route passing validation while using road against oneway

[mfrasca]

the route "La Riviera" in this geofabrik link checks valid, while going against the oneway direction of several of its route segments.
e.g.: 1, 2.

[mfrasca]

my.patch.gz

possibly the unit tests to find gaps for one-way roads used in the opposite direction.

[mfrasca]

please do have a look at this, I've added more unit tests, I'm not so sure about one of them. then implemented the code to pass all unit tests
my.patch.gz