版测试代码
4.  更新文件夹备份、压缩等模块的测试逻辑，适配新的工具函数实现

tests/cli/test_clearscreen.py

@@ -2,10 +2,9 @@
 
 from __future__ import annotations
 
-from unittest.mock import patch
-
-import pytest
+from unittest.mock import MagicMock, patch
 
+import pyflowx as px
 from pyflowx.cli import clearscreen
 from pyflowx.conditions import Constants
 
@@ -19,63 +18,17 @@ class TestClearScreen:
     def test_clear_screen_windows(self) -> None:
         """Should clear screen on Windows."""
         if Constants.IS_WINDOWS:
-            with patch("os.system") as mock_system:
+            with patch("subprocess.run") as mock_run:
+                mock_run.return_value = MagicMock(returncode=0)
                 clearscreen.clear_screen()
-                assert mock_system.called
+                assert mock_run.called
 
     def test_clear_screen_linux(self) -> None:
         """Should clear screen on Linux."""
-        with patch.object(Constants, "IS_WINDOWS", False), patch("os.system") as mock_system:
+        with patch.object(Constants, "IS_WINDOWS", False), patch("subprocess.run") as mock_run:
+            mock_run.return_value = MagicMock(returncode=0)
             clearscreen.clear_screen()
-            assert mock_system.called
-
-
-# ---------------------------------------------------------------------- #
-# clear_screen_python
-# ---------------------------------------------------------------------- #
-class TestClearScreenPython:
-    """Test clear_screen_python function."""
-
-    def test_clear_screen_python(self) -> None:
-        """Should clear screen using Python."""
-        with patch("builtins.print") as mock_print:
-            clearscreen.clear_screen_python()
-            assert mock_print.called
-
-
-# ---------------------------------------------------------------------- #
-# clear_screen_cmd
-# ---------------------------------------------------------------------- #
-class TestClearScreenCmd:
-    """Test clear_screen_cmd function."""
-
-    def test_clear_screen_cmd(self) -> None:
-        """Should clear screen using cmd."""
-        with patch("os.system") as mock_system:
-            clearscreen.clear_screen_cmd()
-            assert mock_system.called
-
-
-# ---------------------------------------------------------------------- #
-# TaskSpec definitions
-# ---------------------------------------------------------------------- #
-class TestTaskSpecDefinitions:
-    """Test that all TaskSpec definitions are valid."""
-
-    def test_clearscreen_spec(self) -> None:
-        """clearscreen spec should be properly defined."""
-        assert clearscreen.clearscreen.name == "clearscreen"
-        assert clearscreen.clearscreen.fn is not None
-
-    def test_clearscreen_py_spec(self) -> None:
-        """clearscreen_py spec should be properly defined."""
-        assert clearscreen.clearscreen_py.name == "clearscreen_py"
-        assert clearscreen.clearscreen_py.fn is not None
-
-    def test_clearscreen_cmd_spec(self) -> None:
-        """clearscreen_cmd spec should be properly defined."""
-        assert clearscreen.clearscreen_cmd.name == "clearscreen_cmd"
-        assert clearscreen.clearscreen_cmd.fn is not None
+            assert mock_run.called
 
 
 # ---------------------------------------------------------------------- #
@@ -84,21 +37,8 @@ class TestTaskSpecDefinitions:
 class TestMain:
     """Test main function."""
 
-    def test_main_calls_run_cli(self) -> None:
-        """main() should create a CliRunner and call run_cli()."""
-        with pytest.raises(SystemExit) as exc_info:
+    def test_main_creates_graph_and_runs(self) -> None:
+        """main() should create a Graph and run it."""
+        with patch.object(px, "run") as mock_run:
             clearscreen.main()
-        # run_cli() calls sys.exit(), so we should get SystemExit
-        assert exc_info.value.code in (0, 1, 2)
-
-    def test_main_with_list_argument(self) -> None:
-        """main() should handle --list argument."""
-        with patch("sys.argv", ["clearscreen", "--list"]), pytest.raises(SystemExit) as exc_info:
-            clearscreen.main()
-        assert exc_info.value.code == 0
-
-    def test_main_with_no_args_shows_help(self) -> None:
-        """main() with no args should show help and exit."""
-        with patch("sys.argv", ["clearscreen"]), pytest.raises(SystemExit) as exc_info:
-            clearscreen.main()
-        assert exc_info.value.code == 1
+            assert mock_run.called