#!./perl
BEGIN {
    chdir 't' if -d 't';
    @INC = '../lib';
}
use integer;
use Test::More;
use Config;
my $x = 4.5;
my $y = 5.6;
my $z;
$z = $x + $y;
is($z, 9, "plus");
$z = $x - $y;
is($z, -1, "minus");
$z = $x * $y;
is($z, 20, "times");
$z = $x / $y;
is($z, 0, "divide");
$z = $x / $y;
is($z, 0, "modulo");
is($x, 4.5, "scalar still floating point");
  
isnt(sqrt($x), 2, "functions still floating point");
  
isnt($x ** .5, 2, "power still floating point");
is(++$x, 5.5, "++ still floating point");
  
SKIP: {
    my $ivsize = $Config{ivsize};
    skip "ivsize == $ivsize", 2 unless $ivsize == 4 || $ivsize == 8;
    if ($ivsize == 4) {
        $z = 2**31 - 1;
        is($z + 1, -2147483648, "left shift");
    } elsif ($ivsize == 8) {
        $z = 2**63 - 1;
        is($z + 1, -9223372036854775808, "left shift");
    }
}
is(~0, -1, "signed instead of unsigned");
# [perl #38485] use integer; 0x80000000/-1;
SKIP: {
    my $ivsize = $Config{ivsize};
    skip "ivsize == $ivsize", 4 unless $ivsize == 4 || $ivsize == 8;
    my $iv_min = $ivsize == 4 ? -2147483648 : -9223372036854775808;
    my $biff;
    eval { $biff = $iv_min / -1 };
    is($@, '', 'IV_MIN / -1 succeeds');
    is($biff, -$iv_min, 'IV_MIN / -1 == -IV_MIN');
    eval { $biff = $iv_min % -1 };
    is($@, '', 'IV_MIN % -1 succeeds');
    is($biff, 0, 'IV_MIN % -1 == 0');
}
done_testing();