test case failures in test_widgets.ComboboxTest.of test_ttk

test case failures in test_widgets.ComboboxTest.of test_ttk_guionly on OS X with Cocoa Tk 8.5.18

BPO	27313
Nosy	@ned-deily, @ambv, @serhiy-storchaka, @miss-islington
PRs	bpo-27313: Avoid test_ttk_guionly ComboboxTest fail with macOS Cocoa Tk #12011 [3.7] bpo-27313: Avoid test_ttk_guionly ComboboxTest fail with macOS Cocoa Tk (GH-12011) #12012 [3.6] bpo-27313: Avoid test_ttk_guionly ComboboxTest fail with macOS Cocoa Tk (GH-12011) #12013 [2.7] bpo-27313: Avoid test_ttk_guionly ComboboxTest fail with macOS Cocoa Tk #12015 bpo-27313: Fix ttk_guionly tests failing on Framework builds on macOS #29411 [3.10] bpo-27313: Fix ttk_guionly tests failing on Framework builds on macOS (GH-29411) #29422 [3.9] bpo-27313: Fix ttk_guionly tests failing on Framework builds on macOS (GH-29411) #29423 bpo-45160: Use non-deprecated methods for tracing #29425 [3.10] bpo-27313: Use non-deprecated methods for tracing (GH-29425) #29450 [3.9] bpo-27313: Use non-deprecated methods for tracing (GH-29425) #29451

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2019-02-24.08:40:52.766>
created_at = <Date 2016-06-14.01:06:19.947>
labels = ['tests', '3.8', '3.7', 'expert-tkinter']
title = 'test case failures in test_widgets.ComboboxTest.of test_ttk_guionly on OS X with Cocoa Tk 8.5.18'
updated_at = <Date 2021-11-06.19:23:32.253>
user = 'https://github.com/ned-deily'

bugs.python.org fields:

activity = <Date 2021-11-06.19:23:32.253>
actor = 'lukasz.langa'
assignee = 'none'
closed = True
closed_date = <Date 2019-02-24.08:40:52.766>
closer = 'ned.deily'
components = ['Tests', 'Tkinter']
creation = <Date 2016-06-14.01:06:19.947>
creator = 'ned.deily'
dependencies = []
files = []
hgrepos = []
issue_num = 27313
keywords = ['patch']
message_count = 18.0
messages = ['268494', '268513', '268515', '268520', '268531', '268535', '313016', '336443', '336444', '336445', '336449', '336450', '405771', '405776', '405777', '405879', '405882', '405883']
nosy_count = 4.0
nosy_names = ['ned.deily', 'lukasz.langa', 'serhiy.storchaka', 'miss-islington']
pr_nums = ['12011', '12012', '12013', '12015', '29411', '29422', '29423', '29425', '29450', '29451']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue27313'
versions = ['Python 2.7', 'Python 3.6', 'Python 3.7', 'Python 3.8']