By first summarizing a node tree or node selection and then using the normal deepEqual function we are able to take advantage of native QUnit functionality to make diagnosing a problem easier under failing conditions and reduce the verbosity of the output under passing conditions.
Change-Id: I4af5d69596cf5459aa32f61ee6d5b8355233c3df
* Make nodeSelectionEqual() accept a desc parameter and use it for
building descriptions
* Put the array element number in the desciption too
* Add descriptions for selectNodes tests and pass them through
Change-Id: Icd2894d11516234598cbd984cc8d88f705bfc1d6
