Incorrect coverage report with cover-branches under python 2.7 · Issue #502 · nedbat/coveragepy (original) (raw)

Originally reported by Artem Dayneko (Bitbucket: jamert, GitHub: jamert)

coverage report shows non-zero coverage on completely untested files (tested under 2.7.11 and 3.5.1 on Mac OS X El Capitan - only Python 2 is affected)

Minimal example of code you can see in repository:
https://bitbucket.org/jamert/coverage-branch-report-issue

As preview: code like this

#!python

class Klass(object):
    def method(self):
        while True:
            return 1

while completely untested, shows non-zero coverage with the following configuration:

#!bash

$ cat .coveragerc
[run]
source = src
branch = True

(I would expect zero percent coverage on it).

Steps for reproducing:

#!bash

$ coverage run src/tested.py  # empty file
$ coverage report
Name            Stmts   Miss Branch BrPart  Cover
-------------------------------------------------
src/code.py         4      4      2      0    33%
src/tested.py       0      0      0      0   100%
-------------------------------------------------
TOTAL               4      4      2      0    33%

Under 3.5.1 is shows different numbers:

#!bash

$ coverage report
Name            Stmts   Miss Branch BrPart  Cover
-------------------------------------------------
src/code.py         4      4      0      0     0%
src/tested.py       0      0      0      0   100%
-------------------------------------------------
TOTAL               4      4      0      0     0%

• Bitbucket: https://bitbucket.org/ned/coveragepy/issue/502