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05cf0072a7
test_virtual_events and test_selection_event generate key events after
focus_force(). On Windows these are only delivered once the toplevel is
mapped, so they could be dropped and the test fail. Wait until the
widget is mapped, as the other GUI tests already do.
(cherry picked from commit be4eebb838)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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).