def METHOD_NAME(self):
    with patch("tweepy.Client.get_user") as m:
        m.return_value = MagicMock(data=None)
        simulate.combobox_activate_item(self.widget.controls.mode, "Author")
        self.widget.word_list = ["orange"]
        self.widget.search_button.click()
        self.wait_until_finished()
        self.assertTrue(self.widget.Error.wrong_author.is_shown())
        self.assertEqual(
            "Author 'orange' does not exist.", str(self.widget.Error.wrong_author)
        )
        self.assertEqual("Search", self.widget.search_button.text())