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|
#!perl -T
use strict;
use warnings;
use Test::More tests => ((3 * 4) / 2) * 2 * 2 + 8;
use Scope::Upper qw<uplevel HERE CALLER>;
sub callstack {
my ($check_args) = @_;
my $i = 1;
my @stack;
while (1) {
my @c = $check_args ? do { package DB; caller($i++) }
: caller($i++);
last unless @c;
if ($check_args) {
my $args = $c[4] ? [ @DB::args ] : undef;
push @c, $args;
}
push @stack, \@c;
}
return \@stack;
}
my @stacks;
sub three {
my ($depth, $code) = @_;
$stacks[0] = callstack(1);
&uplevel($code, 'three', CALLER($depth));
}
my $two = sub {
$stacks[1] = callstack(1);
three(@_, 'two');
};
sub one {
$stacks[2] = callstack(1);
$two->(@_, 'one');
}
sub tester_sub { callstack(1) }
my $tester_anon = sub { callstack(1) };
my @subs = (\&three, $two, \&one);
for my $height (0 .. 2) {
my $base = $subs[$height];
for my $anon (0, 1) {
my $code = $anon ? $tester_anon : \&tester_sub;
for my $depth (0 .. $height) {
my $desc = "callstack at depth $depth/$height";
$desc .= $anon ? ' (anonymous callback)' : ' (named callback)';
local $@;
my $result = eval { $base->($depth, $code, 'zero') };
is $@, '', "$desc: no error";
is_deeply $result, $stacks[$depth], "$desc: correct call stack";
}
}
}
sub four {
my $cb = shift;
&uplevel($cb, 1, HERE);
}
{
my $desc = "recalling in the coderef passed to uplevel (anonymous)";
my $cb;
$cb = sub { $_[0] ? $cb->(0) : callstack(0) };
local $@;
my ($expected, $got) = eval { $cb->(1), four($cb) };
is $@, '', "$desc: no error";
$expected->[1]->[3] = 'main::four';
is_deeply $got, $expected, "$desc: correct call stack";
}
sub test_named_recall { $_[0] ? test_named_recall(0) : callstack(0) }
{
my $desc = "recalling in the coderef passed to uplevel (named)";
local $@;
my ($expected, $got) = eval { test_named_recall(1),four(\&test_named_recall) };
is $@, '', "$desc: no error";
$expected->[1]->[3] = 'main::four';
is_deeply $got, $expected, "$desc: correct call stack";
}
my $mixed_recall_1;
sub test_mixed_recall_1 {
if ($_[0]) {
$mixed_recall_1->(0)
} else {
callstack(0)
}
}
$mixed_recall_1 = \&test_mixed_recall_1;
{
my $desc = "recalling in the coderef passed to uplevel (mixed 1)";
local $@;
my ($expected, $got) = eval { test_mixed_recall_1(1), four($mixed_recall_1) };
is $@, '', "$desc: no error";
$expected->[1]->[3] = 'main::four';
is_deeply $got, $expected, "$desc: correct call stack";
}
my $mixed_recall_2_bis = do {
my $mixed_recall_2;
{
my $fake1;
eval q{
my $fake2;
{
my $fake3;
sub test_mixed_recall_2 {
$fake1++;
$fake2++;
$fake3++;
if ($_[0]) {
$mixed_recall_2->(0)
} else {
callstack(0)
}
}
}
};
}
$mixed_recall_2 = \&test_mixed_recall_2;
};
{
my $desc = "recalling in the coderef passed to uplevel (mixed 2)";
local $@;
my ($expected, $got) = eval { test_mixed_recall_2(1), four($mixed_recall_2_bis) };
is $@, '', "$desc: no error";
$expected->[1]->[3] = 'main::four';
is_deeply $got, $expected, "$desc: correct call stack";
}
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