A mock for non-browser enviorments

[mcwhittemore]

When I started this lib there wasn't a known way to run mapbox-gl-js in a non-web-gl browser environment and so I had this mock only mock mapbox-gl-js functionality. Now that there is a solution for running mapbox-gl-js in a non-web-gl environment, should this mock look into being for Node.js only?

Some questions to answer.

• Does it come with browser mocking?
• Can we move away from mocking the mapbox-gl-js to mocking parts of the browser that mapbox-gl-js needs that aren't in normal browser mocks?
• Are there more feature complete browser mocks than mock-browser that could render this unneeded with the mock-gl-context option?

/cc @davidtheclark @scothis

[scothis]

The WebGL mock you reference will only work for browsers. mapbox-gl-js should already be able to work headless with the node renderer, at least that's what the gl-js unit tests run with. The project will dynamically swaps in a browser implementation for the default node implemented as part of the browserify config.

There could still be an odd impedance mismatch if draw has a hard dependency on the DOM.