New submission from Robert Collins:
>>> import unittest.mock
>>> o = unittest.mock.mock_open(read_data="fred")
>>> f = o()
>>> f.read()
'fred'
>>> f.read()
''
>>> f.readlines()
[]
>>> f.readline()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/robertc/work/cpython/Lib/unittest/mock.py", line 935, in __call__
return _mock_self._mock_call(*args, **kwargs)
File "/home/robertc/work/cpython/Lib/unittest/mock.py", line 994, in
_mock_call
result = next(effect)
StopIteration
----------
components: Library (Lib)
messages: 263814
nosy: rbcollins
priority: normal
severity: normal
stage: test needed
status: open
title: mock_open()().readline() fails at EOF
type: behavior
versions: Python 3.5, Python 3.6
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue26807>
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