I think this file should be removed and all tests of the page engine should extend directly ``aria.jsunit.TestCase``.
A test for which coverage can be computed with node-coverage is not a specific kind of test, it is something which should be available for all tests, so for me, it is not clean to add a new class for this.
To compute coverage, attester can already be used and does not need this (and this could perhaps interfere with coverage computation in attester). If the coverage needs to be computed outside of attester, perhaps the call to ``$$_l.submit`` should be put in a better place, which would be usable for all tests.