[ 3126055 ] Added unit tests to verify new AbDetermineArcType(Filename) behavior.
[ 3126055 ] Added unit tests to verify new AbDetermineArcType(Filename) behavior.

rburgstaler/tpabbrevia,rburgstaler/tpabbrevia,rburgstaler/tpabbrevia,rburgstaler/tpabbrevia,rburgstaler/tpabbrevia,rburgstaler/tpabbrevia