less verbose failure messages #67
Description
The failure messages I get in pytest are very verbose, and show me the context of the AssertionError inside the assertpy library, which isn't very useful.
Can this be turned down somehow, to be more like the output from the assert statement or hamcrest?
eg:
demo.py
from assertpy import assert_that
def test_demo():
assert_that(False).is_equal_to(True)
pytest demo.py
================================================
7F71
========= test session starts =========================================================
platform darwin -- Python 3.6.3, pytest-3.2.3, py-1.4.34, pluggy-0.4.0
rootdir: /tmp, inifile:
collected 1 item
demo.py F
============================================================== FAILURES ===============================================================
______________________________________________________________ test_demo ______________________________________________________________
def test_demo():
> assert_that(False).is_equal_to(True)
demo.py:5:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
../env/lib/python3.6/site-packages/assertpy/assertpy.py:159: in is_equal_to
self._err('Expected <%s> to be equal to <%s>, but was not.' % (self.val, other))
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <assertpy.assertpy.AssertionBuilder object at 0x1099c6588>, msg = 'Expected <False> to be equal to <True>, but was not.'
def _err(self, msg):
"""Helper to raise an AssertionError, and optionally prepend custom description."""
out = '%s%s' % ('[%s] ' % self.description if len(self.description) > 0 else '', msg)
if self.kind == 'warn':
print(out)
return self
elif self.kind == 'soft':
global _soft_err
_soft_err.append(out)
return self
else:
> raise AssertionError(out)
E AssertionError: Expected <False> to be equal to <True>, but was not.
../env/lib/python3.6/site-packages/assertpy/assertpy.py:970: AssertionError
====================================================== 1 failed in 0.11 seconds =======================================================
Vs
demo_assert.py
def test_demo():
assert False == True
pytest demo_assert.py
========================================================= test session starts =========================================================
platform darwin -- Python 3.6.3, pytest-3.2.3, py-1.4.34, pluggy-0.4.0
rootdir: /tmp, inifile:
collected 1 item
demo_assert.py F
============================================================== FAILURES ===============================================================
______________________________________________________________ test_demo ______________________________________________________________
def test_demo():
> assert False == True
E assert False == True
demo_assert.py:5: AssertionError
====================================================== 1 failed in 0.07 seconds =======================================================
Vs
demo_hamcrest.py
from hamcrest import *
def test_demo():
assert_that(False, equal_to(True))
pytest demo_hamcrest.py
========================================================= test session starts =========================================================
platform darwin -- Python 3.6.3, pytest-3.2.3, py-1.4.34, pluggy-0.4.0
rootdir: /tmp, inifile:
collected 1 item
demo.py F
============================================================== FAILURES ===============================================================
______________________________________________________________ test_demo ______________________________________________________________
def test_demo():
#assert_that(False).is_true()
> assert_that(False, equal_to(True))
E AssertionError:
E Expected: <True>
E but: was <False>
demo.py:6: AssertionError
====================================================== 1 failed in 0.14 seconds =======================================================