es6 imports & branch coverage with babel

[MIJOTHY]

This babel-generated line is throwing up an uncovered branch for me when using import blah from "blah".

function _interopRequireWildcard(obj) { Eif (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj["default"] = obj; return newObj; } }

I've seen a similar issue here but it's closed for that module. I'm wondering if I'm missing something that can help with this?

Using istanbul 0.3.17 & babel 5.4.7.

[MIJOTHY]

Just noticed - this only applies to the HTML reporting and not the lcov

[cpinnix]

Running into this same problem

Istanbul 0.3.17 Babel 5.8.21

karma.conf.js here: https://gist.github.com/cpinnix/a632946266571a6dff19

[kpdecker]

I can't speak to how Istanbul might formally support this but there are two options provided by outside projects today:

1. Using the auxiliaryCommentBefore: 'istanbul ignore next' option in babel Ex: https://github.com/wycats/handlebars.js/blob/master/Gruntfile.js#L49
2. Use the https://github.com/douglasduteil/isparta istanbul fork.

Pros and cons to each but I've been able to get to 100% coverage for projects using both techniques.

[JoelOtter]

I get the same issue with isparta, but using the auxiliaryCommentBefore worked nicely. Thanks @kpdecker 👍

[jethrolarson]

Doesn't seem to work anymore https://github.com/babel/babel/issues/3844