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#!/usr/bin/perl -w
# test that config ( trap_nan => 1, trap_inf => 1) really works/dies
use strict;
use Test::More tests => 29;
use Math::BigRat;
my $mbi = 'Math::BigRat';
my ($cfg,$x);
foreach my $class ($mbi)
{
# can do and defaults are okay?
can_ok ($class, 'config');
is ($class->config()->{trap_nan}, 0);
is ($class->config()->{trap_inf}, 0);
# can set?
$cfg = $class->config( trap_nan => 1 ); is ($cfg->{trap_nan},1);
# can set via hash ref?
$cfg = $class->config( { trap_nan => 1 } ); is ($cfg->{trap_nan},1);
# also test that new() still works normally
eval ("\$x = \$class->new('42'); \$x->bnan();");
like ($@, qr/^Tried to set/);
is ($x,42); # after new() never modified
# can reset?
$cfg = $class->config( trap_nan => 0 ); is ($cfg->{trap_nan},0);
# can set?
$cfg = $class->config( trap_inf => 1 ); is ($cfg->{trap_inf},1);
eval ("\$x = \$class->new('4711'); \$x->binf();");
like ($@, qr/^Tried to set/);
is ($x,4711); # after new() never modified
# +$x/0 => +inf
eval ("\$x = \$class->new('4711'); \$x->bdiv(0);");
like ($@, qr/^Tried to set/);
is ($x,4711); # after new() never modified
# -$x/0 => -inf
eval ("\$x = \$class->new('-0815'); \$x->bdiv(0);");
like ($@, qr/^Tried to set/);
is ($x,-815); # after new() never modified
$cfg = $class->config( trap_nan => 1 );
# 0/0 => NaN
eval ("\$x = \$class->new('0'); \$x->bdiv(0);");
like ($@, qr/^Tried to set/);
is ($x,0); # after new() never modified
}
##############################################################################
# BigRat
$cfg = Math::BigRat->config( trap_nan => 1 );
for my $trap (qw/0.1a +inf inf -inf/)
{
my $x = Math::BigRat->new('7/4');
eval ("\$x = \$mbi->new('$trap');");
is ($x,'7/4'); # never modified since it dies
eval ("\$x = \$mbi->new('$trap');");
is ($x,'7/4'); # never modified since it dies
eval ("\$x = \$mbi->new('$trap/7');");
is ($x,'7/4'); # never modified since it dies
}
# all tests done
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