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bpo-37648: Fixed minor inconsistency in some __contains__. (GH-14904)

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The collection's item is now always at the left and
the needle is on the right of ==.
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Serhiy Storchaka 2019-08-04 14:12:48 +03:00 • committed by GitHub
parent 17e52649c0
commit 18b711c5a7
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12 changed files with 86 additions and 22 deletions
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15
Lib/test/list_tests.py
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@ -7,6 +7,7 @@ import os
from functools import cmp_to_key
from test import support, seq_tests
from test.support import ALWAYS_EQ, NEVER_EQ
class CommonTest(seq_tests.CommonTest):
@ -329,6 +330,20 @@ class CommonTest(seq_tests.CommonTest):
self.assertRaises(TypeError, a.remove)
a = self.type2test([1, 2])
self.assertRaises(ValueError, a.remove, NEVER_EQ)
self.assertEqual(a, [1, 2])
a.remove(ALWAYS_EQ)
self.assertEqual(a, [2])
a = self.type2test([ALWAYS_EQ])
a.remove(1)
self.assertEqual(a, [])
a = self.type2test([ALWAYS_EQ])
a.remove(NEVER_EQ)
self.assertEqual(a, [])
a = self.type2test([NEVER_EQ])
self.assertRaises(ValueError, a.remove, ALWAYS_EQ)
class BadExc(Exception):
pass