# Import the necessary packages from plone.testing.z2 import Browser import unittest class MyTest(unittest.TestCase): def setUp(self): # Create a new browser object self.browser = Browser() def test_my_function(self): # Specify how the browser should handle errors self.browser.handleErrors = True # Navigate to a page that may cause an error self.browser.open('http://localhost:8080/Plone/my-page') # Assert that the page rendered correctly self.assertTrue('Welcome to my page!' in self.browser.contents)In this example, we create a new Browser object and set the handleErrors attribute to True. We then navigate to a page that may cause an error and assert that the page rendered correctly. The plone.testing.z2 package belongs to the Plone development framework, which is a popular content management system built on top of the Zope web application server.