modify tests

[c-harris]

The old approach in the wrapper for testing invoked protected or public static methods. I believe the new approach will allow for the invitation of private methods as well this will allow the methods to be made private

[coveralls]

Coverage remained the same at 100.0% when pulling c72fdd8 on Reduce-mutation-surface into 91424b4 on master.

[coveralls]

Coverage remained the same at 100.0% when pulling a858abc on Reduce-mutation-surface into 91424b4 on master.

[c-harris]

@CyberiaResurrection could you take a look at this branch, hook up infection and if you are happy roll it up?

[CyberiaResurrection]

I'm happy with it, the only problems are the nightly PHP builds on Travis, so up she goes.