Hi @SSastry (WMF), I assumed based on your recent edit of Wikitext that this page was out of date and not very useful, so I replaced the content with the brief pointer that remained at Wikitext. I may revert or alter the edit that you made to Wikitext to point back to this page, so that we have the benefit of having an associated talk page.
Moved to Github?
@RobLa-WMF, No, the code is still in gerrit. The github repo is a mirror.
As for this page, the last real edit to the page was done in April 2012, it looks like before I joined WMF even. :) Anyway, I think Gabriel probably created it for recording some notes. "test cases" is kind of not the best name anyway. Maybe Testing would be a good name for recording info about how Parsoid codebase is tested with a section about parser tests. But, for the wikitext page, you want a reference to the parser tests and not everything else ... so, if we do create a Testing page, perhaps you can use a section for info about parser tests.