#!/usr/bin/env perl
# mt-aws-glacier - Amazon Glacier sync client
# Copyright (C) 2012-2014 Victor Efimov
# http://mt-aws.com (also http://vs-dev.com) vs@vs-dev.com
# License: GPLv3
#
# This file is part of "mt-aws-glacier"
#
# mt-aws-glacier 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 of the License, or
# (at your option) any later version.
#
# mt-aws-glacier 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 this program. If not, see <http://www.gnu.org/licenses/>.
use strict;
use warnings;
use utf8;
use Test::More tests => 35;
use FindBin;
use lib map { "$FindBin::RealBin/$_" } qw{../lib ../../lib};
use TestUtils 'w_fatal';
use LCGRandom;
use Digest::SHA qw/sha256_hex/;
use Test::Deep;
ok ! eval { lcg_rand(); 1 };
like $@, qr/seed uninitialized/;
{
# make sure we have same number sequence each time
lcg_srand(0);
is sha256_hex(join(',', map { lcg_rand() } (1..10_000))), '135cbcb5641b2e7d387b083a3aa25de8e6066f28d5fe84e569dbba4ab94b1b86';
lcg_srand(0);
is sha256_hex(join(',', map { lcg_rand() } (1..10_000))), '135cbcb5641b2e7d387b083a3aa25de8e6066f28d5fe84e569dbba4ab94b1b86';
lcg_srand(764846290);
is sha256_hex(join(',', map { lcg_rand() } (1..10_000))), '8fc1c7490ccbc9fc34c484bdd94d18e3c7a43c80c8a82892127f71ce25e7d552';
# make sure it's lcg
lcg_srand(0);
cmp_deeply [ map { lcg_rand } 1..10 ], [12345,1406932606,654583775,1449466924,229283573,1109335178,1051550459,1293799192,794471793,551188310];
lcg_srand(0);
my @a = map { lcg_rand } 1..10;
lcg_srand();
my @b = map { lcg_rand } 1..10;
cmp_deeply [@b], [@a], "lcg_srand without argument works like with 0";
{
#use integer;
my $max = 2**31;
is $max % (1<<31), 0;
is ( ( ($max-1) % (1<<31) ), 2147483647);
local $LCGRandom::seed = $max-1;
is lcg_rand(), 1043980748, "should work with 64bit ints";
}
}
{
for my $seed (0, 101, 105){
lcg_srand($seed);
my @a = map { lcg_rand } 1..10;
lcg_srand($seed);
my @a1 = map { lcg_rand } 1..5;
my @bb;
lcg_srand $seed, sub {
@bb = map { lcg_rand } 1..10;
};
my @a2 = map { lcg_rand } 1..5;
cmp_deeply [@a1, @a2], [@a], "lcg_srand properly localize seed";
cmp_deeply [@bb], [@a], "lcg_srand accepts callback";
}
}
{
ok ! eval { lcg_irand(); 1 };
like $@, qr/should pass two arguments/;
ok ! eval { lcg_irand(1); 1 };
like $@, qr/should pass two arguments/;
ok ! eval { lcg_irand(1, 2, 3); 1 };
like $@, qr/should pass two arguments/;
ok ! eval { lcg_irand(2,1); 1 };
like $@, qr/b should be greater or equal than a/;
ok eval { lcg_irand(0,0); 1 };
{
our $rand_fake;
no warnings 'redefine';
local *LCGRandom::lcg_rand = sub { $rand_fake };
test_fast_ok 504, "lcg_irand produce right ranges" => sub {
for my $seed (1231236, 4_000_000_000+87654, 1_876_354_567) {
for my $base (0, -101, 103) {
for my $size (0, 1, 7, 11) {
my $previous = undef;
for my $i (1..15) {
local $rand_fake = $seed + $i;
my $a = $base;
my $b = $base+$size;
my $r = lcg_irand($a, $b);
if (defined $previous) {
if ($previous == $b) {
fast_ok $r == $a;
} else {
fast_ok $r == $previous+1;
}
}
$previous = $r;
}
}
}
}
}
}
}
{
lcg_srand 167846290 => sub {
is sha256_hex(join(',', map { lcg_irand(-114, 87) } (1..1000))), '50a3718bff562bf3151b791ce9dc9782dad03193532f5ef043b83021e25887a9';
}
}
{
lcg_srand 167846290 => sub {
for (1..5) {
my @a = map { $_ } 1..100;
my @b = lcg_shuffle @a;
is join(',', sort { $a cmp $b } @b), join(',', sort { $a cmp $b } @a);
}
};
lcg_srand 167846290 => sub {
my @a = map { lcg_rand() } 1..1000;
my @b = lcg_shuffle @a;
is sha256_hex(join(',', @b)), '9f8ad1002c5bfc23047165aaab63bbe3b1e9abdfe63e0348ffa53b90b1d9284a';
};
lcg_srand 167846290 => sub {
my @a = map { lcg_rand() } 1..2;
my @b = lcg_shuffle @a;
cmp_deeply [@a], [@b], "not necessary shuffle two elements array";
};
lcg_srand 167846291 => sub {
my @a = map { lcg_rand() } 1..2;
my @b = lcg_shuffle @a;
cmp_deeply [@a], [reverse @b], "abble to shuffle two elements array";
};
}
1;