Test that position-try rules are reported.
w: 100, h: 100
Dumping CSS position-try rules: 
@position-try --top (active) {
    width: 100px; @[21:2-21:15]
    height: 100px; @[22:2-22:16]
    top: anchor(--anchor top); @[23:2-23:28]
    width: 100px; @[undefined-undefined]
    height: 100px; @[undefined-undefined]
    top: anchor(--anchor top); @[undefined-undefined]
}
@position-try --bottom (inactive) {
    width: 50px; @[27:2-27:14]
    height: 50px; @[28:2-28:15]
    top: anchor(--anchor bottom); @[29:2-29:31]
    width: 50px; @[undefined-undefined]
    height: 50px; @[undefined-undefined]
    top: anchor(--anchor bottom); @[undefined-undefined]
}
index of active position-try-fallback: 1
w: 50, h: 50
Dumping CSS position-try rules: 
@position-try --top (inactive) {
    width: 100px; @[21:2-21:15]
    height: 100px; @[22:2-22:16]
    top: anchor(--anchor top); @[23:2-23:28]
    width: 100px; @[undefined-undefined]
    height: 100px; @[undefined-undefined]
    top: anchor(--anchor top); @[undefined-undefined]
}
@position-try --bottom (active) {
    width: 50px; @[27:2-27:14]
    height: 50px; @[28:2-28:15]
    top: anchor(--anchor bottom); @[29:2-29:31]
    width: 50px; @[undefined-undefined]
    height: 50px; @[undefined-undefined]
    top: anchor(--anchor bottom); @[undefined-undefined]
}
index of active position-try-fallback: 2
w: 300, h: 300
Dumping CSS position-try rules: 
@position-try --top (inactive) {
    width: 100px; @[21:2-21:15]
    height: 100px; @[22:2-22:16]
    top: anchor(--anchor top); @[23:2-23:28]
    width: 100px; @[undefined-undefined]
    height: 100px; @[undefined-undefined]
    top: anchor(--anchor top); @[undefined-undefined]
}
@position-try --bottom (inactive) {
    width: 50px; @[27:2-27:14]
    height: 50px; @[28:2-28:15]
    top: anchor(--anchor bottom); @[29:2-29:31]
    width: 50px; @[undefined-undefined]
    height: 50px; @[undefined-undefined]
    top: anchor(--anchor bottom); @[undefined-undefined]
}
index of active position-try-fallback: undefined
w: 100, h: 200
Dumping CSS position-try rules: 
@position-try --top (inactive) {
    width: 100px; @[21:2-21:15]
    height: 100px; @[22:2-22:16]
    top: anchor(--anchor top); @[23:2-23:28]
    width: 100px; @[undefined-undefined]
    height: 100px; @[undefined-undefined]
    top: anchor(--anchor top); @[undefined-undefined]
}
@position-try --bottom (inactive) {
    width: 50px; @[27:2-27:14]
    height: 50px; @[28:2-28:15]
    top: anchor(--anchor bottom); @[29:2-29:31]
    width: 50px; @[undefined-undefined]
    height: 50px; @[undefined-undefined]
    top: anchor(--anchor bottom); @[undefined-undefined]
}
index of active position-try-fallback: 0