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[3.12] gh-121708: Improve test coverage for unittest.util (GH-121713) #121737

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Merged
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Jul 14, 2024
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[3.12] gh-121708: Improve test coverage for unittest.util (GH-121713) #121737

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33 changes: 33 additions & 0 deletions Lib/test/test_unittest/test_util.py
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Original file line number Diff line number Diff line change
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import unittest
from unittest.util import safe_repr, sorted_list_difference, unorderable_list_difference


class TestUtil(unittest.TestCase):
def test_safe_repr(self):
class RaisingRepr:
def __repr__(self):
raise ValueError("Invalid repr()")

class LongRepr:
def __repr__(self):
return 'x' * 100

safe_repr(RaisingRepr())
self.assertEqual(safe_repr('foo'), "'foo'")
self.assertEqual(safe_repr(LongRepr(), short=True), 'x'*80 + ' [truncated]...')

def test_sorted_list_difference(self):
self.assertEqual(sorted_list_difference([], []), ([], []))
self.assertEqual(sorted_list_difference([1, 2], [2, 3]), ([1], [3]))
self.assertEqual(sorted_list_difference([1, 2], [1, 3]), ([2], [3]))
self.assertEqual(sorted_list_difference([1, 1, 1], [1, 2, 3]), ([], [2, 3]))
self.assertEqual(sorted_list_difference([4], [1, 2, 3, 4]), ([], [1, 2, 3]))
self.assertEqual(sorted_list_difference([1, 1], [2]), ([1], [2]))
self.assertEqual(sorted_list_difference([2], [1, 1]), ([2], [1]))
self.assertEqual(sorted_list_difference([1, 2], [1, 1]), ([2], []))

def test_unorderable_list_difference(self):
self.assertEqual(unorderable_list_difference([], []), ([], []))
self.assertEqual(unorderable_list_difference([1, 2], []), ([2, 1], []))
self.assertEqual(unorderable_list_difference([], [1, 2]), ([], [1, 2]))
self.assertEqual(unorderable_list_difference([1, 2], [1, 3]), ([2], [3]))
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