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gh-104089: catch DeprecationWarning in test_fstring #104137

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Merged
AlexWaygood merged 5 commits into from
May 4, 2023
Merged

gh-104089: catch DeprecationWarning in test_fstring #104137

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b6aa4bc
catch DeprecationWarning in `test_fstring`
sunmy2019 May 3, 2023
a06b182
Update Lib/test/test_fstring.py
sunmy2019 May 4, 2023
c1cdec3
Merge branch 'main' into gh-104089
sunmy2019 May 4, 2023
cc232eb
remove unused method
sunmy2019 May 4, 2023
426b94d
Unused import
AlexWaygood May 4, 2023
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17 changes: 12 additions & 5 deletions Lib/test/test_fstring.py
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Original file line number Diff line number Diff line change
Expand Up @@ -980,11 +980,18 @@ def test_roundtrip_raw_quotes(self):
self.assertEqual(fr'\"\'\"\'', '\\"\\\'\\"\\\'')

def test_fstring_backslash_before_double_bracket(self):
self.assertEqual(f'\{{\}}', '\\{\\}')
self.assertEqual(f'\{{', '\\{')
self.assertEqual(f'\{{{1+1}', '\\{2')
self.assertEqual(f'\}}{1+1}', '\\}2')
self.assertEqual(f'{1+1}\}}', '2\\}')
deprecated_cases = [
(r"f'\{{\}}'", '\\{\\}'),
(r"f'\{{'", '\\{'),
(r"f'\{{{1+1}'", '\\{2'),
(r"f'\}}{1+1}'", '\\}2'),
(r"f'{1+1}\}}'", '2\\}')
]
for case, expected_result in deprecated_cases:
with self.subTest(case=case, expected_result=expected_result):
with self.assertWarns(DeprecationWarning):
result = eval(case)
self.assertEqual(result, expected_result)
self.assertEqual(fr'\{{\}}', '\\{\\}')
self.assertEqual(fr'\{{', '\\{')
self.assertEqual(fr'\{{{1+1}', '\\{2')
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