Start of split into platform dependent code and testable code

[tangstad]

I started some work on splitting up the code as we discussed earlier. Consider the code so far as just an introductory example to what I was talking about.

If you want I can continue moving stuff into the current split code or I can assist you in the same work, or you can just use it as an example and ignore it ;)

[tagawa]

Thanks for these suggestions. I think I see what you mean.
I'm a bit reluctant to put code in the main library (gumwrapper.js) that's for test purposes only. To keep the distributable part as lightweight as possible, would it still work if window.gumwrapper and its two methods were put in a separate file?

[tangstad]

There shouldn't be any code in gumwrapper.js that is only for testing, there should be some code there that is both for testing and production, and a very very small piece of code that makes the shared code even easier to use for production. At least that's the intention. I guess I should try to make a clearer example.

For example:

gumwrapper.GenericGum = function(gumfunction) {
 ...
};
gumwrapper.GumWrapper = function(...) {
    return gumwrapper.GenericGum(gumwrapper.platformGetUserMedia, ...);
};

Here GenericGum would have all the functionality, but when testing you would provide an alternative/mock function instead of the actual getUserMedia function. Users would use gumwrapper.GumWrapper which automatically uses the correct getUserMedia.