python,django,coverage.py , Coverage.py suggests I need to test for an ImportError — how do I do that?
Coverage.py suggests I need to test for an ImportError — how do I do that?
Question:
Tag: python,django,coverage.py
Just started using coverage.py and am on a testing binge!
At the top of one my python files I have the following (which is used to account for differing versions of Django):
try: # newer versions
from django.contrib.contenttypes.fields import GenericForeignKey
except ImportError: # older versions
from django.contrib.contenttypes.generic import GenericForeignKey
When I run coverage.py it highlights the last two lines (the except ImportError) and flags it as needing a test.
How do I test that in my unittests? Do I need to? It doesn't seem that I should because I don't test all my other imports. Is coverage.py just getting over excited?
Thanks~
Answer:
The simplest way to test that alternate import is to remember why you have that line of code in the first place. The comment says, "older versions." I'm guessing that means older versions of Django. So you are supporting older versions, but it looks like you are not testing with them.
You should run your test suite on all of the versions of Django you support, or at least, the oldest and newest versions. Then you can combine the coverage results from each of those runs. If you do that, those lines will all be covered.
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