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Add a diagram for the 5.11 SV class structure, including B::REGEXP.
[perl5.git] / t / op / caller.t
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1#!./perl
2# Tests for caller()
3
4BEGIN {
5 chdir 't' if -d 't';
6 @INC = '../lib';
7 require './test.pl';
d8c5b3c5 8 plan( tests => 78 );
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9}
10
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11my @c;
12
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13print "# Tests with caller(0)\n";
14
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15@c = caller(0);
16ok( (!@c), "caller(0) in main program" );
17
18eval { @c = caller(0) };
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19is( $c[3], "(eval)", "subroutine name in an eval {}" );
20ok( !$c[4], "hasargs false in an eval {}" );
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21
22eval q{ @c = (Caller(0))[3] };
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23is( $c[3], "(eval)", "subroutine name in an eval ''" );
24ok( !$c[4], "hasargs false in an eval ''" );
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25
26sub { @c = caller(0) } -> ();
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27is( $c[3], "main::__ANON__", "anonymous subroutine name" );
28ok( $c[4], "hasargs true with anon sub" );
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29
30# Bug 20020517.003, used to dump core
31sub foo { @c = caller(0) }
32my $fooref = delete $::{foo};
33$fooref -> ();
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34is( $c[3], "(unknown)", "unknown subroutine name" );
35ok( $c[4], "hasargs true with unknown sub" );
36
37print "# Tests with caller(1)\n";
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38
39sub f { @c = caller(1) }
40
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41sub callf { f(); }
42callf();
43is( $c[3], "main::callf", "subroutine name" );
44ok( $c[4], "hasargs true with callf()" );
45&callf;
46ok( !$c[4], "hasargs false with &callf" );
47
07b8c804 48eval { f() };
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49is( $c[3], "(eval)", "subroutine name in an eval {}" );
50ok( !$c[4], "hasargs false in an eval {}" );
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51
52eval q{ f() };
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53is( $c[3], "(eval)", "subroutine name in an eval ''" );
54ok( !$c[4], "hasargs false in an eval ''" );
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55
56sub { f() } -> ();
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57is( $c[3], "main::__ANON__", "anonymous subroutine name" );
58ok( $c[4], "hasargs true with anon sub" );
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59
60sub foo2 { f() }
61my $fooref2 = delete $::{foo2};
62$fooref2 -> ();
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63is( $c[3], "(unknown)", "unknown subroutine name" );
64ok( $c[4], "hasargs true with unknown sub" );
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65
66# See if caller() returns the correct warning mask
67
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68sub show_bits
69{
70 my $in = shift;
71 my $out = '';
72 foreach (unpack('W*', $in)) {
73 $out .= sprintf('\x%02x', $_);
74 }
75 return $out;
76}
77
78sub check_bits
79{
80 my ($got, $exp, $desc) = @_;
81 if (! ok($got eq $exp, $desc)) {
82 diag(' got: ' . show_bits($got));
83 diag('expected: ' . show_bits($exp));
84 }
85}
86
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87sub testwarn {
88 my $w = shift;
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89 my $id = shift;
90 check_bits( (caller(0))[9], $w, "warnings match caller ($id)");
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91}
92
93# NB : extend the warning mask values below when new warnings are added
94{
95 no warnings;
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96 BEGIN { check_bits( ${^WARNING_BITS}, "\0" x 12, 'all bits off via "no warnings"' ) }
97 testwarn("\0" x 12, 'no bits');
2db3864f 98
75b6c4ca 99 use warnings;
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100 BEGIN { check_bits( ${^WARNING_BITS}, "\x55\x55\x55\x55\x55\x55\x55\x55\x55\x55\x55\x05", 'default bits on via "use warnings"' ); }
101 BEGIN { testwarn("\x55\x55\x55\x55\x55\x55\x55\x55\x55\x55\x55\x05", 'all'); }
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102 # run-time :
103 # the warning mask has been extended by warnings::register
886f1e3e 104 testwarn("\x55\x55\x55\x55\x55\x55\x55\x55\x55\x55\x55\x15", 'ahead of w::r');
2db3864f 105
75b6c4ca 106 use warnings::register;
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107 BEGIN { check_bits( ${^WARNING_BITS}, "\x55\x55\x55\x55\x55\x55\x55\x55\x55\x55\x55\x15", 'warning bits on via "use warnings::register"' ) }
108 testwarn("\x55\x55\x55\x55\x55\x55\x55\x55\x55\x55\x55\x15", 'following w::r');
75b6c4ca 109}
f2a7f298 110
111
112# The next two cases test for a bug where caller ignored evals if
113# the DB::sub glob existed but &DB::sub did not (for example, if
114# $^P had been set but no debugger has been loaded). The tests
115# thus assume that there is no &DB::sub: if there is one, they
116# should both pass no matter whether or not this bug has been
117# fixed.
118
119my $debugger_test = q<
120 my @stackinfo = caller(0);
121 return scalar @stackinfo;
122>;
123
124sub pb { return (caller(0))[3] }
125
126my $i = eval $debugger_test;
b3ca2e83 127is( $i, 11, "do not skip over eval (and caller returns 10 elements)" );
f2a7f298 128
129is( eval 'pb()', 'main::pb', "actually return the right function name" );
130
131my $saved_perldb = $^P;
132$^P = 16;
133$^P = $saved_perldb;
134
135$i = eval $debugger_test;
b3ca2e83 136is( $i, 11, 'do not skip over eval even if $^P had been on at some point' );
f2a7f298 137is( eval 'pb()', 'main::pb', 'actually return the right function name even if $^P had been on at some point' );
138
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139print "# caller can now return the compile time state of %^H\n";
140
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141sub hint_exists {
142 my $key = shift;
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143 my $level = shift;
144 my @results = caller($level||0);
d8c5b3c5 145 exists $results[10]->{$key};
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146}
147
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148sub hint_fetch {
149 my $key = shift;
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150 my $level = shift;
151 my @results = caller($level||0);
d8c5b3c5 152 $results[10]->{$key};
b3ca2e83 153}
71860c90 154
d8c5b3c5 155$::testing_caller = 1;
a24d89c9 156
e81465be 157do './op/caller.pl' or die $@;