Test # of dom operations with MutationObserver

[jamesplease]

Every action in Puppets should cause at most 2 DOM operations: one for removing what used to be there, and another for adding the new content.

I can test this with MutationObserver.

Q: does JSDom support mutation observer?

[jamesplease]

Q: does JSDom support mutation observer?

A: no

😢

Q2: does phantom support mutation observer? If so, I may switch over.

A2: Phantom 2.0 does apparently, but...it isn't released? Or something? Yup, still in development, so I don't know why they closed that issue.

For my purposes, no, it does not.

Polymer has a polyfill over here that I should look into. It'd be awesome if this polyfill works with JSDom.

[jridgewell]

@megawac also has a MutationObserver shim.

[megawac]

Neither polymers or my implementation will do what you want (we batch after a timeout). You can consider using slimer or firefox + xfvb

[jamesplease]

:(

[jamesplease]

@megawac messaged me some good libraries to check out to implement slimer. The big one is this karma adapter. And apparently there's a mocha adapter for karma, as well.

I guess I'll go the slimer route, assuming it supports MutationObserver.

Thanks for the suggestions @megawac.

[jridgewell]

Karma is awesome. Feel free to reference Minionette for setup.

[jamesplease]

Definitely will. Thanks @jridgewell :)

[jamesplease]

Until I get Karma and Slimer set up I made a quick little repo for testing this sort of thing. Check it out here.