[FIXED] Jupyter notebook python library testbook not giving any results

Issue

Here's my jupyter notebook's cell 1 (notebook is called tested.ipynb)

def func(a,b):
   return a+b

Here's the testbook testing python code (tester.py):

import testbook
@testbook.testbook('tested.ipynb',execute=True)
def test_func(tb):
    func=tb.ref("func")
    assert func(1,2)==0

I then run the following command from terminal:

python tester.py

It should fail the unit test. But I'm not getting any output at all. No failures, no messages. How do I make the failure appear?

Solution

That's because you still need to use pytest, or another unit testing library, to run your tests. Note under 'Features' it says:

"Works with any unit testing library - unittest, pytest or nose" -SOURCE

Testbook just makes writing the unit tests easier. See here under 'Unit testing with testbook' for an example of the process of using testbook in your toolchain with pytest, although bear in mind a lot of the syntax doesn't match the the current documentation. And so instead of running python tester.py from the terminal, run the following command from terminal if you've installed pytest:

pytest tester.py

---

One thing I note, is that your import and decorator lines don't match the current documentation. Nevertheless, your code works when using pytest tester.py. However, it may be best to adopt the current best practices illustrated in the documentation to keep your code more robust as development continues.

Answered By - Wayne