#!/usr/bin/perl -w
# Copyright 2010, 2011, 2012, 2013, 2014 Kevin Ryde
# This file is part of Math-NumSeq.
#
# Math-NumSeq is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 3, or (at your option) any later
# version.
#
# Math-NumSeq is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License along
# with Math-NumSeq. If not, see <http://www.gnu.org/licenses/>.
use 5.004;
use strict;
use Test;
use lib 't';
use MyTestHelpers;
MyTestHelpers::nowarnings();
use Math::NumSeq::CollatzSteps;
# uncomment this to run the ### lines
#use Devel::Comments;
my $test_count = (tests => 13)[1];
plan tests => $test_count;
{
# Math::NumSeq::CollatzSteps uses Math::BigInt binc() and bmul()
#
require Math::NumSeq;
my $n = Math::NumSeq::_to_bigint(123);
if (! $n->can('binc')) {
MyTestHelpers::diag ('skip due to Math::BigInt no binc() method');
foreach (1 .. $test_count) {
skip ('due to Math::BigInt no binc() method', 1, 1);
}
exit 0;
}
}
#------------------------------------------------------------------------------
# VERSION
{
my $want_version = 69;
ok ($Math::NumSeq::CollatzSteps::VERSION, $want_version,
'VERSION variable');
ok (Math::NumSeq::CollatzSteps->VERSION, $want_version,
'VERSION class method');
ok (eval { Math::NumSeq::CollatzSteps->VERSION($want_version); 1 },
1,
"VERSION class check $want_version");
my $check_version = $want_version + 1000;
ok (! eval { Math::NumSeq::CollatzSteps->VERSION($check_version); 1 },
1,
"VERSION class check $check_version");
}
#------------------------------------------------------------------------------
# characteristic()
{
my $seq = Math::NumSeq::CollatzSteps->new;
ok ($seq->characteristic('smaller'), 1, 'characteristic(smaller)');
ok ($seq->characteristic('integer'), 1, 'characteristic(integer)');
ok (! $seq->characteristic('increasing'), 1,
'characteristic(increasing)');
ok (! $seq->characteristic('non_decreasing'), 1,
'characteristic(non_decreasing)');
ok ($seq->characteristic('increasing_from_i'), undef,
'characteristic(increasing_from_i)');
ok ($seq->characteristic('non_decreasing_from_i'), undef,
'characteristic(non_decreasing_from_i)');
my @pnames = map {$_->{'name'}} $seq->parameter_info_list;
ok (join(',',@pnames), 'step_type,on_values');
}
#------------------------------------------------------------------------------
# ith()
my $uv_bits = 0;
{
my $uv = ~0;
while ($uv) {
$uv_bits++;
$uv >>= 1;
last if $uv_bits >= 64;
}
}
MyTestHelpers::diag ("uv_bits is $uv_bits");
{
my $seq = Math::NumSeq::CollatzSteps->new;
foreach my $elem (
[0xFFFF_FFFF, 451],
($uv_bits >= 64
? [eval '18446744073709551615', 863] # 2^64-1
: [0,0]),
) {
my ($i, $want_value) = @$elem;
### $i
my $got_value = $seq->ith($i);
### $got_value
ok ($got_value, $want_value, "CollatzSteps ith($i)");
}
}
exit 0;