Can you check that an exception is thrown with doctest in Python?

Question

Is it possible to write a doctest unit test that will check that an exception is raised?
For example, if I have a function foo(x) that is supposed to raise an exception if x < 0, how would I write the doctest for that?

Asked By: Lorin Hochstein

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Source

Answer 1

Yes. You can do it. The doctest module documentation and Wikipedia has an example of it.

   >>> x
   Traceback (most recent call last):
     ...
   NameError: name 'x' is not defined

Answered By: cnu

Answer 2

>>> import math
>>> math.log(-2)
Traceback (most recent call last):
 ...
ValueError: math domain error

ellipsis flag # doctest: +ELLIPSIS is not required to use … in Traceback doctest

Answered By: glickind

Answer 3

>>> scope # doctest: +IGNORE_EXCEPTION_DETAIL
Traceback (most recent call last):
NameError: name 'scope' is not defined

Don’t know why the previous answers don’t have the IGNORE_EXCEPTION_DETAIL. I need this for it to work. Py versioin: 3.7.3.

Answered By: runsun

Can you check that an exception is thrown with doctest in Python?

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