Measure branch coverage about pybuilder

[mriehl]

I added the branch parameter and branch coverage can be seen in the report, but the
analysis call to coverage still only gives me information about statement coverage.

('/tmp/test/src/main/python/foo/__init__.py', [1, 2, 3, 4, 5], [], '')

although

Name    Stmts   Miss Branch BrMiss  Cover   Missing
---------------------------------------------------
foo         5      0      4      2    78% 

Not sure what I can do here. I'm definitely not parsing the report from coverage in either XML or HTML form.
I think this is a problem with coverage itself.

[nedbat]

It's true: the coverage API (methods on the coverage object itself) don't have a way to get the branch numbers. Frankly, I was a little surprised to see this, and that yours is the first request for it! Most people dig into the code to find the information, which is both a little unfortunate and your only option at the moment.

If you look at the code for coverage.analysis(), it calls coverage._analysis(), which creates an Analysis object. That object has a .numbers attribute with the stats you're looking for.

I'm on the verge of undertaking a major overhaul of coverage.py, I'll take this need into account.

[mriehl]

Thanks @nedbat !
I can definitely work with this, but you're going to have to wait a bit longer @aelgru !

[arcivanov]

@mriehl

This is resolved by #160 (https://github.com/pybuilder/pybuilder/pull/153/files#diff-62a96813032655a36d7cf13b53e2cea5R92)

Still no branch coverage in JSON output, not sure if it's necessary though.