04_honor_later_override.t [plain text]
use lib qw(t/lib);
use strict;
use Test::More tests => 7;
sub _reverse_caller(;$) {
my $height = $_[0];
my @caller = CORE::caller(++$height);
$caller[0] = defined $caller[0] ? reverse $caller[0] : undef;
if( wantarray and !@_ ) {
return @caller[0..2];
}
elsif (wantarray) {
return @caller;
}
else {
return $caller[0];
}
}
BEGIN {
ok( ! defined *CORE::GLOBAL::caller{CODE},
"no global override yet"
);
use_ok('Sub::Uplevel');
is( *CORE::GLOBAL::caller{CODE}, \&Sub::Uplevel::_normal_caller,
"Sub::Uplevel's normal caller override in place"
);
my $old_W = $^W;
$^W = 0;
*CORE::GLOBAL::caller = \&_reverse_caller;
$^W = $old_W
}
is( *CORE::GLOBAL::caller{CODE}, \&_reverse_caller,
"added new, custom caller override"
);
sub test_caller { return scalar caller }
sub uplevel_caller { return uplevel 1, \&test_caller }
sub test_caller_w_uplevel { return uplevel_caller }
is( scalar caller(), undef,
"caller from main package is undef"
);
is( test_caller(), reverse("main"),
"caller from subroutine calls custom routine"
);
is( test_caller_w_uplevel(), reverse("main"),
"caller from uplevel subroutine calls custom routine"
);