1use strict;
2use warnings;
3
4BEGIN {
5    use Config;
6    if (! $Config{'useithreads'}) {
7        print("1..0 # SKIP Perl not compiled with 'useithreads'\n");
8        exit(0);
9    }
10}
11
12use threads;
13use Thread::Queue;
14
15BEGIN { # perl RT 133382
16if ($] == 5.008) {
17    require 't/test.pl';   # Test::More work-alike for Perl 5.8.0
18} else {
19    require Test::More;
20}
21Test::More->import();
22} # end BEGIN
23plan('tests' => 20);
24
25my $q = Thread::Queue->new(1..10);
26ok($q, 'New queue');
27
28threads->create(sub {
29    # Default count = 1
30    is($q->extract(),   1, 'No args');          # 2..10 left
31    is($q->extract(0),  2, 'Head');             # 3..10 left
32    is($q->extract(5),  8, 'Pos index');        # 3..7,9,10 left
33    is($q->extract(-3), 7, 'Neg index');        # 3..6,9,10 left
34    my $x = $q->extract(20);                    # unchanged
35    ok(! defined($x), 'Big index');
36    $x = $q->extract(-20);                      # unchanged
37    ok(! defined($x), 'Big neg index');
38})->join();
39
40$q = Thread::Queue->new(1..10);
41ok($q, 'New queue');
42
43threads->create(sub {
44    my @x = $q->extract(0, 2);                  # 3..10 left
45    is_deeply(\@x, [1,2], '2 from head');
46    @x = $q->extract(6, 2);                     # 3..8 left
47    is_deeply(\@x, [9,10], '2 from tail');
48    @x = $q->extract(2, 2);                     # 3,4,7,8 left
49    is_deeply(\@x, [5,6], '2 from middle');
50    @x = $q->extract(2, 4);                     # 3,4 left
51    is_deeply(\@x, [7,8], 'Lots from tail');
52    @x = $q->extract(3, 4);                     # unchanged
53    is_deeply(\@x, [], 'Too far');
54})->join();
55
56$q = Thread::Queue->new(1..10);
57ok($q, 'New queue');
58
59threads->create(sub {
60    my @x = $q->extract(-4, 2);                 # 1..6,9,10 left
61    is_deeply(\@x, [7,8], 'Neg index');
62    @x = $q->extract(-2, 4);                    # 1..6 left
63    is_deeply(\@x, [9,10], 'Lots from tail');
64    @x = $q->extract(-6, 2);                    # 3..6 left
65    is_deeply(\@x, [1,2], 'Max neg index');
66    @x = $q->extract(-10, 3);                   # unchanged
67    is_deeply(\@x, [], 'Too far');
68    @x = $q->extract(-6, 3);                    # 4..6 left
69    is_deeply(\@x, [3], 'Neg overlap');
70    @x = $q->extract(-5, 10);                   # empty
71    is_deeply(\@x, [4..6], 'Neg big overlap');
72})->join();
73
74exit(0);
75
76# EOF
77