New submission from Karthikeyan Singaravelan <tir.kar...@gmail.com>:
With issue37669 it was proposed to refactor out the mock_open handler to return
different mocks per file and an API change to make sure read_data accepts a
dictionary of file and return values it can only land on master if accepter.
It's already possible now with using side_effect to return per file content.
Adding it would be a good example like below so that users can know this usage.
I can prepare a PR for this.
from unittest.mock import mock_open, patch
DEFAULT_MOCK_DATA = "default mock data"
data_dict = {"file1": "data1",
"file2": "data2"}
def open_side_effect(name):
return mock_open(read_data=data_dict.get(name, DEFAULT_MOCK_DATA))()
with patch(f"{__name__}.open", side_effect=open_side_effect):
with open("file1") as file1:
assert file1.read() == "data1"
with open("file2") as file2:
assert file2.read() == "data2"
with open("file1") as file3:
assert file3.read(1) == "d"
assert file1.read() == ""
with open("defaultfile") as file4:
assert file4.read() == "default mock data"
----------
assignee: docs@python
components: Documentation
messages: 352285
nosy: cjw296, docs@python, lisroach, mariocj89, michael.foord, xtreak
priority: normal
severity: normal
status: open
title: Add a recipe in unittest.mock examples about mock_open per file
type: behavior
versions: Python 3.7, Python 3.8, Python 3.9
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue38157>
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