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Added unittest self.assertRaises() in context manager. #4

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Added unittest self.assertRaises() in context manager. #4

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4 changes: 3 additions & 1 deletion source/unittest/index.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -511,7 +511,8 @@ exception in the test. Compare these two tests:
:start-after: #end_pymotw_header

The results for both are the same, but the second test using
``assertRaises()`` is more succinct.
``assertRaises()`` is more succinct. ``assertRaises()`` can also be
run as a context manager.

.. {{{cog
.. cog.out(run_script(cog.inFile, '-m unittest -v unittest_exception.py'))
Expand All @@ -522,6 +523,7 @@ The results for both are the same, but the second test using
$ python3 -m unittest -v unittest_exception.py

testAssertRaises (unittest_exception.ExceptionTest) ... ok
testAssertRaisesContext (unittest_exception.ExceptionTest) ... ok
testTrapLocally (unittest_exception.ExceptionTest) ... ok

----------------------------------------------------------------
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4 changes: 4 additions & 0 deletions source/unittest/unittest_exception.py
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Expand Up @@ -27,3 +27,7 @@ def testAssertRaises(self):
'a',
b='c',
)

def testAssertRaisesContext(self):
with self.assertRaises(ValueError):
raises_error('a', b='c')