simulating save into menubar using Qtest

Question

I am trying to simulate save functionality(Tool-Save) using Qtest but not able to find any pointer

#!/usr/bin/python
from PySide2.QtCore import Qt, QEvent
from PySide2.QtWidgets import QApplication
from PySide2.QtGui import (QTextCharFormat, QIcon, QKeySequence,
                           QBrush, QColor, QTextDocument, QFont,
                           QTextCursor, QTextBlockFormat, QFontDatabase)
from PySide2.QtWidgets import (QPlainTextEdit, QSizePolicy, QApplication, QLabel, QGridLayout, QMessageBox, QToolBar, QTextEdit, QCheckBox, QAction,
                               QTableWidget, QTableWidgetItem, QHeaderView, QMenu,
                               QWidget)
from PySide2.QtCore import Qt, QSize, QRegExp, QFile, QTextStream, QRect
from PySide2.QtWidgets import (QMainWindow, QVBoxLayout,
                               QPlainTextEdit, QGridLayout, QGroupBox,
                               QListWidget, QHBoxLayout, QLabel, QLineEdit,
                               QMenuBar, QPushButton, QMessageBox, QDialog,
                               QTextEdit, QVBoxLayout, QWidget, QFormLayout,
                               QCheckBox, QDialogButtonBox,
                               QTableWidget, QTableWidgetItem, QHeaderView)
import sys


class Window(QMainWindow):
    def __init__(self, app):
        super().__init__()


    def create_widget(self):
        self.create_menu()
        self.plain_textedit = QPlainTextEdit()
        self.plain_textedit.setMouseTracking(True)
        self.plain_textedit.viewport().installEventFilter(self)
        main_layout = QVBoxLayout()
        main_layout.addWidget(self.toolbar)
        main_layout.addWidget(self.plain_textedit)
        self.window = QWidget()
        self.window.setLayout(main_layout)
        self.setCentralWidget(self.window)


    def create_menu(self):
        """
        create menu bar into window
        """
        self.toolbar = QToolBar()
        self.toolbar.setStyleSheet("QToolBar {background: #ff8000}")
        self.addToolBar(Qt.TopToolBarArea, self.toolbar)
        menu = QMenu("&Tool", self)
        self.menuBar().addMenu(menu)
        self.actionSave = QAction(QIcon.fromTheme('document-save'),
                                  "&Save", self, shortcut=QKeySequence(Qt.CTRL+Qt.Key_W),
                                  triggered=self.save_data, enabled=True)
        self.toolbar.addAction(self.actionSave)
        menu.addAction(self.actionSave)
        menu.addSeparator()
    
    def save_data(self):
        pass
        
        
    def eventFilter(self, obj, event):
        if obj is self.plain_textedit.viewport():
            print ("plain_1")
       

def main():
    app = QApplication([])
    window = Window(app)
    window.create_widget()
    window.show()
    app.exec_()


if __name__ == "__main__":
    sys.exit(main())

#!/usr/bin/python 
import os
env = os.environ
import unittest
import logging
from PySide2.QtWidgets import QApplication
from PySide2.QtTest import QTest
from PySide2.QtCore import Qt, QEvent
from debug2 import Window

class test(unittest.TestCase):
    def setUp(self):
        self.app = QApplication.instance()
        if self.app is None:
            self.app = QApplication([])

        self.window = Window(self.app)
        self.window.create_widget()
        self.window.show()
        #to open gui and helpful for debug
        #self.app.exec_()

    def tearDown(self):
        self.app.deleteLater()

    def test_save_data(self):
        actions = self.window.menuBar().actions()
        for action in actions:
            sub_commands = action.menu().actions()
            for sub_command in sub_commands:
                if sub_command.text() == "&Save":
                    print (dir(QTest))
                    QTest.mouseClick(self.window.window, Qt.LeftButton)
                #print (sub_command, sub_command.objectName(), sub_command.text())

if __name__ == '__main__':
    unittest.main()