When running mpd unit tests, add --logging -v=2 to see verbose logs and -v=3
for more verbose logs
Change-Id: I5484f3fd9be4c9e7527d86fa71205e8f025d102a
XML compare function for comparing a subset of MPD or the whole MPD.
The children must appear in the same order but the order of attributes
do not matter.
Change existing tests to use XmlEqual() instead of string comparison.
Change-Id: Ib7f80f52b5bed5b5f7c2517620c8955261a4b6a2