This little IPython extension gives you the ability to discover and run tests using Nose in an IPython Notebook.
Make sure your IPython Notebook server can import
ipython_nose.py(e.g. copy it to a directory in your
PYTHONPATH, or modify
PYTHONPATHbefore starting IPython Notebook). It's also probably sufficient to have
ipython_nose.pyin the directory from which you run the notebook, e.g.:
$ ls ipython_nose.py $ ipython notebook
You can also install it in a virtualenv in developent mode:
$ cd ipython-nose $ pip install -e .
Add a cell containing:
somewhere in your notebook.
Write tests that conform to Nose conventions, e.g.:
def test_arithmetic(): assert 1+1 == 2
Add a cell consisting of:
to your notebook and run that cell. That will discover your
test_*functions, run them, and report how many passed and how many failed, with stack traces for each failure.
Pass standard nose arguments to the magic:
%nose -v -x
-vis handled specially, but other arguments are passed to nosetests as if they were passed at the command-line.
Renaming tests leaves behind the old name: you might only see N test methods in your notebook, but Nose will discover and run N+1 tests. Not sure how to fix this one.
Links between the stack traces and the code are only cell deep. For example, in a stack trace that looks like:
Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/nose/case.py", line 197, in runTest self.test(*self.arg) File "<ipython-input-10-a3ae96abafeb>", line 2, in test_myfunc assert myfunc() == 42 AssertionError
the frame name
ipython-input-10-a3ae96abafebis a link to cell 10, but not specifically to line 2.
Have a cell magic to only run test-like things in the current cell, e.g.:
%%nose def test_just_this(): assert True
- Taavi Burns <taavi at taaviburns dot ca>
- Greg Ward <greg at gerg dot ca>
Thanks to Fernando Perez and Greg Wilson for tips, ideas, etc.
Thanks to Catherine Devlin for publishing ipython_doctester so we could peek at its guts.
Get the code
git clone https://github.com/taavi/ipython_nose.git
Copyright (c) 2012, Taavi Burns, Greg Ward.
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