Files
cpython/Lib/test/test_tkinter
2cd5b79284 gh-143990: Allow tkinter.font.Font to wrap a font description (GH-152025)
With exists=True and no name, Font now wraps the font description as is,
without creating a new named font, so that it is used without loss of
precision by actual(), measure() and metrics().  Its name attribute is then
the description rather than a string.  Keyword options now override the
corresponding settings of the given font instead of being ignored.

Co-Authored-By: Claude Opus 4.8 <[email protected]>
2026-07-07 09:37:04 +00:00
..

Writing new tests
=================

Precaution
----------

    New tests should always use only one Tk window at once, like all the
    current tests do. This means that you have to destroy the current window
    before creating another one, and clean up after the test. The motivation
    behind this is that some tests may depend on having its window focused
    while it is running to work properly, and it may be hard to force focus
    on your window across platforms (right now only test_traversal at
    test_ttk.test_widgets.NotebookTest depends on this).