py.test should escape \r in error messages #3443
Description
py.test doesn't escape \r in assertion messages, which makes the assertion failures very hard to understand. This is best demonstrated with an example:
# test.py
def test_stuff():
a = u'\r\n'
assert a == u'\n'$ py.test test.py
============================= test session starts ==============================
platform linux2 -- Python 2.7.14, pytest-3.5.0, py-1.5.3, pluggy-0.6.0
rootdir: /tmp, inifile:
plugins: xdist-1.22.2, forked-0.2, catchlog-1.2.2
collected 1 item
test.py F [100%]
=================================== FAILURES ===================================
__________________________________ test_stuff __________________________________
def test_stuff():
a = u'\r\n'
> assert a == u'\n'
\n' == '\n'ertionError: assert '
E -
E +
test.py:3: AssertionError
=============================== warnings summary ===============================
None
pytest-catchlog plugin has been merged into the core, please remove it from your requirements.
-- Docs: http://doc.pytest.org/en/latest/warnings.html
===================== 1 failed, 1 warnings in 0.02 seconds =====================