The walk() interface is change to return a WalkInfo object which
contains both the resolved filename and FileInfo object from stat.
The followSymlinks feature is disabled for now.
Original: 07ca4f9629
After some discussion it was found that assertEquals is more common
in JS (vs assertEqual, assertEq) and sounds better in the negated form:
assertNotEquals vs assertNE.
Original: 4cf39d4a14
