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Idle unittests that use tkinter.Text are developed using the gui widget and then switched, to the current extent possible, to mock_tk.Text. I have done this previously by commenting out gui lines and adding new lines, so it would be possible to switch back if needed. test_searchengine is an example. However, switching back would require commenting and uncommenting several lines.
When reviewing test_autoexpand #18292, I realized that everything after the imports
from tkinter import Text
from idlelib.idle_text.mock_tk import Text
can be made conditional on 'tkinter in str(Text)'. The only comment switching needed is for the import lines. This issue is about retrofitting test_searchengine and any other files that need it.