Vajrasky Kok added the comment:
I redo the test as Terry J. Reedy suggested. I use label in loop, utilize
subTest receiving label parameter, and pass messages to only necessary asserts.
So roughly if the test fails, we would get something like this:
======================================================================
FAIL: test_copying (__main__.TestOrderedDict) (label='OrderedDict(od)')
----------------------------------------------------------------------
Traceback (most recent call last):
File "Lib/test/test_collections.py", line 1237, in test_copying
self.assertTrue(dup is not dup, msg)
AssertionError: False is not true :
copy: OrderedDict([('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)])
od: OrderedDict([('c', 1), ('b', 2), ('a', 3), ('d', 4), ('e', 5), ('f', 6)])
======================================================================
FAIL: test_copying (__main__.TestCounter) (label='Counter(words)')
----------------------------------------------------------------------
Traceback (most recent call last):
File "Lib/test/test_collections.py", line 942, in test_copying
self.assertEqual(type(dup), type(''), msg)
AssertionError: <class 'collections.Counter'> != <class 'str'> :
copy: Counter({'which': 2, 'witches': 1, 'witch': 1, 'watch': 1, 'wrist': 1,
'had': 1})
words: Counter({'which': 2, 'witches': 1, 'had': 1, 'watch': 1, 'witch': 1,
'wrist': 1})
----------
Added file: http://bugs.python.org/file30443/test_with_label_and_subTest.patch
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