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|
#!perl -T
use strict;
use warnings;
use lib 't/lib';
use Test::Leaner;
use Scope::Upper qw<uplevel HERE UP SUB CALLER>;
my $n = 1_000;
plan tests => 3 + $n * (6 + 3);
my $period1 = 100;
my $period2 = 10;
my $shift = 10;
my $amp = 10;
sub PI () { CORE::atan2(0, -1) }
sub depth {
my $depth = 0;
while (1) {
my @c = caller($depth);
last unless @c;
++$depth;
}
return $depth - 1;
}
sub cap {
my ($depth, $top) = @_;
$depth <= 0 ? 1
: $depth >= $top ? $top - 1
: $depth;
}
sub base_depth {
cap($shift + int($amp * sin(2 * PI * $_[0] / $period1)), 2 * $shift + 1);
}
sub uplevel_depth {
my ($base_depth, $i) = @_;
my $h = int($base_depth / 2);
cap($h + int($h * sin(2 * PI * $i / $period2)), $base_depth);
}
sub rec_basic {
my ($base_depth, $uplevel_depth, $desc, $i) = @_;
if ($i < $base_depth) {
$i, rec_basic($base_depth, $uplevel_depth, $desc, $i + 1);
} else {
is depth(), $base_depth+1, "$desc: depth before uplevel";
my $ret = uplevel {
is depth(), $base_depth+1-$uplevel_depth, "$desc: depth inside uplevel";
is "@_", "$base_depth $uplevel_depth", "$desc: arguments";
-$uplevel_depth;
} @_[0, 1], CALLER($uplevel_depth);
is depth(), $base_depth+1, "$desc: depth after uplevel";
$ret;
}
}
sub rec_die {
my ($base_depth, $uplevel_depth, $desc, $i) = @_;
if ($i < $base_depth) {
local $@;
my $ret;
if ($i % 2) {
$ret = eval q<
rec_die($base_depth, $uplevel_depth, $desc, $i + 1)
>
} else {
$ret = eval {
rec_die($base_depth, $uplevel_depth, $desc, $i + 1)
}
}
return $@ ? $@
: $ret ? $ret
: undef;
} else {
my $cxt = SUB;
{
my $n = $uplevel_depth;
while ($n) {
$cxt = SUB UP $cxt;
$n--;
}
}
my $ret = uplevel {
is HERE, $cxt, "$desc: context inside uplevel";
die "XXX @_";
} @_[0, 1], $cxt;
$ret;
}
}
my $die_line = __LINE__-6;
is depth(), 0, 'check top depth';
is sub { depth() }->(), 1, 'check subroutine call depth';
is do { local $@; eval { depth() } }, 1, 'check eval block depth';
for my $i (1 .. $n) {
my $base_depth = base_depth($i);
my $uplevel_depth = uplevel_depth($base_depth, $i);
{
my $desc = "basic $base_depth $uplevel_depth";
my @ret = rec_basic($base_depth, $uplevel_depth, $desc, 0);
is depth(), 0, "$desc: depth outside";
is_deeply \@ret, [ 0 .. $base_depth-1, -$uplevel_depth ],
"$desc: returned values";
}
{
++$base_depth;
my $desc = "die $base_depth $uplevel_depth";
my $err = rec_die($base_depth, $uplevel_depth, $desc, 0);
is depth(), 0, "$desc: depth outside";
like $err, qr/^XXX $base_depth $uplevel_depth at \Q$0\E line $die_line/,
"$desc: correct error";
}
}
|
