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Issue #24284: The startswith and endswith methods of the str class no longer

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return True when finding the empty string and the indexes are completely out
of range.
This commit is contained in:
Serhiy Storchaka 2015-05-31 09:15:51 +03:00
parent 3d4a457663
commit d4ea03c785
4 changed files with 17 additions and 3 deletions
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6
Lib/test/string_tests.py
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@ -976,6 +976,9 @@ class MixinStrUnicodeUserStringTest:
self.checkequal(True, 'helloworld', 'startswith', 'lowo', 3)
self.checkequal(True, 'helloworld', 'startswith', 'lowo', 3, 7)
self.checkequal(False, 'helloworld', 'startswith', 'lowo', 3, 6)
self.checkequal(True, '', 'startswith', '', 0, 1)
self.checkequal(True, '', 'startswith', '', 0, 0)
self.checkequal(False, '', 'startswith', '', 1, 0)
# test negative indices
self.checkequal(True, 'hello', 'startswith', 'he', 0, -1)
@ -1022,6 +1025,9 @@ class MixinStrUnicodeUserStringTest:
self.checkequal(False, 'helloworld', 'endswith', 'lowo', 3, 8)
self.checkequal(False, 'ab', 'endswith', 'ab', 0, 1)
self.checkequal(False, 'ab', 'endswith', 'ab', 0, 0)
self.checkequal(True, '', 'endswith', '', 0, 1)
self.checkequal(True, '', 'endswith', '', 0, 0)
self.checkequal(False, '', 'endswith', '', 1, 0)
# test negative indices
self.checkequal(True, 'hello', 'endswith', 'lo', -2)