Using the same files, and the syntax from the SYNOPSIS section of the man page:
grove@mary> perl -E 'use File::MMagic::XS; my $m = File::MMagic::XS->new(); say $m->get_mime("1-wrong.html")' text/plain grove@mary> perl -E 'use File::MMagic::XS; my $m = File::MMagic::XS->new(); say $m->get_mime("2-wrong.html")' text/plain grove@mary> perl -E 'use File::MMagic::XS; my $m = File::MMagic::XS->new(); say $m->get_mime("2-1.html")' text/html grove@mary> perl -E 'use File::MMagic::XS; my $m = File::MMagic::XS->new(); say $m->get_mime("2-2.html")' text/html grove@mary> perl -E 'use File::MMagic::XS; my $m = File::MMagic::XS->new(); say $m->get_mime("2-3.html")' text/html grove@mary> perl -E 'use File::MMagic::XS; my $m = File::MMagic::XS->new(); say $m->get_mime("2-4.html")' text/html grove@mary> perl -E 'use File::MMagic::XS; my $m = File::MMagic::XS->new("/etc/magic"); say $m->get_mime("1-wrong.html")' text/plain grove@mary> perl -E 'use File::MMagic::XS; my $m = File::MMagic::XS->new("/etc/magic"); say $m->get_mime("2-wrong.html")' text/plain grove@mary> perl -E 'use File::MMagic::XS; my $m = File::MMagic::XS->new("/etc/magic"); say $m->get_mime("2-1.html")' text/html grove@mary> perl -E 'use File::MMagic::XS; my $m = File::MMagic::XS->new("/etc/magic"); say $m->get_mime("2-2.html")' text/html grove@mary> perl -E 'use File::MMagic::XS; my $m = File::MMagic::XS->new("/etc/magic"); say $m->get_mime("2-3.html")' text/html grove@mary> perl -E 'use File::MMagic::XS; my $m = File::MMagic::XS->new("/etc/magic"); say $m->get_mime("2-4.html")' text/html