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Minor changes to the unittest.mock.mock_open helper

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This commit is contained in:
Michael Foord 2012-03-25 19:11:50 +01:00
parent 99254730b2
commit 0dccf657b5
1 changed files with 4 additions and 5 deletions
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9
Lib/unittest/mock.py
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@ -2141,7 +2141,8 @@ def __init__(self, spec, spec_set=False, parent=None,
file_spec = None
def mock_open(mock=None, read_data=None):
def mock_open(mock=None, read_data=''):
"""
A helper function to create a mock to replace the use of `open`. It works
for `open` called directly or used as a context manager.
@ -2159,14 +2160,12 @@ def mock_open(mock=None, read_data=None):
file_spec = list(set(dir(_io.TextIOWrapper)).union(set(dir(_io.BytesIO))))
if mock is None:
mock = MagicMock(spec=file_spec)
mock = MagicMock(name='open', spec=open)
handle = MagicMock(spec=file_spec)
handle.write.return_value = None
handle.__enter__.return_value = handle
if read_data is not None:
handle.read.return_value = read_data
handle.read.return_value = read_data
mock.return_value = handle
return mock