python conditional coverage for subexpression

Question

I'm trying to find a python code coverage tool which can measure if subexpressions are covered in a statement:

For instance, I'd like to see if condition1/condition2/condtion3 is covered in following example?

if condition1 or condition2 or condition3: x = true_value

Answer 1

The only reasonable answer to this is: There is no current out-of-the-box implementation.

The closest thing which has branch coverage is Ned Batchelder's coverage.py tool.

NB: Implementing this would not be trivial by any means.

As pointed out by @Ira Baxter it is possible to implement.

Answer 2

instrumental does provide condition coverage for python applications but it is not maintained anymore, and its source repository on Bitbucket has been deleted. From an issue on the archived repo:

Matthew Desmarais REPO OWNER Hi Arun,

As.you can see, I haven't really worked on this in a couple of years and probably won't again soon.

[...]

2019-06-02

that being said, if your code works on Python 2.7 or one of the earlier Python 3 releases, it may be good enough

While I wasn't able to integrate it with tox, it does work both with pytest and hypothesis on Python 2.7