5 use Test::More tests => 7;
7 # Goal of these tests: confirm that Sub::Uplevel will honor (use) a
8 # CORE::GLOBAL::caller override that occurs prior to Sub::Uplevel loading
10 #--------------------------------------------------------------------------#
11 # define a custom caller function that reverses the package name
12 #--------------------------------------------------------------------------#
14 sub _reverse_caller(;$) {
16 my @caller = CORE::caller(++$height);
17 $caller[0] = reverse $caller[0];
18 if( wantarray and !@_ ) {
29 #--------------------------------------------------------------------------#
30 # redefine CORE::GLOBAL::caller then load Sub::Uplevel
31 #--------------------------------------------------------------------------#
34 ok( ! defined *CORE::GLOBAL::caller{CODE},
35 "no global override yet"
39 # old style no warnings 'redefine'
42 *CORE::GLOBAL::caller = \&_reverse_caller;
46 is( *CORE::GLOBAL::caller{CODE}, \&_reverse_caller,
47 "added custom caller override"
50 use_ok('Sub::Uplevel');
52 is( *CORE::GLOBAL::caller{CODE}, \&_reverse_caller,
53 "custom caller override still in place"
59 #--------------------------------------------------------------------------#
60 # define subs *after* caller has been redefined in BEGIN
61 #--------------------------------------------------------------------------#
63 sub test_caller { return scalar caller }
65 sub uplevel_caller { return uplevel 1, \&test_caller }
67 sub test_caller_w_uplevel { return uplevel_caller }
69 #--------------------------------------------------------------------------#
70 # Test for reversed package name both inside and outside an uplevel call
71 #--------------------------------------------------------------------------#
73 is( scalar caller(), '',
74 "caller from main package is empty string"
77 is( test_caller(), reverse("main"),
78 "caller from subroutine calls custom routine"
81 is( test_caller_w_uplevel(), reverse("main"),
82 "caller from uplevel subroutine calls custom routine"