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#!/usr/bin/perl -w
# Test broot function (and bsqrt() function, since it is used by broot()).
# It is too slow to be simple included in bigfltpm.inc, where it would get
# executed 3 times.
# But it is better to test the numerical functionality, instead of not testing
# it at all.
use Test;
use strict;
BEGIN
{
$| = 1;
# to locate the testing files
my $location = $0; $location =~ s/bigroot.t//i;
if ($ENV{PERL_CORE})
{
# testing with the core distribution
@INC = qw(../lib);
}
unshift @INC, '../lib';
if (-d 't')
{
chdir 't';
require File::Spec;
unshift @INC, File::Spec->catdir(File::Spec->updir, $location);
}
else
{
unshift @INC, $location;
}
print "# INC = @INC\n";
plan tests => 4 * 2;
}
use Math::BigFloat;
use Math::BigInt;
my $cl = "Math::BigFloat";
my $c = "Math::BigInt";
# 2 ** 240 =
# 1766847064778384329583297500742918515827483896875618958121606201292619776
# takes way too long
#test_broot ('2','240', 8, undef, '1073741824');
#test_broot ('2','240', 9, undef, '106528681.3099908308759836475139583940127');
#test_broot ('2','120', 9, undef, '10321.27324073880096577298929482324664787');
#test_broot ('2','120', 17, undef, '133.3268493632747279600707813049418888729');
test_broot ('2','120', 8, undef, '32768');
test_broot ('2','60', 8, undef, '181.0193359837561662466161566988413540569');
test_broot ('2','60', 9, undef, '101.5936673259647663841091609134277286651');
test_broot ('2','60', 17, undef, '11.54672461623965153271017217302844672562');
sub test_broot
{
my ($x,$n,$y,$scale,$result) = @_;
my $s = $scale || 'undef';
print "# Try: $cl $x->bpow($n)->broot($y,$s) == $result:\n";
ok ($cl->new($x)->bpow($n)->broot($y,$scale),$result);
$result =~ s/\..*//;
print "# Try: $c $x->bpow($n)->broot($y,$s) == $result:\n";
ok ($c->new($x)->bpow($n)->broot($y,$scale),$result);
}
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