Added check for es6 methods (harmony)

[qfox]

Fixes #1013

[coveralls]

Coverage remained the same at 98.71% when pulling fef0212 on issues/1013 into 394edc9 on master.

[mikesherov]

might be a good util: isKeylessProperty(node)

[qfox]

Yep. Property?

[mrjoelkemp]

We should maybe think about tree iteration yielding custom classes like an ObjectExpression class that has a list of Property instances. Each Property instance will have the isKeylessProperty method. This avoids the bag of utils. Probably an issue worthy comment?

[qfox]

I really like that idea but realization can be painful. Anyway, we can discuss about it and decide in that issue ;-) So, yep!

[mikesherov]

I see 6 rules changed with only three tests updated. Please add a test to all 6 to prevent coverage regression. If you add the utils method, you'll need to test it in test/utils.js as well.

[mikesherov]

LGTM otherwise.

[coveralls]

Coverage remained the same at 99.0% when pulling 4e70e4c on issues/1013 into fd405cd on master.

[qfox]

About method in utils: I've started to add this but it looks uglier ;-( I suggest to add it as property or method to ObjectExpression node.

[mikesherov]

@zxqfox it's a dangerous path modifying nodes. Let's just stick with what you have for now then, and we can revisit this in the future.

[mikesherov]

LGTM

[mikesherov]

@zxqfox, can you please make sure future commit messages match our documented format from contributing.md:

<rulename>: short message
<emptyline>
Long description (if useful)
<emptyline>
Closes gh-<pullRequestNumber>
Fixes #<issueNumber>