self.description = "Provide == conflict (2)"

sp1 = pmpkg("pkg1")
sp1.provides = [ "pkg2" ]
self.addpkg2db("sync", sp1)

sp2 = pmpkg("pkg2")
sp2.conflicts = [ "pkg1" ]
self.addpkg2db("sync", sp2)

self.args = "-S pkg1 pkg2"

self.addrule("PKG_EXIST=pkg1")
self.addrule("!PKG_EXIST=pkg2")