[issue18573] In unittest.TestCase.assertWarns doc there is some text about assertRaises()

[py.user]

py.user added the comment:

What about the second line?
It doesn't catch any exception


utest.py

#!/usr/bin/env python3

import unittest

class Test(unittest.TestCase):

    def test_warning(self):
        import warnings

        with self.assertWarns(RuntimeWarning) as cm:
            raise ValueError('f')
            warnings.warn('f', RuntimeWarning)
        print(repr(cm.warning))


[guest@localhost py]$ python3 -m unittest utest
E
======================================================================
ERROR: test_warning (utest.Test)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "./utest.py", line 11, in test_warning
    raise ValueError('f')
ValueError: f

----------------------------------------------------------------------
Ran 1 test in 0.000s

FAILED (errors=1)
[guest@localhost py]$


with commented raise

[guest@localhost py]$ python3 -m unittest utest
RuntimeWarning('f',)
.
----------------------------------------------------------------------
Ran 1 test in 0.000s

OK
[guest@localhost py]$


in the patch I copied terms from the first sentence of the paragraph

----------

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<http://bugs.python.org/issue18573>
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