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t/110_bignum.t  view on Meta::CPAN

    0,
    'decode bigint inside structure'
) or Dump($num);

$num = $json->decode(q|[2.0000000000000000001]|)->[0];
isa_ok( $num, 'Math::BigFloat' );

is( "$num", '2.0000000000000000001', 'decode bigfloat inside structure' )
  or Dump $num;

my $bignan = Math::BigInt->new("NaN");
my $nan = $json->encode($bignan);
is( "$nan", 'null', 'nan default' );
$nan = $json->stringify_infnan(0)->encode($bignan);
is( "$nan", 'null', 'nan null' );
$nan = $json->stringify_infnan(3)->encode($bignan);
is( "$nan", 'nan', 'nan stringify' );

my $biginf = Math::BigInt->new("Inf");
#note $biginf;
my $inf = $json->stringify_infnan(0)->encode($biginf);
is( "$inf", 'null', 'inf null' );
my $exp = "$biginf" =~ /nan/i ? "nan" : "inf";
$inf = $json->stringify_infnan(3)->encode($biginf);
is( "$inf", $exp, 'inf stringify' );

$biginf = Math::BigInt->new("-Inf");
$inf = $json->stringify_infnan(0)->encode($biginf);
#note $biginf;
is( "$inf", 'null', '-inf default' );
$exp = "$biginf" =~ /nan/i ? "nan" : "-inf";
$inf = $json->stringify_infnan(3)->encode($biginf);
is( "$inf", $exp, '-inf stringify' );

# see if allow_bignum is enough, always decodes to a BigFloat
$num = $json->decode(4.5);
isa_ok( $num, 'Math::BigFloat' );
is(
    $num->bcmp('4.5'),
    0,
    'decode simple bigfloat'
) or Dump($num);

# But a short int will not decode to a BigInt
$num = $json->decode(q|[4]|)->[0];
ok( Scalar::Util::looks_like_number($num), 'simple IV') or Dump($num);

# DOS GH #204 — resource-intensive; only run when PERL_TEST_DEVEL is set
SKIP: {
  skip "set PERL_TEST_DEVEL to run resource-intensive DOS attack tests", scalar(@DOS_DIGITS)
    unless $ENV{PERL_TEST_DEVEL};
  for (@DOS_DIGITS) {
    my $s = $_;
    my $digits = $s;
    $digits =~ s/_//g;
    # perl throws "Out of memory!" when constructing a string with 100_000_000_000 digits
    my $dos = '1' . '0' x $digits;
    note "decode bigint DOS attack with $s digits";
    # perl throws "Killed" with a bignum of about 1_000_000_000 digits
    my $num  = $json->decode($dos);
    is($num->bcmp($dos), 0, "decoded $s digits")
      or Dump ($num);
  }
}