Move to dynamic fixtures when testing.

[envygeeks]

Right now we have a large set of static fixtures, which drags down our testing performance. Lets switch to single-shot dynamic fixtures, on some of our larger projects we have classes that setup fixtures dynamically and allow us to do stuff like this:

mocked_jekyll.with_base.write "index.md", <<-DATA
  Bad Data
DATA

mocked_jekyll.build
expect(mocked_jekyll.whatever).to eq "this"

You can chain after chain after chain to create a context for your test. This will speed up Jekyll slightly because now we aren't constantly processing large amounts of data, each fixture is guaranteed to be fresh, all testing context is inside of the test and it's easy to see what exactly we are testing.