or download this
my $comp_pass1 = $embed_pass->compare('-0.6,-0.5,-0.4,-0.3,-0.2,0.0,0.
+2,0.3,0.4,0.5', '-0.6,-0.5,-0.4,-0.3,-0.2,0.0,0.2,0.3,0.4,0.5');
...
my $comp_pass2 = $embed_pass->compare('-0.6,-0.5,-0.4,-0.3,-0.2,0.0,0.
+2,0.3,0.4,0.5');
ok( $comp_pass2 == 1, "Compare to comparator got $comp_pass2");