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|
#!./perl
# Tests for caller()
BEGIN {
chdir 't' if -d 't';
@INC = '../lib';
require './test.pl';
plan( tests => 78 );
}
my @c;
print "# Tests with caller(0)\n";
@c = caller(0);
ok( (!@c), "caller(0) in main program" );
eval { @c = caller(0) };
is( $c[3], "(eval)", "subroutine name in an eval {}" );
ok( !$c[4], "hasargs false in an eval {}" );
eval q{ @c = (Caller(0))[3] };
is( $c[3], "(eval)", "subroutine name in an eval ''" );
ok( !$c[4], "hasargs false in an eval ''" );
sub { @c = caller(0) } -> ();
is( $c[3], "main::__ANON__", "anonymous subroutine name" );
ok( $c[4], "hasargs true with anon sub" );
# Bug 20020517.003, used to dump core
sub foo { @c = caller(0) }
my $fooref = delete $::{foo};
$fooref -> ();
is( $c[3], "main::__ANON__", "deleted subroutine name" );
ok( $c[4], "hasargs true with deleted sub" );
print "# Tests with caller(1)\n";
sub f { @c = caller(1) }
sub callf { f(); }
callf();
is( $c[3], "main::callf", "subroutine name" );
ok( $c[4], "hasargs true with callf()" );
&callf;
ok( !$c[4], "hasargs false with &callf" );
eval { f() };
is( $c[3], "(eval)", "subroutine name in an eval {}" );
ok( !$c[4], "hasargs false in an eval {}" );
eval q{ f() };
is( $c[3], "(eval)", "subroutine name in an eval ''" );
ok( !$c[4], "hasargs false in an eval ''" );
sub { f() } -> ();
is( $c[3], "main::__ANON__", "anonymous subroutine name" );
ok( $c[4], "hasargs true with anon sub" );
sub foo2 { f() }
my $fooref2 = delete $::{foo2};
$fooref2 -> ();
is( $c[3], "main::__ANON__", "deleted subroutine name" );
ok( $c[4], "hasargs true with deleted sub" );
# See if caller() returns the correct warning mask
sub show_bits
{
my $in = shift;
my $out = '';
foreach (unpack('W*', $in)) {
$out .= sprintf('\x%02x', $_);
}
return $out;
}
sub check_bits
{
local $Level = $Level + 2;
my ($got, $exp, $desc) = @_;
if (! ok($got eq $exp, $desc)) {
diag(' got: ' . show_bits($got));
diag('expected: ' . show_bits($exp));
}
}
sub testwarn {
my $w = shift;
my $id = shift;
check_bits( (caller(0))[9], $w, "warnings match caller ($id)");
}
{
no warnings;
# Build the warnings mask dynamically
my ($default, $registered);
BEGIN {
for my $i (0..$warnings::LAST_BIT/2 - 1) {
vec($default, $i, 2) = 1;
}
$registered = $default;
vec($registered, $warnings::LAST_BIT/2, 2) = 1;
}
BEGIN { check_bits( ${^WARNING_BITS}, "\0" x 12, 'all bits off via "no warnings"' ) }
testwarn("\0" x 12, 'no bits');
use warnings;
BEGIN { check_bits( ${^WARNING_BITS}, $default,
'default bits on via "use warnings"' ); }
BEGIN { testwarn($default, 'all'); }
# run-time :
# the warning mask has been extended by warnings::register
testwarn($registered, 'ahead of w::r');
use warnings::register;
BEGIN { check_bits( ${^WARNING_BITS}, $registered,
'warning bits on via "use warnings::register"' ) }
testwarn($registered, 'following w::r');
}
# The next two cases test for a bug where caller ignored evals if
# the DB::sub glob existed but &DB::sub did not (for example, if
# $^P had been set but no debugger has been loaded). The tests
# thus assume that there is no &DB::sub: if there is one, they
# should both pass no matter whether or not this bug has been
# fixed.
my $debugger_test = q<
my @stackinfo = caller(0);
return scalar @stackinfo;
>;
sub pb { return (caller(0))[3] }
my $i = eval $debugger_test;
is( $i, 11, "do not skip over eval (and caller returns 10 elements)" );
is( eval 'pb()', 'main::pb', "actually return the right function name" );
my $saved_perldb = $^P;
$^P = 16;
$^P = $saved_perldb;
$i = eval $debugger_test;
is( $i, 11, 'do not skip over eval even if $^P had been on at some point' );
is( eval 'pb()', 'main::pb', 'actually return the right function name even if $^P had been on at some point' );
print "# caller can now return the compile time state of %^H\n";
sub hint_exists {
my $key = shift;
my $level = shift;
my @results = caller($level||0);
exists $results[10]->{$key};
}
sub hint_fetch {
my $key = shift;
my $level = shift;
my @results = caller($level||0);
$results[10]->{$key};
}
$::testing_caller = 1;
do './op/caller.pl' or die $@;
|
