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