Fix rendering of mocha's special characters on travis

[marcjansen]

This PR suggests to use a recent version of mocha-phantomjs which fixes the output of the testsuite on travis.

The tasks/test.js had to be adjusted to directly use the mocha-phantomjs binary.

Before:

After:

Please review.

[marcjansen]

Thanks for any review.

[ahocevar]

Wondering about why you switched back to mocha-phantomjs after 98c9b0e. From the package description:

Since 4.0, the phantomjs code now is in mocha-phantomjs-core. If you need full control over which phantomjs version to use and where to get it, or want to use it more programatically like a build system plugin, please use that package directly. This project is a node.js CLI around it.

So I guess there should be a better way than spawning a process, i.e. use mocha-phantomjs-core "more programmatically" somehow. Have you investigated this a bit maybe?

[ahocevar]

The reason why I'm asking is because this looks like a character encoding issue, something like UTF-8 not being used by Travis.

[marcjansen]

I didn't check the 'more programmatic' approach. That would probably be advisable, but I fear my node-foo (and time) are too limited to give this a shot right now. Maybe @tschaub can weigh in about how to proceed, if you don't mind.

[marcjansen]

Looking at https://github.com/nathanboktae/mocha-phantomjs-core/blob/master/README.md it looks both interesting and doable. If you prefer a solution based on the core package, I wouldn't mind if we close this issue, @ahocevar. I am just not sure if I can come up with something quickly.

[ahocevar]

Not sure if I find time, but maybe I can give it a crack this weekend.

[ahocevar]

@marcjansen Please see #4390 for a more programmatic solution.

[marcjansen]

It doesn't get better than #4390. Thanks.