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|
# -*- mode: perl; -*-
# test that config ( trap_nan => 1, trap_inf => 1) really works/dies
use strict;
use warnings;
use Test::More tests => 90;
my $mbi = 'Math::BigInt';
my $mbf = 'Math::BigFloat';
my $mbr = 'Math::BigRat';
use_ok($mbi);
use_ok($mbf);
use_ok($mbr);
my $x;
foreach my $class ($mbi, $mbf, $mbr) {
# can do?
can_ok($class, 'config');
###########################################################################
# Default values.
###########################################################################
# defaults are okay?
is($class->config("trap_nan"), 0, 'trap_nan defaults to 0');
is($class->config("trap_inf"), 0, 'trap_inf defaults to 0');
###########################################################################
# Trap NaN.
###########################################################################
# can set?
$class->config( trap_nan => 1 );
is($class->config("trap_nan"), 1, qq|$class->config( trap_nan => 1 );|);
# can reset?
$class->config( trap_nan => 0 );
is($class->config("trap_nan"), 0, qq|$class->config( trap_nan => 0 );|);
# can set via hash ref?
$class->config( { trap_nan => 1 } );
is($class->config("trap_nan"), 1, qq|$class->config( { trap_nan => 1 } );|);
# 0/0 => NaN
$x = $class->new("0");
eval { $x->bdiv(0); };
like($@, qr/^Tried to /, qq|\$x = $class->new("0"); \$x->bdiv(0);|);
# new() didn't modify $x
is($x, 0, qq|\$x = $class->new("0"); \$x->bdiv(0);|);
# also test that new() still works normally
eval { $x = $class->new('42'); $x->bnan(); };
like($@, qr/^Tried to /, 'died');
is($x, 42, '$x after new() never modified');
# can reset?
$class->config( trap_nan => 0 );
is($class->config("trap_nan"), 0, qq|$class->config( trap_nan => 0 );|);
###########################################################################
# Trap inf.
###########################################################################
# can set?
$class->config( trap_inf => 1 );
is($class->config("trap_inf"), 1, 'trap_inf enabled');
eval { $x = $class->new('4711'); $x->binf(); };
like($@, qr/^Tried to /, 'died');
is($x, 4711, '$x after new() never modified');
eval { $x = $class->new('inf'); };
like($@, qr/^Tried to /, 'died');
is($x, 4711, '$x after new() never modified');
eval { $x = $class->new('-inf'); };
like($@, qr/^Tried to /, 'died');
is($x, 4711, '$x after new() never modified');
# +$x/0 => +inf
eval { $x = $class->new('4711'); $x->bdiv(0); };
like($@, qr/^Tried to /, 'died');
is($x, 4711, '$x after new() never modified');
# -$x/0 => -inf
eval { $x = $class->new('-0815'); $x->bdiv(0); };
like($@, qr/^Tried to /, 'died');
is($x, '-815', '$x after new not modified');
$class->config( trap_nan => 1 );
# 0/0 => NaN
eval { $x = $class->new('0'); $x->bdiv(0); };
like($@, qr/^Tried to /, 'died');
is($x, '0', '$x after new not modified');
}
##############################################################################
# Math::BigInt
$x = Math::BigInt->new(2);
eval { $x = $mbi->new('0.1'); };
is($x, 2, 'never modified since it dies');
eval { $x = $mbi->new('0a.1'); };
is($x, 2, 'never modified since it dies');
##############################################################################
# Math::BigFloat
$x = Math::BigFloat->new(2);
eval { $x = $mbf->new('0.1a'); };
is($x, 2, 'never modified since it dies');
##############################################################################
# BigRat
Math::BigRat->config(trap_nan => 1,
trap_inf => 1);
for my $trap (qw/ 0.1a +inf inf -inf /) {
my $x = Math::BigRat->new('7/4');
note(""); # this is just for some space in the output
# In each of the cases below, $x is not modified, because the code dies.
eval { $x = $mbr->new("$trap"); };
is($x, "7/4", qq|\$x = $mbr->new("$trap");|);
eval { $x = $mbr->new("$trap"); };
is($x, "7/4", qq|\$x = $mbr->new("$trap");|);
eval { $x = $mbr->new("$trap/7"); };
is($x, "7/4", qq|\$x = $mbr->new("$trap/7");|);
}
# all tests done
|
